Relief and Check Valves

Pacseal Hydraulics, Inc.

 

 

relief and check valves


Relief Valves

 

Relief valves are used in hydraulic circuits to protect the downstream circuit from overpressurization by a pump. They are factory set for a specified cracking pressure (i.e. set pressure), and are adjustable or are available with tamper proof wire to inhibit field readjustment. When inlet pressure is reduced by 25% of set pressure, the relief valve reseals.

Relief Valves have a zinc plated carbon steel body and hardened stainless steel sealing components.

 

Relief Valve Illustration

 

 

Note:

A relief valve is a last resort safety device and is not intended to be used as a pressure reducing or regulator valve.




Check Valves

 

Check valves provide unidirectional flow, sealing against reverse flow, and are commonly used on the outlet side of a pump or compressor.

 

Check valves have a zinc plated carbon steel body and hardened stainless steel in-line poppet to provide a metal-to-metal seal for long life in hydraulic oil and lubricated water.

 

Illustration of Check Valve

Note:

Never rely on the check valve as a block valve for downstream maintenance.


Pressure Rating: 5000 psi

Check Valve Part Numbers

Part # Model # Port Size, Female Cv
40-1508 CV-50 1/2" NPT 5
40-1507 CV-100 1" NPT 12