Cast Steel Wafter Check Valves

VERVO wafer check valves, also known as dual-plate check valves, have two spring loaded half-moon shaped discs that rotate about their shaft. The disc plates are kept shut by a torsion spring. When fluid flows in a forward direction, the pressure of the fluid causes the disc plates to swing open, allowing flow. The check valve is closed by the spring as soon as flow ceases, before any reverse flow can occur.

VERVO Material:
WCB,LCB,WC6,WC9,CF8,CF8M,CF3,CF3M,CF8C, CN7M

No	Part Name	Carbon steel	18Cr-9NiMo	Carbon Steel
1	Body	A216-WCB	A351-CF8M	A352-LCB
2	Plate	A216-WCB+CR13	A351-CF8M+HF	A350-LCB+CR13
3	Stop Pin	A276-420	A276-304	A276-420
4	Back Spring	A313-304	A313-316	A313-304
5	Hinge Pin	A276-420	A276-304	A276-420
6	Eyebolt (2)	Carbon Steel

Note:l) NPS 8" & larger.

Features
Size:2"~60"
Pressure Rating:Class 150~2500
Wafer/Double Flange/Lug

Specifications
Design: API 594,API 6D,ASME B16.34
Face to Face: API 594,API 6D
End Flange: ASME B 16.5/ASME 16.47
Pressure Temp: ASME 16.34
Test: API598 , ISO5208
Special : NACE MR-01-75