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VCCB series
Fully Welded Check Valve

Category

  • UHP | Valves | Check Valves
  • Dimensions
  • How To Order
  • Specification
  • Features

Dimensions

 

Part No.End ConnectionDimensions (mm)
InletOutletAB
VCCBU-04T-1/4" UNILOK49.822.2
C-04M-1/4" Male UCR45.722.2
C-08M-1/2" Male UCR52.326.9
C-04F-1/4" Female UCR61.722.2
C-08F-1/2" Female UCR61.726.9
WB-04T-1/4" Tube Butt Weld31.522.2
WB-06T-3/8" Tube Butt Weld31.522.2
WB-08T-1/2" Tube Butt Weld31.526.9


How To Order

UNILOK VCCB series valves are ordered by part number as shown below. 

Example : The following part number,VCCB-04M SL-EP is designated for Clean Check Valve, both 1/4" Male UCR, 316LSS, EP.


VCCBC-04M-SL-EP-
UNILOK
Clean Valves
Valve
Type
Connection
Type
Connection
Size
MaterialSurface
Finish Level
O-RING
Seal Material
Valve TypeConnection SizeMaterials
CWelded Check ValveFractional(Inch) Tube O.D. DesignationDM316LSS-SEMI F20
CBBonded Check ValveTube
O.D.
inch1/43/81/2SL316LSS
mm6.359.5212.7
Connection TypeDesignator04T06T08TSurface Finish Level
UUNILOK Tube FittingBABA - Bright Annealing
C-*MMale UCRUCR Size DesignatorEPEP - Electro Polished
C-*FFemale UCRUCR Size1/41/2
WB-Butt Weld -TubeDesignator0408Seal Material
UCR - Metal Face SealNoneFKM
KFFKM
EEthylene propylene

Specification

Size1/4“ UCR1/4” Butt Weld3/8”, 1/2"
Cv Value0.90.550.9
Max. Working PressureFKM3000 psig (206 bar)
FFKM1000 psig (68 bar)
Max. Working Temperature-10~80°C (14~176°F)
Nominal Cracking Pressure 2 psig (0.14 bar)
Reseal Pressure 2 psig (0.14 bar)
External Leakage
Allowance - He
(Holding Time - Min 1 min)
 1x10-9 atm.cc/s
VCCB Series Check Valve not operated for a certain period of time, initial crack pressure may be higher than the nominal cracking pressure.

Features

 

The body is fully welded, compactly designed, and features minimal dead space. The body material complies with SEMI F-20, "Specification for 316LSS Materials for UHP (Ultra High Purity) Grade Semiconductor Manufacturing Applications." The Elgiloy® spring material provides strong durability and corrosion resistance, ensuring a long cycle life. The valves operate noise-free and offer a broad choice of end connections.

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