What are pneumatic valve inspection before they go out, you know?

Pneumatic valve is powered by compressed air valve rod drives the valve core in the valve body rotation °, can realize full open - Full close action, pneumatic valve tests conducted before they go out in open conditions, the body should be 2 times the internal pressure of valve working pressure value detection; In a closed condition, two side respectively. Times the valve pressure value, no leakage; But the metal seal valve, leakage nor a value greater than the related requirement. Pneumatic valve in the petroleum, petrochemical, chemical, electric power, city construction, the useful, convenient and reliable, anti-aging properties, wear resistant property and reasonable, unique structure, light weight, rapid opening and closing, the sealing surface materials widely used plastic, sealing is good. Pneumatic valve before use need to confirm whether there are impurities inside, welding slag, etc. , must sweep blow impurities, full open to full close several operations, confirm the valve to work normally, comprehensive check all details of a valve, the valve is in good condition. Pneumatic valve is widely used in petroleum, chemical, pharmaceutical, paper making, teaching equipment, light industry, high pressure equipment in industrial automatic control system, centralized control and local control over a long distance.