Tightness and strength test:
(1) Strength test, No leakage is observed to prove that the valve body strength is qualified.
(2) Sealing test: nitrogen is generally used as the medium; Close the pneumatic ball valve, and then inject nitrogen into the pneumatic ball valve from the pressure test valve on the sleeve. The pressure rises to 1.1 times of the nominal pressure of the pneumatic ball valve, and the middle chamber pressure relief valve is connected with the hose to the water container for detection. The insertion depth is 1cm; If there is no bubble within 5min, the valve sealing is qualified.

Performance analysis of pneumatic butterfly valve
The stainless steel pneumatic butterfly valve is a flexible element with one or more layers of steel wire or steel belt net sleeves outside the stainless steel bellows, and two ends are equipped with joint media. Low temperature or ultra-low temperature media, water, steam, oil and other media in high temperature environment, and pipelines requiring vibration reduction or noise elimination, specification: ￠ 4 - ￠ 600 pressure 0.6MPa-25.0MPa Executive specification: GB/T14525-93. As a flexible pressure resistant pipe fitting, pneumatic butterfly valve is used in the liquid escort system to compensate for the mutual displacement of the connecting end of the pipeline or machine and equipment, absorb the vibration energy, and can play the role of vibration reduction, noise reduction, etc. It has many advantages such as good flexibility, light weight, corrosion resistance, fatigue resistance, and temperature resistance. Escort corrosive chemical media or organic solvents, high-temperature gas, hot oil and other high-temperature media
Stainless steel wire braided hose, metal corrugated pipe for fluid escort, stainless steel pump shock absorption hose, stainless steel fire hose, stainless steel corrugated compensator, stainless steel corrugated pipe for gas machinery. The product has the advantages of good flexibility, corrosion resistance, fatigue resistance, temperature resistance, shock absorption and noise reduction, strong sealing, long service life, etc. It is widely used in textile, chemical fiber, printing and dyeing, petroleum, chemical industry, steel, gas, air conditioning, automobile, fire protection, urban water supply, construction, metallurgy and petrochemical industries.