Introduction To Several Gate Plates of Gate Valves

Introduction to several gate plates of gate valves

(1) Wedge single gate valve

①The structure is simpler than that of elastic gate valve;

②At higher temperatures, the sealing performance is not as good as the elastic gate valve or double gate valve;

③Suitable for high-temperature media that are prone to coking.

(2) Elastic gate valve

It is a special form of wedge single gate. Compared with the wedge gate valve, it has good sealing performance at high temperatures, and the gate is not easily stuck after being heated; it is suitable for steam, high-temperature oil, oil and gas and other media, and is suitable for parts with frequent switches. Not suitable for media that is prone to coking.

(3) Double gate valve

① The sealing performance is better than that of the wedge gate valve. If the inclination angle of the sealing surface and the valve seat are not very accurate, it still has good sealing performance;

② After the gate sealing surface is worn, the metal pad at the bottom of the spherical top center can be replaced with a thicker one. Generally, there is no need to surfacing and grinding the sealing surface, which is difficult to achieve with a single gate or elastic gate.

③There are more parts than other types of gate valves;

④ In addition to being suitable for steam, oil and other media, it is also suitable for parts with frequent opening and closing and media with greater wear on the sealing surface. It is not suitable for media that are prone to coking.

(4) Parallel gate valve

①The sealing performance is worse than other forms of gate valves;

②Suitable for media with lower temperature and pressure;

③Except for the gates with fixed plates on the two gates that are not easy to fall off, the gates with two gates fixed with lead wires are easy to fall off and are unreliable in use.

④The processing and maintenance of the sealing surfaces of the gate plate and valve seat are simpler than other forms of gate valves.