Types of gate valves

There are many domestic manufacturers of gate valves, and most of them are not uniform in connection size. Mainly divided into the following categories: 1. According to JB/T2203-1999 "Gate Valve Structure Length", the standard valve of the Ministry of Machinery; 2. According to GB/T12221-2005 "Metal Valve Structure Length", the national standard valve; 3. According to American standard valve produced by ASME B16.10-2009 "Face-to-face and End-to-End Dimensions of Valves".

According to the structure of the gate, the gate valve is divided into two types: wedge type and parallel type. There are 3 types of wedge gates: single gate, double gate and elastic gate.

The gate valve is divided into flat gate valve and knife gate valve according to the different structure types.

The working principle of manual gate valve: Turn the hand wheel, and the valve plate connected with the valve stem can be raised or lowered through the advance and retreat of the thread of the hand wheel and the valve stem to achieve the function of opening and closing.

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 valve body lining valves: such as rubber-lined valves, fluorine-lined valves, lead-lined valves, plastic-lined valves, and enamel-lined valves.

Valves of non-metallic materials: such as ceramic valves, glass valves, and plastic valves.