Check Valves

Check Valves Series : VC51

DAWSONS-TECH Check Valve Series : VC51 is a very compact, robust and heavy duty design and unidirectional flow control of fluids and gases for high pressure (UPTO 6000 PSIG) Instrumentation system. It is used in various applications where high integrity leak rates and re-sealing capabilities are desired.

Features
  • 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.
  • Variable cracking pressure: 1/3, 1.5, 10, 25 and 100 PSIG.
  • Suitable for Vacuum and high-pressure applications.
  • Available in Material SS316L.
  • Every valve is factory tested.

OPERATING PARAMETERS
  • Pressure Rating: UPTO 6000 PSIG (408 Bar) at CWP
  • Temperature Rating: UPTO 198o C with Viton ‘O’ Ring
  • End Connections:
    • Inch 1/4" to 1” Tube OD
    • Metric: 6mm to 25mm Tube OD
    • Pipe Thread: 1/4" to 1” Male / Female BSP / BSPT / NPT
    • Face Seal: 1/4" to 1”
    • ‘O’ Ring Face Seal: 1/4" to 1”
APPLICATIONS
  • Gas, Liquid, Fluid Handling.
MATERIAL OF CONSTRUCTION:
Sr. No.DescriptionMaterial
1Inlet BodySS316
2Bonded PopetSS316
3PusherSS316
4‘O’ RingViton
5Backup RingPTFE
6SpringSS302
7Outlet BodySS316
TEMPERATURE & PRESSURE RATING
Material SizeSS316L
1/8” to 1/2" 6mm to 12mm3/4" & 1” 22mm & 25mm
Temperature Fo (Co)Working Pressure, PSIG (Bar)
-10 (-23) to 100 (37)6000 (413)5000 (344)
200 (93)5160 (355)4290 (296)
250 (121)4910 (338)4080 (281)
300 (148)4660 (321)3875 (267)
400 (204)4280 (295)3560 (245)

CRACKING AND RESEAL PRESSURE
Cracking Pressure*Cracking Pressure RangeReseal Pressure**
PSIG (Bar)PSIG (Bar)PSIG (Bar)
1/3 (0.02)UPTO 3 (0.2)UPTO 6 (0.4) Back Pressure
1 (0.06)UPTO 4 (0.27)UPTO 4 (0.27) Back Pressure
5 (0.34)3 to 9 (0.20 to 0.62)UPTO 2 (0.13) Back Pressure
10 (0.68)7 to 15 (0.48 to 1.0)3 (0.2) or more Inlet Pressure
25 (1.7)20 to 30 (1.3 to 2.0)17 (1.1) or more Inlet Pressure
* CRACKING PRESSURE
  • The differential pressure between the inlet and outlet, at which an initial flow is passing through the Valve.
    ** RESEAL PRESSURE
    • The differential pressure between the outlet and inlet, at which no flow is passing through the Valve.

      TECHNICAL DATA
      Connection SizesCracking Pressure PSIG (Bar)Max. Flow Coefficient (Cv)Back Pressure at 70oF (20oC) PSIG (Bar)
      1/8, 1/4, 6mm1/3 (0.02), 1 (0.06), 5 (0.34), 10 (0.68) & 25 (7.1)0.676000 (408)
      3/8, 1/2, 8mm - 12mm1.806000 (408)
      3/4, 1, 22mm, 25mm4.75000 (344)
       
       
      CHECK VALVE SERIES: VC51  
      End ConnectionsDimensions in mmA/FPressure Rating PSIG (Bar)Part No.
      InletOutletAB
      1/4" Male Face Seal58.026.411/166000 (413)VC51-FS4
      1/2" Male Face Seal69.231.213500 (241)VC51-FS8
      3/4" Male Face Seal76.145.41-5/83000 (206)VC51-FS12
      1/4" ‘O’ Ring Face Seal50.426.411/166000 (413)VC51-ORF4
      1/2" ‘O’ Ring Face Seal59.831.216000 (413)VC51-ORF8
      3/4" ‘O’ Ring Face Seal73.645.41-5/85000 (344)VC51-ORF12
      1" ‘O’ Ring Face Seal73.645.41-5/85000 (344)VC51-ORF16
      1/4" Male NPT55.026.411/166000 (413)VC51-MM4N
      3/8" Male NPT60.031.216000 (413)VC51-MM6N
      1/2" Male NPT69.231.216000 (413)VC51-MM8N
      3/4" Male NPT83.545.41-5/85000 (344)VC51-MM12N
      1" Male NPT93.345.71-5/85000 (344)VC51-MM16N
      1/4" Female NPT54.1-11/166000 (413)VC51-FF4N
      3/8" Female NPT64.8-15000 (344)VC51-FF6N
      1/2" Female NPT83.6-1-1/164600 (316)VC51-FF8N
      3/4" Female NPT90.1-1-5/84300 (296)VC51-FF12N
      1" Female NPT97.3-1-5/84100 (282)VC51-FF16N
      1/4" Tube OD61.826.411/166000 (413)VC51-TT4
      3/8" Tube OD70.031.216000 (413)VC51-TT6
      1/2" Tube OD75.331.216000 (413)VC51-TT8
      3/4" Tube OD89.545.41-5/85000 (344)VC51-TT12
      1" Tube OD98.545.41-5/84700 (323)VC51-TT16
      6mm Tube OD61.826.411/166000 (413)VC51-TT6M
      8mm Tube OD68.531.216000 (413)VC51-TT8M
      10mm Tube OD71.131.516000 (413)VC51-TT10M
      12mm Tube OD75.331.516000 (413)VC51-TT12M
      22mm Tube OD88.545.41-5/85000 (344)VC51-TT22M
      25mm Tube OD98.545.41-5/84700 (323)VC51-TT25M
        Dimensions are for reference only and subject to change without notice.