relief valves

 

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

Relief Valves are manufactured with zinc plated carbon steel bodies with hardened stainless steel sealing components.

 

Relief Valve Illustration

 

 

 

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

 

 

Relief Valves

Ports: ¾" NPT: Inlet - Male; Outlet - Female

Cv = 2.0

For tamper proof option, add "-TP" to the part number

Download Installation Drawings by Clicking on Part# in Tables Below
Part # Model # Working Pressure Set Pressure
40-1864
RV-1250
1000 psi
1250 psi
40-1647
RV-1750
1500 psi
1750 psi
40-1865
RV-2250
2000 psi
2250 psi
RV-3300
3000 psi
3300 psi
40-1648
RV-5500
5000 psi
5500 psi

 

Check Valves

 

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

 

Illustration of Check Valve

 

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

 

 

 

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

 

Check Valve

Pressure Rating: 5000 psi

Part #
Model #
Port Size, Female Length (inches) Weight (lbs) Cv
40-1508
CV-50
1/2" NPT
3.73"
0.6
5
40-1507
CV-100
1" NPT
4.88"
2.1
12