Soft seal high pressure pneumatic valve welding ball pressure test

soft seal high pressure pneumatic welding ball valve before installation should be pressure test, in order to ensure the rigor and security of the pneumatic valve itself.


( Strength test. The strength of the soft seal high pressure pneumatic welding ball valve test using water as medium. In pneumatic valve on both sides of the sleeves on welding and pressure - Booster to the pneumatic ball valve of the nominal pressure. Times, the holding min, for qualified without leakage.


( Leak test. Tight. some trials using nitrogen as medium; The pneumatic ball valve closed. Pressure from the sleeves of pneumatic valve pneumatic valve inside the injection of nitrogen to the ball. Pressure to the pneumatic ball valve of the nominal pressure. No air bubbles in the insertion depth of cm, min for qualified.


soft seal high pressure pneumatic welding ball valve installation requirements:


( Hoisting. Soft seal high pressure pneumatic welding ball valve should adopt the way of correct lifting pneumatic valve, in order to protect the pneumatic valve stem, don't tie chain hoist in hand wheel, gear box or actuators. Pneumatic valve protection caps at the ends of the sleeves don't removed before welding


( Welding. Weld quality must conform to the pneumatic valve class standard, usually a welding cannot fully guarantee all qualified, so when ordered pneumatic valve manufacturers in the pneumatic valve should be required to increase on both ends. M long sleeve tube, once the unqualified weld has enough length to unqualified weld mutilation in pneumatic ball valve and pipe welding and welding, pneumatic valve % should be in full open position, lest the pneumatic ball valve damaged by splashing slag, while ensuring the pneumatic valve internal seal temperature not to exceed degrees Celsius, may, when necessary, appropriate cooling measures


( Pneumatic valve shaft lining. Implement direct buried after laying small pneumatic valve hand well. For all conventional welding pneumatic ball valve is not can be directly buried, and laying large pneumatic valve well, only to form the dangerous confined Spaces, unfavorable to safety operation. And the pneumatic valve body itself and pneumatic valve and pipeline bolt connection part of the electricity will be affected by corrosion, affect the service life of pneumatic valve.