Wagi Swing Check Valve
The Features of Check Valve
Bolted Bonnet, Swing and Lift disc; Metallic seating surfaces. Bolted cover and pressure seal cover swing and lift disc, threaded Or welded seat ring
Body and Bonnet connection
The body and bonnet of Class 150 – 900 check valves are usually With stud and nuts. And the body and bonnet of Class 1500 – Class 2500 check valves are usually of pressurized seal design.
Stainless steel + flexible graphite wounded gasket is used for Class 150 and Class 300 Check valves; Stainless steel + flexible graphite wounded gasket is used for Class 600 check valve, and joint gasket is also optional for class 600 check valve ; Ring join gasket is used for Class 900 check valve ; Pressurized seal design is used for Class 1500 – Class 2500 check valves.
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. Welded on seat is used of NPS 1/2 – 2 Renewable threaded seat is used for NPS < 8 check valve, and welded on seat can be also optional if being requested by the customer. Welded on seat is used for NPS > 8 carbon steel check valves. For stainless steel check valve, integral seat is usually adopted or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel check valve if being requested by the customer. If the customer have any other. Request about the seat. Please kindly advise before placing the order.