Working medium
water
non-corrosive liquids
steam
air
gases of group 1 and 2
petroleum and petroleum products
The service fluids shall not contain rough impurities.
Technical description
The gate valve is an outside-screw-and-yoke, full bore with flexible wedge and rising stem. The body and the bonnet are made of castings and are connected by a flanged joint. The seating surfaces of the seats and the wedge are made in compliance with API 600. The seat rings are welded into the body. The gate valves are equipped with a back seat. The gate valves are a bi-directional sealing valves. The body-bonnet joint and the packing chamber are sealed with asbestos-free gasket and packing which guarantee a long life service. The requirement for an automatic body cavity pressure relief shall be specified in the purchase order. Pressure relief can be achieved by:
drilling a hole through one disc of the wedge,
special valve incorporated into the wedge,
external bypass,
use of solid wedge.
gate valve types
gate valve function
gate valve diagram
gate valve vs globe valve
gate valve vs ball valve
gate valve parts
gate valve pvc
gate valve working
