The handwheel, handle on the valve is designed according to the normal human, therefore, on the valve use regulations, does not allow the operator with the lever and long wrench open or close the valve. The handwheel, the diameter of the handle ( Length) < Diameter of 320 mm, allows individuals to operate only, & gt; 320 mm wheel, allowing two people common operation, or allowing a person with the appropriate lever ( Is generally not more than 0. 5 m in length) operation. But the diaphragm valve, clip pipe valve, non-metallic valves are levers or long wrench operation, is strictly prohibited conduct does not allow, close the Industrial Valves. Gate and globe valves, such as closed or open end ( The bottom dead center or the top dead center) Turn 1/4 to 1/2 turn, make the thread a better seal, good operation, in order to avoid the & # 353; Too tight, the damage to the Industrial Valves. Some operators used to use leverage and long wrench operation, think that the bigger the closing force, the better, it's not. This will cause premature valve damage, and even lead to accidents.
Competitiveness policy of Shenzhen Mech Valve Trading Co., Ltd. is about existing clusters as a platform for upgrading microeconomic fundamentals, where structural policies aim to change the industrial composition of an economy more directly.
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