Goole Valve Technology Co.,Ltd
Address: He_yi Industrial Zone,Oubei Town,Wenzhou City,Zhejiang Province,P.R.China
Tel: 86-577-57781015
E_mail: goole4@goolevalve.com
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Structural principle of plug valve
Structural Principle:
A plug valve is a closed or plunger shaped rotary valve that opens or closes by rotating 90 degrees to connect or separate the channel port on the valve plug from the channel port on the valve body.
The shape of its valve plug can be cylindrical or conical. In a cylindrical valve plug, the channel is generally rectangular; In the conical valve plug, the channel is trapezoidal. These shapes make the structure of the plug valve lightweight. It is most suitable as a medium for cutting and connecting, as well as for diverting, but depending on the nature of the application and the erosion resistance of the sealing surface, it can sometimes also be used for throttling.
Working Principle:
A valve with a plug body with a through hole as the opening and closing component. The plug body rotates with the valve stem to achieve opening and closing action. A small plug valve without packing is also known as a "cock". The plug body of the plug valve is mostly a conical body (also known as a cylinder), which forms a sealing pair in conjunction with the conical hole surface of the valve body. Plug valve is the earliest type of valve used, with a simple structure, fast opening and closing, and low fluid resistance. Ordinary plug valves rely on direct contact between the precision machined metal plug body and the valve body to seal, resulting in poor sealing performance, high opening and closing force, and easy wear. They are usually only suitable for low pressure (not higher than 1 MPa) and small diameter (less than 100 mm) applications.
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