For the strength test of the pneumatic butterfly valve, usually put the assembled valve in the pressure test frame, open the valve flap, inject the medium to the specified value, and check whether the valve body and the valve cover are sweating and leaking. Ac Heat Exchanger,Tube Heat Exchanger,Finned Pipe Heat Exchanger,Aluminium Heat Exchanger Suzhou Green New Material Technology Co., Ltd. , https://www.szgreenvip.com
For the strength test of the pneumatic butterfly valve, usually put the assembled valve in the pressure test frame, open the valve flap, inject the medium to the specified value, and check whether the valve body and the valve cover are sweating and leaking. The strength test can also be carried out in one piece. The seal test is only used as a shut-off valve. During the test, the valve stem of the shut-off valve is in a vertical state, the valve flap is opened, the medium is introduced from the lower end of the valve flap to the specified value, and the packing and the gasket are inspected; after being qualified, the valve flap is closed, and the other end is opened to check for leakage. If the butterfly valve, strength and tightness test are to be done, the strength test can be done first, then the pressure is reduced to the specified value of the seal test, and the packing and gasket are checked; then the valve flap is closed, and the outlet end is opened to check whether the sealing surface leaks. . 
The sealing performance test of the butterfly valve shall be introduced into the test medium from the end of the medium flow. The disc shall be opened, the other end closed, and the injection pressure shall be the specified value. After checking the packing and other seals without leakage, close the disc and open the other end to check the butterfly. No leakage at the plate seal is acceptable. As a butterfly valve for regulating the flow rate, the sealing performance test may not be performed.
Marine butterfly valve: marine center type pneumatic butterfly valve.. CG-CQD, marine center type spiral manual butterfly valve CG-CSD2, marine center type worm wheel type manual butterfly valve CG-CSD3, marine center type pneumatic butterfly valve.. CG-CQD, Marine flange center type electric butterfly valve CG-CdD. More marine products consult Wenzhou Yi Nai Pump & Valve Co., Ltd.
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