Instrumentation Check Valves
Series VC31 & VC51


DAWSONS-TECH® Check Valve Series : VC31 is a very compact and robust in construction and designed for unidirectional flow control of fluids and gases for medium pressure (UPTO 3000 PSIG) used in Instrumentation systems



DAWSONS-TECH® Check Valve Series : VC51 is a very compact, robust and heavy duty design for unidirectional flow control of Fluid and Gases for high pressure (UPTO 6000 PSIG) used in Instrumentation systems.


Features :
  • Available in Material SS316L.
  • Material Traceable to certified material test report.
  • Back stopped Poppet design to minimum spring stress.
  • ‘O’ Ring bonded Poppet seat provides leak tight seal.
  • Provides large flow, minimum of chatter and fluctuation.
  • Cracking pressure : 1/3, 1, 5, 10, 25, 50 and 100 PSIG.
  • Series VC31 is suitable for Vacuum and medium pressure Fluid / Gas applications.
  • Series VS51 is suitable for Vacuum and High Pressure Fluid / Gas applications.
  • Every Valve is pressure tested.

Product Range and Operating Parameters :
  • Pressure Rating: (Check Valve Series VC31) : UPTO 3000 PSIG (207 Bar) at CWP
  • Pressure Rating: (Check Valve Series VC51) : UPTO 6000 PSIG (413 Bar) at CWP
  • Temperature Rating: UPTO 198o C Fluorocarbon ‘O’ Ring
  • End Connections:
    • Fractional: 1/4" to 1” Tube OD
    • Metric: 6mm to 25mm Tube OD
    • Tube OD Pipe Thread : 1/4" to 1” Male / Female BSPP / BSPT / NPT
    • Metal Gasket Face Seal : 1/4" to 1”
    • ‘O’ Ring Face Seal : 1/4" to 1”
Applications :
  • Gas, Liquid, Fluid Handling.
Type Test Approvals :
The design of DAWSONS-TECH Check Valve Series : VC31 & VC51 has been tested for Hydrostatic Proof and Burst Test in accordance with MSS SP-99-2016a Clause 5.5 & 5.6.

Testing :
  • Standard Test - Each Valve is pressure tested with Nitrogen at 1000 PSIG (69 Bar) for leakage at the seat and packing.
  • Optional Hydrostatic Test - This Test is performed with De-ionized water at 1.5 times the working pressure.
  •  
    Certification :
    The certificate to 3.1 acc. to EN10204 for Valves Body Material and pressure test will be provided on request.

    Material of Construction : Series VC31
    Sr. No.DescriptionMaterial
    1Inlet BodySS316
    2‘O’ RingFluorocarbon
    3PoppetSS316
    4SpringStainless Steel
    5‘O’ RingFluorocarbon
    6Outlet BodySS316
    Material of Construction : Series VC51
    Sr. No.DescriptionMaterial
    1Inlet BodySS316
    2Bonded PopetSS316
    3PusherSS316
    4‘O’ RingFluorocarbon
    5Backup RingPTFE
    6SpringSS302
    7Outlet BodySS316