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COMPRESSOR PROTECTIVE DEVICES

The function of a Reservoir Pressure Valve is to vent excess

pressure to the suction line in order to maintain a positive pressure

differential between the Oil Reservoir and Compressor.

Applications

A Reservoir Pressure Valve is used in a Low Pressure Oil Management

System. It is used to vent pressure in the Oil Reservoir while still maintaining

a positive pressure differential between the Oil Reservoir and the

compressor crankcase. This positive pressure ensures an adequate oil

supply to the Oil Level Regulators. The inlet of the valve should be

connected directly to the Oil Reservoir and the outlet should be piped to

suction pressure.

Reservoir Pressure Valves are suitable for use with HCFC and HFC

refrigerants, and their associated oils, as well as other industrial fluids non-

corrosive to brass, steel and Teflon.

Main Features

Proven design

SAE flare connections

Two different pressure settings

Premium quality Teflon seal

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Technical Specifications

Maximum working pressure = 500 PSI (34.5 Bar)

Allowable operating temperature = +15°F to +250°F (-10°C to +121°C)

The Reservoir Pressure Valves are USR and CNR recognized by

Underwriters Laboratories, Inc.

RESERVOIR PRESSURE VALVES

Materials of Construction

The valve body components are made from brass, the spring from stainless

steel and the seal from Teflon.

Part No

Pressure Setting

(lbs)

Conn Size (Inch)

Dimensions (inch)

Weight (lbs)

Inlet

Outlet

A

S-9104

5

3/8 SAE Flare Female

3/8 SAE Flare Male

2.51

0.29

S-9104H

20

3/8 SAE Flare Female

3/8 SAE Flare Male

2.51

0.29

Œ



Inlet

Outlet

Selection guidelines

The S-9104 and S-9104H models provide 5 lbs. and 20 lbs. pressure

differential respectively

A higher pressure differential will increase the oil flow rate from the Oil

Reservoir back to the compressors.

The user should select a model taking into account individual compressor

crankcase pressures along with the differential pressure range of the Oil

Regulators.

Multiple Reservoir Pressure Valves may be installed in series for additional

pressure requirements. Example: Installing (2) S-9104 Reservoir Pressure

Valves would create a 10 PSI (0.7 Bar) differential.

HENRY

A

1

2

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