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. They are factory set for a specified cracking pressure (i.e. set pressure), and are adjustable or available with tamper proof wire to inhibit field adjustment.

 

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.


 



RVS-75


  • Reliable ShearFlo metal-to-metal sealing technology with stainless steel sealing components.
  • Multi-cycle repeatability reduces downtime and maintenance costs.
  • Meets API-16D requirements, resets within 25% of set pressure after a pressure relieving function..
  • Adjustable set pressure from 1000 to 5500 psi.
  • Dual outlets provide 50 gpm when fully open and flowing directly to tank. Flow capacity will vary

      depending on downstream piping and inlet pressure.


Ports: ¾"  NPT Female (1-Inlet, 2-Outlets)

Cv: 6.0 Dual Outlet, Rated Flow: 50gpm

Cv: 3.0 Dual Outlet, Rated Flow: 25gpm

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


Part # Working Pressure Set Pressure
40-2884-10 1000 psi 1100 psi
40-2884-15 1500 psi 1650 psi
40-2884-20 2000 psi 2200 psi
40-2884-30 3000 psi 3300 psi
40-2884-40 4000 psi 4400 psi
40-2884-50 5000 psi 5500 psi


 

RV-75

 


  • Hardened 400 series stainless steel ball and seat sealing components.
  • Zinc plated carbon steel body and thread guard.
  • Meets API-16D requirements, resets within 25% of set pressure after a pressure relieving function.
  • Adjustable set pressure from 1000 to 5500 psi.
  • Single outlet provides 20 gpm when fully open and flowing directly to tank. Flow capacity will vary

    depending on downstream piping and inlet pressure.


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

Cv: 2.0,  Rated Flow: 20gpm

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


Currently available installation drawings are indicated in blue. Click on link to download
Part # Model # Working Pressure Set Pressure Repair Kit Part#
40-1864 RV-1250 1000 psi 1250 psi 40-1708
40-1647 RV-1750 1500 psi 1750 psi 40-1708
40-1865 RV-2250 2000 psi 2250 psi 40-1707
40-1646 RV-3300 3000 psi 3300 psi 40-1707
40-1648 RV-5500 5000 psi 5500 psi 40-1707

 


Check Valves

 

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

 

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.

 

Illustration of Check Valve

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


Check Valve Part Numbers

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