Model 5332B-2PP Relief Valve

Relief Valve


Circle Seal Controls Model 5332B-2PP Relief Valve

Catalog literature: Relief Valves Catalog.pdf Acrobat DC

The Circle Seal Controls model 5332B-2PP relief valve provides a combination of high cracking pressures, absolute leak-proof sealing when closed, and virtually maintenance-free dependability in a relatively small, lightweight package.

How it Works


  • Zero leakage: dead-tight sealing well above 95% of cracking pressure; system pressure on poppet increases sealing efficiency with increasing pressure until cracking pressure has been reached
  • Positive resealing: repeatedly reseals dead-tight only slightly below cracking pressure
  • Virtually no pressure rise with increasing flow: design utilizes system back pressure on poppet to increase lift providing excellent flow characteristics with little or no pressure rise
  • Cracking pressure accuracy: valves crack repeatedly at preset pressure with minimum variation; o-ring breakaway friction is overcome before valve opens
  • No chatter or squeal: completely balanced; smooth, quiet operation at all flows; no chatter or squeal from pressure changes or surges downstream
  • Externally adjustable: external adjustment permits changes in cracking pressure to meet circuit requirements; interchangeable springs permit change of cracking pressure range
  • Versatile: various materials for both body and seals; PED certifications and CE marking available for most models

Technical Data:

  • Cracking pressure: 420-10,500 PSIG
  • Body material: Brass
  • Seal material: Viton
  • Poppet material: Polyimide (Vespel SP-21)
  • Connections: 1/4″ FNPTxFNPT
  • Temp range: -20 to +350F


  • “B” dimension (height): 4.88″ (for cracking pressures 420-3,074 psig); 5.78″ (for cracking pressures 3,075-10,500 psig)
  • “C” dimension (hex): 1/2″
  • “F” dimension (hex): 1.50″
  • “G” dimension (diameter): 1.38″
  • “H” dimension (hex): 1.25″
  • “K” dimension (diameter): 0.125″
  • Weight (lbs.): 1.6

5332B-2PP Relief Valve