Gate valve type

There are many domestic manufacturers of gate valves, and most of the connection sizes are not uniform. Mainly divided into the following categories: 1. Standard valves produced by the Ministry of Machinery according to JB/T2203-1999 "Structure Length of Gate Valves"; 2. National standard valves produced according to GB/T12221-2005 "Structure Length of Metal Valves"; 3. American standard valves produced by ASME B16.10-2009 "Face-to-face and end-to-end dimensions of valves".

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

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

The working principle of the manual gate valve: Turn the handwheel, and through the advance and retreat of the thread of the handwheel and the valve stem, the valve plate connected to the valve stem is lifted or lowered to achieve the opening and closing effect.

According to the classification of shell/body material, 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, and enamel-lined valves.

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