Maxon MICRO-RATIO® Valves Operating instructions

Maxon
Brand
Maxon
Model
MICRO-RATIO® Valves
Type
Operating instructions

This manual is also suitable for

Flow Control Valves Page 7003
6/11
Design and Application Details
MICRO-RATIO® Valves
Principle of Operation
MICRO-RATIO® Valve assemblies typically consist
of a fixed-gradient air butterfly valve mechanically
linked to one or more adjustable gradient SYNCHRO
Fuel Control Valve(s).
The tandem linkage gives accurate proportioning of
the air/fuel(s) ratios required for your specific burner
system/application.
The multiple screw adjustment feature of the
SYNCHRO Valve provides a mechanical means of
adjusting the air/fuel(s) ratios at each of twelve valve
positions throughout the capacity range of each valve.
Maximum application flexibility is provided from
over 500 possible valve combinations.
Air-gas-oil valves in tandem-linked combination
are ideal for multi-zone or stand-by fuel system control.
Air-gas-oil SYNCHRO Valves may be used
independently for single control or throttling of
multiple flow paths or fuels.
Nomenclature
MICRO-RATIO® Valve assemblies are designated
by listing the individual valves, starting with the air
valve, then each of the fuel valves to be included, as
well as their relative position in the assembly.
Examples:
“Duplex” MICRO-RATIO ® Valve assembly
M- 6" x 2" -P
(air) x (gas)
“Quadriplex” MICRO-RATIO ® Valve assembly
M- 10" x 4" -M x 1/2" -O -200 x 2" -P
(air) x (gas) x (oil) x (gas)
Cut-away view of
2-1/2" -P
SYNCHRO Gas
Valve with standard
cam assembly
Cut-away view of M- 3" x 1-1/4" -P MICRO-RATIO ® Valve
Cut-away view of
3/4" -O -200
SYNCHRO Oil Valve
with standard cam
assembly
Page 7004 Flow Control Valves
Capacities and Specifications
SYNCHRO and MICRO-RATIO® Valves
General
All Maxon Flow Control Valves are designed for
throttling service only and are not intended for
tight shut-off.
Flow direction is not a factor with butterfly-type
valve bodies; however, with poppet-type SYNCHRO
Valves, fluid flow through the valve must only be in
the direction indicated by the arrowhead cast into
each valve body.
All valve combinations will be assembled in “right
hand” flow direction unless specified as “left hand”
assembly. When looking directly at the air valve
indicator dial, a “right hand” arrangement is indicated
by flow coming from the right side of the fuel valve
quadrant and flowing to the left side. A “left hand”
assembly is opposite, with flow from left to right.
For instructions for reversing valve body flow
direction in the field, see page 7016.
Torque requirements listed in tables below are
important and are to be used in selecting your
automatic control operators. Torque figures (inch-
pounds) are additive for your complete MICRO-
RATIO® Valve assembly.
Example:
For M- 6" x 2" -P MICRO-RATIO® Valve:
M- 6" requires 60 in-lbs
2" -P requires 90 in-lbs
M- 6" x 2" -P assembly requires 150 in-lbs
The automatic control motor you select must be
capable of developing at least 150 in-lbs of torque in
order to throttle this particular MICRO-RATIO® Valve
combination if valve is applied at maximum inlet
pressures shown.
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Flow Control Valves Page 7005
11/90
Performance Data
(M-) Style Control Valves – Air Service
Air Valves are normally
sized to match the combustion
air pipe sizing. Pressure drops
of 1" wc to 2.5" wc are typical.
If supply pressures are higher
than required, smaller valves
can be used, or travel limited to
restrict maximum flow rate.
Note: The capacities and
pressure drops indicated in
this chart are based on flow
through a wide-open valve. If
valve is less than fully open,
higher drops and lower flows
will result.
[1] S.T.P. = Standard
Temperature and Pressure
defined at: (60°F and 14.7
PSIA and 15.6°C and 760mm
Hg)
Page 7006 Flow Control Valves
SYNCHRO Gas Valves – Natural Gas Service
Performance Data
Note: The capacities and
pressure drops indicated in
this chart are based on flow
through a wide-open valve. If
valve is less than fully open,
higher drops and lower flows
will result.
[1] S.T.P. = Standard
Temperature and Pressure
defined at: (60°F and 14.7 PSIA
and 15.6°C and 760mm Hg)
Gas Valves are normally
sized based on inlet pressure
and allowable pressure drop.
See guidelines at right.
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Flow Control Valves Page 7007
11/90
Performance Data
SYNCHRO Gas Valves – Propane Gas Service
Note: The capacities
and pressure drops
indicated in this chart
are based on flow
through a wide-open
valve. If valve is less
than fully open, higher
drops and lower flows
will result.
[1] S.T.P. = Standard
Temperature and
Pressure defined at: (60°F
and 14.7 PSIA and 15.6°C
and 760mm Hg)
Gas Valves are normally sized
based on inlet pressure and
allowable pressure drop. See
guidelines at right.
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Page 7008 Flow Control Valves
Performance Data
SYNCHRO Oil Valves – #2 Fuel Oil Service
Oil Valves are normally sized for
approximately 5 psi pressure drop. For #2 oil
service, see chart at left.
For preheated #5 or #6 oil, multiply the
required flow rate in gph by the factor given in
the table shown below the chart, then select a
valve based upon that equivalent flow of #2 oil
and its allowable pressure drop.
For example: To size for 5 psi drop with a 50 gph
flow of #6 preheated to 140°F, the multiplier is “2”.
Equivalent flow of #2 oil is then 50 x 2, or 100 gph.
Chart shows that a 5 psi drop will require use of a
1/2" -O -100 SYNCHRO Oil Valve.
Note: The capacities and pressure drops
indicated in this chart are based on flow
through a wide-open valve. If valve is less
than fully open, higher drops and lower flows
will result.
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Flow Control Valves Page 7009
6/11
Dimensions (in inches)
(M-) Style Manual Air Control Butterfly-type Valves
M- 1-1/2" through M- 4" Valves M- 6" through M- 18" Valves
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
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"3-M 26.20.460.
426.20.226.2
"4-M 91.352.465.491.321.291.3
"6-M 60.652.460.644.421.244.4
"8-M 5.75.465.788.521.121.0152.288.5
"01-M 57.75.683.85.626.
383.2152.352.18
"21-M 57.813.55.98 26.483.31 96.2
5.1
5.9
"41-M 57.983.55.0196.857.55.415.01
"61-M 26.0121.8 83.11 96.926.683.5160.45
7.11
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Page 7010 Flow Control Valves
Dimensions (in inches)
SYNCHRO Oil Valves SYNCHRO Gas Poppet Valves
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
NOTE: 1/2" through 1" SYNCHRO Oil Valves are also available in ISO Rp 7/1 and ISO 228-1 threads.
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Flow Control Valves Page 7011
6/11
Dimensions (in inches)
(-M) Style SYNCHRO Butterfly-type Gas Valves (1-1/2" through 6") – cast iron bodies
Pipe threads on this page conform to NPT
(ANSI Standard B2.1)
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S-"4 52.891.391.321
.457.291.3
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83.2
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Page 7012 Flow Control Valves
Dimensions (in inches)
(-M) Style SYNCHRO Butterfly-type Gas Valves (8" through 12") – cast iron bodies
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
NOTE: 10M and 12M SYNCHRO Valves are available as specials only
Page 7013
6/11
Dimensions (in inches)
(-M) Style SYNCHRO Butterfly-type Gas Valves
(1-1/2" through 4" sizes, steel bodies)
Pipe threads on this page
conform to NPT
(ANSI Standard B2.1)
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M-"3 13.421.
84 57.388.9257.3
M-"4 60.5952.465.457.0121.25.48
1-1/2" through 3" -M Valves
Flow Control Valves
4" -M Valves
Page 7014 Flow Control Valves
Dimensions (in inches)
MICRO-RATIO® Valve arrangements (right hand arrangement shown)
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
For dimensions not
shown on this page,
see pages 7009
through 7013.
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Flow Control Valves Page 7015
10/94
Component Identification
MICRO-RATIO® and SYNCHRO Flow Control Valves
(-P) SYNCHRO Gas Valve
Poppet-type
(-O) SYNCHRO Oil Valve
Poppet-type
(-M) SYNCHRO Gas Valve
Butterfly-type
Duplex MICRO-RATIO® Valve
(M-) air valve with (-M) type gas valve
Legend
Item Description
1 Adjusting Screws
2 Cam Springs
3 Plunger/Cap Assembly
4 Plunger Bushing
5 Set Collar
6 Operating Crank
7 Upper Spring Retainer
8 Gas Valve Spring
9 Spring Return Shaft
10 Shaft Retainer
11 Lower Spring Retainer
12 Packing Collar
13 O-rings
14 Operating Shaft
15 Valve Disc
16 Valve Body
17 Valve Disc Spring
18 Valve Disc Guide
19 Valve Stem
20 Spring Support Plug
21 Stud Bolt
22 Bushing
23 Locking Screw
Suggested Spare Parts
– Cam Springs
– Plunger/Cap Assembly
– Adjusting Screws
Order spare parts for Flow Control Valves by identifying required
items from drawings above, and referencing information on SYNCHRO
Valve nameplate (shown at right)
SYNCHRO Valve Nameplate
Page 7016 Flow Control Valves
Suggested Maintenance/Inspection Procedures
Maxon MICRO-RATIO® Valves
Field Rotation of SYNCHRO Valves in
MICRO-RATIO® Valve Assemblies
Flow direction through (-P) and (-O) poppet-type
SYNCHRO Valves must be in the direction indicated
on valve body casting. If reversal of the SYNCHRO
Valve body is required for piping convenience, follow
these steps:
1. Loosen neck set screws (one on each side) [1].
2. Remove bracket cap screws [2] and save.
3. Remove valve body [3] while supporting air butterfly
[5] and adjusting screw carrier assembly [4].
4. Rotate valve body [3] 180°, then reposition and
install bracket cap screws [2] loosely.
5. Check carefully that screw carrier assembly [4] is
lowered into position, then tighten neck set screws
[1] into neck indentation.
6. Tighten bracket cap screws [2].
Valve Lubrication Suggestions
Some lubrication of moving parts may be
required. All moving parts, O-rings and cam strips are
lubricated at time of manufacturing. A periodic
inspection should be performed to insure all parts
continue to move freely and function properly. A
periodic re-application of lubricant will extend the
service life of your Maxon MICRO-RATIO® Valve.
The following lubricants are suggested:
Manufacturer Lubricant
Keystone Div., #84-EP-2, NLGI #2
Philadelphia, PA Lithium base grease
Standard Oil Co. Stanolith grease #42
(of Indiana)
Shell Oil Co. Alvania grease #1
Stewart Warner Corp. Alemite lubricant #32
Flow Control Valves Page 7017
6/11
Capacities and Specifications
Series “CV” Control Valves and Series “BV” Balancing Valves
General
All Maxon Flow Control Valves are designed for
throttling service only and are not intended for
tight shut-off.
Series “CV” Valves are offered in four different
versions:
1. Standard assemblies without connecting base and
linkage (CB & L) assembly (order CB & L
separately)
2. UL (Underwriters Laboratory) listed assemblies
without CB & L (CB & L ordered separately)
3. Standard assemblies with CB & L to accept electric
control operators, such as:
A. Penn/Johnson #M-80 or #M-81
B. Honeywell #M644, #M744, #M941, #M944 or
#M7044
C. Barber-Colman #EA50
Designations
Both of these valve types are designated first by the
nominal pipe size (inlet and outlet) followed by the
letters indicating the valve series.
Example:
1" - Series “BV” Balancing Valve
1-1/4" -U Series “CV” Control Valve
UL (Underwriters Laboratory) listed series “CV”
Valve assemblies are available in all sizes for air,
natural gas and liquefied petroleum gas service.
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Page 7018 Flow Control Valves
Performance Data
Series “BV” and “CV” Gas Control Valves – Natural Gas Service
Note: The capacities and
pressure drops indicated in
this chart are based on
flow through a wide-open
valve. If valve is less than
fully open, higher drops
and lower flows will result.
[1] S.T.P. = Standard
Temperature and Pressure
defined at: (60°F and 14.7
PSIA and 15.6°C and 760mm
Hg)
Gas Valves are normally
sized based on inlet
pressure and allowable
pressure drop. See
guidelines at left.
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cw"5-cw"3cw"5.1-cw"5.0
iso8-iso4cw"2-cw"1
iso61-iso8cw"5-cw"2
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Flow Control Valves Page 7019
6/11
Series “BV” and “CV” Gas Control Valves – Propane Gas Service
Performance Data
Note: The capacities and
pressure drops indicated in
this chart are based on flow
through a wide-open valve.
If valve is less than fully
open, higher drops and
lower flows will result.
[1] S.T.P. = Standard
Temperature and Pressure
defined at: (60°F and 14.7
PSIA and 15.6°C and 760mm
Hg)
Gas Valves are normally
sized based on inlet
pressure and allowable
pressure drop. See
guidelines at left.
erusserPtelnIsaGporDerusserPdetsegguS
cw"5-cw"3cw"5.1-cw"5.0
iso8-iso4cw"2-cw"1
iso61-iso8cw"5-cw"2
isp3-isp2c
w"01-cw"6
Page 7020 Flow Control Valves
Performance Data
Series “BV” and “CV” Gas Control Valves – Air Service
Note: The capacities and
pressure drops indicated in
this chart are based on flow
through a wide-open valve.
If valve is less than fully
open, higher drops and
lower flows will result.
[1] S.T.P. = Standard
Temperature and Pressure
defined at: (60°F and 14.7
PSIA and 15.6°C and 760mm
Hg)
Air Valves are normally sized to match the combustion air pipe sizing.
Pressure drops of 1" wc to 2.5" wc are typical. If supply pressures are higher
than required, smaller valves can be used, or travel limited to restrict maximum
flow rate.
Flow Control Valves Page 7021
6/11
Dimensions (in inches)
Series “CV” Control Valves
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
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C-B ]1[ H-M ]2[
"2/1
91.426.460.3
61.3 87.1 87.085.1
"4/398.1
"152.389.1126.1
"4/1-183.349.191.196.1
"2/1-1 49.383.413.326.
383.226.118.1
"2
"2/1-2 91.326.360.4 26.496.249.113.2
"3560.313.25.2
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Page 7022 Flow Control Valves
Pipe threads on this page conform to NPT (ANSI Standard B2.1)
Series “BV” Balancing Valves
Dimensions (in inches)
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"2/1
52.1 52.2
61.357.0 52.1"4/3
"1 52.31
"4/1-1 83.183.391.144.1
"2/1-1 18.1 5.226.3 13.165.1
"2 88.126.188.1
"2/1-2 57.25
2.3 26.449.191.2
"3 513.265.2
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Maxon MICRO-RATIO® Valves Operating instructions

Maxon
Brand
Maxon
Model
MICRO-RATIO® Valves
Type
Operating instructions
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