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Types of gate valves

There are many manufacturers producing gate valves in China, and the connection dimensions are mostly not uniform. Mainly divided into the following categories: 1. Mechanical Department standard valves produced according to JB/T 203-1999 "Structural Length of Gate Valves"; 2. National standard valves manufactured according to GB/T 12221-2005 "Structural Length of Metal Valves"; 3. American standard valves manufactured according to ASME B16.10-2009 "Face-to-Face and End-to-Face Size of Valves".

Gate valves are divided into wedge type and parallel type according to the structure of gate plate. Wedge gate has three structures: single gate, double gate and elastic gate.

Gate valves can be divided into flat gate valves and knife gate valves according to different structural types.

The working principle of manual gate valve: turning the handwheel, lifting or dropping the valve plate connected with the stem through the threads of the handwheel and the stem to open and close.

According to the classification of shell/main body materials, gate valves can be divided into:

Metal material valves: such as carbon steel valves, alloy steel valves, stainless steel valves, cast iron valves, titanium alloy valves, Monel valves, copper alloy valves, lead alloy valves, etc.

Metal body lined valves: such as rubber-lined valves, fluorine-lined valves, lead-lined valves, plastic-lined valves, enamel-lined valves.

Non-metallic material valves: such as ceramic valves, glass valves, plastic valves.

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