An elastic sphere obtains elasticity by opening an elastic groove at the lower end of the inner wall of the sphere. When closing the channel, use the wedge head of the valve rod to expand the ball and compress the valve seat to seal. Loosen the wedge head before rotating the ball, and the ball will return to its original shape, so that there is a small gap between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface.

What is the scope of application of explosion-proof pneumatic butterfly valve
Explosion proof pneumatic butterfly valve receiving is a special type of receiving. Its main function is to avoid excessive rated stress or difficult connection when some steel pipes are used for direct connection when laying explosion-proof electrical lines. In this case, explosion-proof flexible receiving should be selected according to the rules.
Explosion proof pneumatic butterfly valve is suitable for explosion-proof flexible pipe in Zone 20, 21 and 22 of combustible dust environment, also known as explosion-proof pneumatic butterfly valve, which is suitable for IIB, IIC, T1-T6 explosive mixture sites. It is used for connection of incoming and outgoing lines of explosion-proof electrical equipment or connection of steel pipe wiring in places where it is difficult to detour. Explosion proof pneumatic butterfly valve structure The two ends of the hose are metal thread unions, the local part of the pipe body is a pneumatic butterfly valve, the outer layer is sandwiched with high-quality rubber and reinforced nylon hose sheath, and the sandwich steel wire woven mesh pipe is composed of three ways. This product has the advantages of flame resistance, oil resistance, corrosion resistance, water resistance, wear resistance, aging resistance, excellent flexibility, solid structure, reliable operation, etc. It is generally 5007001000 long.
Scope of application:
1. Applicable to risk sites in Zone 1 and Zone 2;
2. Applicable to Class IIA and IIB explosive gas environment;
3. It is applicable to Zone 20, 21 and 22 of combustible dust environment;
4. Applicable to explosive gas mixing temperature: T1~T4;
5. It is widely used for oil exploration, oil refining, chemical, military and other risk environments, and for operations and scene lighting in offshore oil platforms, oil tankers and other risk areas