- Design features: Bolted cover (BC); swing or lift type disc; metallic seating surfaces
- Seat: for carbon steel check valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS <10 check valves, and welded on seat can also be optional if requested by customers. Welded on seat is used for NPS > 12 carbon steel gate valves. For stainless steel check valve, integral seat is usually applied, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel check valve if requested by customers.
- The body and bonnet of Class 150 – Class 900 check valves are generally fastened with studs and nuts. And the body and bonnet of Class 1500 – Class 2500 check valves usually employ a pressure seal design.
- Body-to-cover joint – stainless steel + flexible graphite wounded gasket is used for Class 150 and Class 300 check valve; stainless steel flexible graphite wounded gasket is used for Class 600 check valve, and ring joint gasket is also optional for Class 600 check valve; ring joint gasket is used for Class 900 check valve; pressure seal design is used for Class 1500 – Class 2500 check valves.
BODY MATERIAL
- Carbon Steel
- 316 CF8M
- 304 CF8
- Alloy
- LF2/LCB
- Duplex
TRIM MATERIAL
- Stainless Steel
- Chrome Trim
- 410 trim
- Hard 410
- 410 hard faced
END CONNECTIONS
- ANSI 150, 300, 600
- Socket weld
- Female NPT
- Butt weld sch 10, 40, 80
- Extended butt weld sch 10, 40, 80, 160
- Female NPT x socket weld
- Extended socket weld
- Variety of body materials, trim materials and end connections
