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Vervo forged steel valve

Description of Cast Steel Swing Check Valves

Cast Steel Swing Check Valves
VERVO swing check valve consists of a flap or disc which hangs down in the flow path. With flow in the forwards direction, the pressure of the fluid forces the disc to swing upwards, allowing flow through the valve. Reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve.

VERVO Material:

Structure of Cast Steel Swing Check Valves

Cast Steel Swing Check Valves
No Part Name Carbon steel l1/4cr-1/2mo Carbon Steel
1 Body A216-WCB A217-WC6 A352-LCB
2 Cover A216-WCB A217-WC6 A352-LCB
3 Disc1) A105-CR13 A182-F11+HF A350-LF2+CR13
4 Hinge A216-WCB A217-WC6 A352-LCB
5 Fork Part A216-WCB A217-WC6 A352-LCB
6 Seat Ring A105+CR13 A182-F11+HF A350-LF2+CR13
7 Hinge Pin A276-420 A276-304 A276-420
8 Disc Washer Carbon Steel A276-304 Carbon Steel
9 Disc Nut Carbon Steel A194-7 Carbon Steel
10 Disc Nut Pin Carbon Steel A276-420 Carbon Steel
11 Gasket Spiral Wound(Graphite+304)
12 Stud A193-B7 A193-B16 A320-L7
13 Stud Nut A194-2H A194-7 A194-4
14 Eyebolt(2) Carbon Steel

l) Cast steel disc for NPS 4" and above.
2) NPS 6" & larger.
3) Disc and seat ring may either be solid facing material or a base material equal to or better than the body/bonnet material with facing as shown.

Data table of Cast Steel Swing Check Valves

Size: 2"~56"
Pressure Rating: Class 150 ~2500
BC,Bolted Cover;PSC,Pressure Seal Cover
Renewable Seat Rings
Flange or Butt Welding

Design: API608,API6D,BS5351,ASMEB16.34
Face to FacerASME B 16.10,API 6D
End Flange: ASME B 16.5/BS EN1092/ASME 16.47
BW Flange: ASMEB16.25
Pressure Temp: ASME 16.34
Test: API598,ISO5208,API6D
Special : NACE MR-01-75

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