The seal formed by the semi pneumatic ball valve is spherical seal, so Q=Q | F+QQ=qMF (DMW _DMN) (?) QMJ=(DMN+b) P ^, r is the actual specific pressure on the g sealing surface in the formula of "DMW+DMN" nb, the necessary specific pressure on the MPag sealing surface, the allowable specific pressure on the MPa [q] sealing surface, the total force on the MPaQ sealing surface, the side surface area on the NM sealing belt, Mm2Q is the static pressure of the medium acting on the sealing surface, the force acting on the NQ MJ sealing surface when reaching the required specific pressure. N6 is the width of the sealing belt, the half angle of the contact between the mma sealing surface and the spherical surface, and the friction coefficient of the sealing surface of (.) Plant M is the medium pressure, MPa; Inner diameter of sealing surface, mmD, outer diameter of sealing surface, mm? The dynamic and static sealing structure of the valve stem and the fixed mandrel is to ensure that there is no dynamic and static leakage point in the structure of the valve, and to ensure the safety of the service environment of the valve, which is particularly important for the transportation of high temperature, high pressure and harmful media.

Why use stainless steel pneumatic butterfly valve?
The advantages of stainless steel pneumatic butterfly valve are as follows:
1. Sensitivity between pitches.
2. It has good scalability, no blocking and stiffness.
3. Light weight, good divergence of caliber.
4. Good flexibility, repeated bending and flexibility.
5. Good corrosion resistance and high temperature resistance.
6. Anti rat bite, good wear resistance, and avoid abrasion of internal wires.
7. It has strong bending resistance, tensile property and lateral pressure resistance.
8. Soft and smooth, easy to position the threading device.