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Solinst 464 Operating instructions

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Pressure Regulator Replacement
Model 464 Mk3 125 psi
High Quality Groundwater and Surface Water Monitoring Instrumentation
(Page 1 of 2)
Tools and Materials Needed
1. 125 psi Pressure Regulator (Spare) (#112536)
2. 3/32” Allen key
3. Pliers
4. Small vice (recommended)
5. 1/2” wrench
6. 9/16” wrench
7. PTFE tape, or equivalent
8. Pressure source (compressed gas cylinder)
Instructions
1. Turn the Pump Control Unit off. Disconnect the pressure supply
line.
3. Use the 3/32” Allen key to undo the four hex screws on the sides
of the Control Unit.
®Solinst is a registered trademark of Solinst Canada Ltd.
125 psi Pressure Regulator (Spare)
#112536
Hex
Screws
Hex
Screws
Panel
Pressure
Regulator
Knob
Battery
Housing
2. Remove the batteries.
4. Remove the panel from the Control Unit and flip it over to access
the Pressure Regulator.
5. Remove the clear tubing from the fittings on the Pressure Regulator.
To remove the tubing, push down on the collar of the fitting and
pull the tubing out.
6. Flip the panel back over. Use pliers to loosen the panel mount
collar and remove it from the Pressure Regulator knob.
Panel Mount
Collar
Pressure
Regulator
T-Fitting
Brass Tee
Tubing Elbow
More Info | Instructions | Get Quote
Solinst Canada Ltd. 35 Todd Road, Georgetown, Ontario Canada L7G 4R8 www.solinst.com
E-mail: instruments@solinst.com Tel: +1 (905) 873-2255; (800) 661-2023 Fax: +1 (905) 873-1992
November 15, 2022
(#112537) (Page 2 of 2)
7. Pull the Pressure Regulator assembly out from the panel.
8. It is recommended to use a small vice to hold the brass tee of the
Pressure Regulator in place, while removing the other fittings.
9. Using a wrench, remove the tubing elbow and the tubing T-fitting
from the Pressure Regulator.
10. Unscrew the Pressure Regulator from the brass tee.
11. Wrap PTFE tape around the threads on the brass tee, tubing
T-fitting, and tubing elbow.
12. Thread the new Pressure Regulator onto the brass tee.
13. Thread the tubing T-fitting into the opening on the new Pressure
Regulator labelled “IN”.
14. Thread the tubing elbow into the other opening in the Pressure
Regulator. Use the photo as reference for proper orientation.
Note: It any leaks are detected, ensure the fittings are properly
connected and sealed with the PTFE tape. Or, you may need
to cut a small amount of the tubing ends off to ensure a proper
seal in the fittings
18. Once successfully tested, place the panel in the Control Unit and
re-install the four hex screws. Re-install the batteries.
15. Place the new Pressure Regulator with connected fittings through
the panel, and use the panel mount collar to secure it in place.
Ensure proper orientation.
16. Push the tubing firmly back into the correct fittings. Use the photo
as reference for proper connections.
17. Before installing the panel back into the Control Unit, test it to
ensure proper connections have been made and to check for any
leaks. Turn the Pressure Regulator all the way up while testing.
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