A check valve is a type of control valve that controls pressure on production vessels and the pipeline system releases upstream pressure when a designated set point is reached. The disc of valve open or close by medium flow is called a check valve which is a kind of automatic valve for a one-way flow […]
Slab gate valve and wedge gate valves are all designed for use in power, oil and gas industry applications. They are the main and commonly used types of gate valves. They have the similar structure form the appearance, when fully open, they do not have a bore through the gate itself and the gate retracts […]
The Parallel Slide Gate Valves are mainly used in the field chemical, petroleum, natural gas designed to provide isolation and transmission of flow in a piping system or a component when closed, sometimes can be installed in the pump outlet for regulating or control of flow. It’s characterized by compact structure, reliable closing and good […]
The ball valve has been widely used in industrial applications due to its small flow resistance, a wide range of pressure and temperature use range, good sealing performance, short opening and closing time, easy installation and other advantages. The ball is an important part that plays a key role in the opening and closing function […]
API 6D “specification for piping and pipeline valves” and API 608 ” specification for flanged, threaded and welded metal ball valves” provide detailed requirements for ball valves in terms of structural design, performance requirements, test methods and other aspects. API 6D and API 608 constitute together a complete specification of ball valves in the petrochemical […]
Valve packing is a kind of dynamic sealing structure which is installed between the valve stem and the packing box of the valve cover to prevent outside leakage. Packing material, reasonable packing box structure and installation methods ensure the valve reliable sealing performance. There are various valve sealing packing materials are available and different packing […]