2. Frick
  3. NGC Rotary Screw Compressors

Frick NGC Rotary Screw Compressors Installation Operation and Maintenance Guide

  • Hello! I've reviewed the Equipment Manual for Frick NGC Rotary Screw Gas Compressors, models 100, 150, 200, 250, 300, 400 and 450. This document includes crucial information on rigging, assembly, start-up, and maintenance, and covers features like the VOLUMIZER volume ratio control and the importance of proper lubrication. I'm ready to assist you with any questions you may have about these compressors.
  • What is the recommended oil for the NGC compressor?
    What should be done if the compressor is stored for an extended period?
    What is the direction of rotation for the compressor?
    What pressure are the suction and discharge flanges rated to?
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Contents
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
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
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     
     
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        
       
    
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        
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
        
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         
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         
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        
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
     



       
        


    



       
          




        


      
     

        



       




      

       


   

        


         


         



        





   









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





         
      
  

       
        

           

        



   





       

         





       
    



       


       

      





 
     
  




 
  
   
   
   
   
 









  
   
        

         
      







 
   
    
     
        
      
        
       


        
       



       
       
       
     
   
  





      

  

          
     








          

         


        






       
        
       


       
       
        



      
     
      
         



         
          



  

          
          

     
  


      

           
         



     


       
      
 
         


        

 



NGC
MODEL
MIN.
VI
MAX.
VI
MIN.
CAPACITY
SLIDE
VALVE
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SLIDE
STOP
TRAVEL*
100     
150     
200     
250     
300     
400     
450     







       
       
     
      

        
      
     



       

   
       




       

        




       



        



         
         




     





 
 
 
 
 
 
      




for reference


 
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  
  
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

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

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 
 
  








 

 

 







   
P 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Manifold Block Pressure
SB-3 1 1/16-12UN-2B Straight Thread O-ring — Compressor Oil Supply
SC-5 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Inlet Pressure
SC-6 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Discharge Pressure
SC-7 1/8-27 NPTF — Seal Weepage
SC-8 1 1/16-12UN-2B Straight Thread O-ring — Closed Thread Drain
SC-9 9/16-18UNF-2B Straight Thread O-ring — Inlet Housing Drain
SC-13 9/16-18UNF-2B Straight Thread O-ring — Cylinder Oil Drain
SC-15 1 5/8-12UN-2B Straight Thread O-ring 1-11 1/2 NPTF Gear Box Oil Drain
SC-16 9/16-18UN-2B Straight Thread O-ring — Discharge Housing Oil Drain
SC-17 2-11 1/2 NPTF — Inlet Pressure
SM-1 1 1/16-12UN-2B Straight Thread O-ring 3/4-14 NPTF Main Oil Injection
T 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Manifold Block Tank






   
P 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Manifold Block Pressure
SB-3 1 1/16-12UN-2B Straight Thread O-ring 1/2-14 NPTF Compressor Oil Supply
SC-5 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Inlet Pressure
SC-6 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Discharge Pressure
SC-7 1/8-27 NPTF — Seal Weepage
SC-9 9/16-18UNF-2B Straight Thread O-ring — Inlet Housing Drain
SC-11 1 5/16-12UN-2B Straight Thread O-ring 3/4-14 NPTF Closed Thread Drain
SC-13 9/16-18UNF-2B Straight Thread O-ring — Cylinder Oil Drain
SC-14 9/16-18UN-2B Straight Thread O-ring — Inlet Pressure
SC-15 1 5/16-12UN-2B Straight Thread O-ring 1-11 1/2 NPTF Gear Box Oil Drain
SC-16 1 1/16-12UN-2B Straight Thread O-ring — Discharge Housing Oil Drain
SC-17 2-11 1/2 NPTF — Inlet Pressure
SM-1 1 5/16-12UN-2B Straight Thread O-ring 3/4-14 NPTF Main Oil Injection
SV-1 2" Square Flange — Vapor Injection-Tongue & Groove
T 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Manifold Block Tank







   
P 1 1/16-12UN-2B Straight Thread O-ring 1/2-14 NPTF Manifold Block Pressure
SB-3 1 1/4 Square Flange — Compressor Oil Supply
SC-5 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Inlet Pressure
SC-6 9/16-18UNF-2B Straight Thread O-ring 1/4-18 NPTF Discharge Pressure
SC-7 1/8-27 NPTF — Seal Weepage
SC-8 1 5/16-12UN-2B Straight Thread O-ring — Closed Thread Drain
SC-9 9/16-18UNF-2B Straight Thread O-ring — Inlet Housing Drain
SC-13 9/16-18UNF-2B Straight Thread O-ring — Cylinder Oil Drain
SC-15 1 5/8-12UN-2B Straight Thread O-ring 1-11 1/2 NPTF Gear Box Oil Drain
SC-16 1 1/16-12UN-2B Straight Thread O-ring — Discharge Housing Oil Drain
SC-17 2-11 1/2 NPTF — Inlet Pressure
SM-1 2" Square Flange — Main Oil Injection
T 3/4-16UNF-2B Straight Thread O-ring 1/2-14 NPTF Manifold Block Tank







  
SB-2 3/4-14 NPTF
Inlet Bearings, Balance Pistons, Manifold Block Pressure
SB-3 2" Square Flange Compressor Oil Supply
SC-4 1/2-14 NPTF Inlet Oil Drain
SC-5 3/8-18 NPTF Inlet Pressure
SC-6 3/8-18 NPTF Discharge Pressure
SC-7 1/8-27 NPTF Seal Weepage
SC-8 1 1/4-11 1/2 NPT Closed Thread Drain
SC-9 1 1/2-11 1/2 NPT Closed Thread Drain
SC-13 1/2-14 NPTF Cylinder Oil Drain
SC-15 1 1/4-11 1/2 NPTF Gear Cover Oil Drain
SC-16 1 1/2-11 1/2 NPT
Discharge Housing Oil Drain
SC-17 1/2-14 NPTF
Discharge Housing Sump Drain
SL-1 1 1/4-11 1/2 NPT Low Vi Liquid Injection
SL-2 1 1/4-11 1/2 NPT High Vi Liquid Injection
SM-1 2" Square Flange Main Oil Injection
SV-1 3" Square Flange Economizer
T 1/2-14 NPTF Manifold Block Tank





         

        

          






 
       
       



      













    
        



         


      



   
   
   
 
      

      



       



  



      


ALLOWABLE FLANGE LOADS
NOZ. MOMENTS (ft-lbf) LOAD (lbf)
SIZE AXIAL VERT. LAT. AXIAL VERT. LAT.
NPS MRMCMLP VCVL
1 25 25 25 50 50 50
1.25 25 25 25 50 50 50
1.5 50 40 40 100 75 75
2 100 70 70 150 125 125
3 250 175 175 225 250 250
4 400 200 200 300 400 400
5 425 400 400 400 450 450
6 1,000 750 750 650 650 650
8 1,500 1,000 1,000 1,500 900 900
10 1,500 1,200 1,200 1,500 1,200 1,200
14 2,000 1,800 1,800 1,700 2,000 2,000










    
     



         

β
       






          

 
         
        



        


        




        

 
      


  
 
  


      


         
      












           







       


1. Couplingmustbeabletotakeupanymisalignmentbe-
tweenmotorandcompressor.Itiscriticaltothelifeof
theshaftsealthatmisalignmentiskepttotheminimum
possiblevalue.Besuretofollowthecouplingmanufac-
turer’sguidelinesforcheckingandcorrectinganymis-
alignment.
2. Forallengineapplications,atorsionalvibrationanalysis
of the complete system must be performed including:
engine-coupling-compressor(includinggearing).This
istoensurethatthesystemwillrunwellawayfromany
naturalfrequencies.Seepage19fordrivelineandgear
dimensionsfortorsionalvibrationanalysis.Datafortor-
sional stiffness, rotating mass and inertia of the com-
pressorcomponentsisavailable.


 












     



      
















       










1. Inspect the shaft of the compressor to ensure that no
nicks,grease,orforeignmatterispresent.
2. Inspectthecouplingcomponentstomakesurethatthey
arefreeofburrsandareclean.
3. Checkthatthekey(issoequipped)tsthecompressor
hubandshaftproperly.
4. Duringinstallationofthecouplinghub becarefullynot
toputanyexcessloadonthecompressorbearingsand
shaftsealinanyway.Neverhammeronthehubasthis
canleadtobearingfailure.
5. Couplingshallbe alignedaccordingtocoupling manu-
facturer’srequirements.
          

         



        

        

       
         




        
           
        



       
        


END VIEW
DIN CONNECTOR
STAINLESS STEEL WELL
HEAT ISOLATOR
CAST ALUMINUM HOUSING
COMPRESSOR UNLOAD CYLINDER
SHADED AREA SHOWS
CAPACITY LINEAR TRANSMITTER


 















       
        




     





         

       





      



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






      

         
       




        
         
        
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




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      
          
   



     

  
        
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
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
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






         
          
        
      



         
          
        
       

        




        


  


      

          
      

 


 
 

      



      

 
 
        

        







    

       




           
        






      



      
 
 
 

 

 
 



      


         
      

       


      
        

         

 
        


         
  


       




 
   
         


 









         

 
 
 
      

          

 
 
 
 








         









REQUIRED
MAINTENANCE
(To fulll warranty conditions)
HOURS OPERATION (MAXIMUM)
200
750
5,000
8,000
10,000
15,000
20,000
25,000
30,000
35,000
40,000
45,000
50,000
55,000
60,000
65,000
70,000
75,000
80,000
85,000
90,000
95,000
 As Directed By Oil Analysis
 One to three months, depending on gas composition and recommendation of system
provider or Frick Oil Analysis Report.
 n n Maximum interval between lter(s) replacement = 2,250 hours.
 Maximum every 6 months; more frequently if levels increase.
 When leak rate exceeds 7 - 8 drops per minute.
nnnnnnnnnnn

Compressor oil lter(s) should be replaced at  and again within the rst 
 of new compressor operation. However, if the compressor oil lter differential
reaches  before either of these scheduled maintenance points - replace the oil
lter(s).
For Natural Gas Applications, compressor oil lter(s) replacement is recommended
every

of compressor operation, with compressor oil lter differential


Systems that contain comtaminants may require more frequent
compressor oil lter(s) replacement, as compressor oil lter differential should not
exceed 10 psid.
 Periodic vibration spectra should be recorded giving velocity, acceleration, and spike
energy or acceleration enveloping data against frequency every 6 months, or more
frequently if levels are increasing.
If an FFT Spectrum Analyzer is not available, vibration trending, using an overall
vibration meter may be substituted. The overall vibration meter should be available to
read Velocity (zero-peak, in/sec), and Acceleration (g’s). The overall vibration meter
Velocity range should be 0 - 1000 Hz. The Acceleration range should be 0 - 10,000 Hz.
If vibration trending is to be used to monitor changes in the condition of the
compressor, a baseline must be established within the rst 750 hours of operation and
rechecked every 3-6 months thereafter.
Overall vibration readings should be taken using Acceleration and Velocity for CMIA,
CFIA, CIV, and COV. The overall readings should be recorded and kept on le.
Action should be taken if overall vibration reading increases to 1.5 times baseline velocity
readings, or to 2.0 times baseline acceleration readings, taken at 100% Slide Valve position.
Use of Frick PhD on-board vibration analysis is an acceptable substitute for periodic
readings.





       




        






(Less Gears)
  
1 3.5 1.54
2 4.13 3.61
3 4.33 2.39
4 5 .62
5 6.75 3.38
6 11.79 15.37 (NGC/H 400)
33.53 (NGC/H 450)
7 6.75 3.38
8 5 .62
9 4.33 4.96 (NGC 400/450)
6.16 (NGCH 400/450)
10 4 10.98 (NGC 400/450)
9.79 (NGCH 400/450)
11 See Gear Dimensions See Gear Dimensions
12 See Gear Dimensions See Gear Dimensions
13 4.33 2.36
14 5 5
15 See Gear Dimensions See Gear Dimensions
16 5 1.12
17 4.33 5
18 4 2.35
19 3.75 11
20 4 4.93
*Dimensions in inches




     
A 8.13 1.25 16.13 3 21.1 2.75
B 8.13 1.25 14.6 3 22.63 2.75
C 8.13 1.25 12.76 3 24.48 2.75
D 8.13 1.25 11.43 3 25.8 2.75
E 8.13 1.25 10.48 3 26.75 2.75
F 8.13 1.25 9.66 3 27.57 2.75
*Dimensions in inches

 
 

 


 

 
132
4
56
8 9 10
11
13
14 16 17 18
19
Male Rotor
Jackshaft
20
12
11A 12A
15
15A
7








        

        

 

       
         









        




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        
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 
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        
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 
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          
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      
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      
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       
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         
       
        
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        
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       

 
 
 
 

 
 
 
 
 



        
         



         





         

        

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