Attention back pressure pneumatic valve of choose and buy

back pressure pneumatic valve when the choose and buy, should pay attention to check. When buy, what are the place to pay attention to? To introduce below small make up to you.
, pneumatic valve of the relevant information is complete. Medium pressure before, pneumatic valve, pneumatic valve set pressure, the maximum flow per hour, after that the pneumatic valve dimensions, connection methods, specifications, maximum stroke, open stroke, flow control, pressure shake ( Accuracy) , corresponding than pressure, temperature, maximum temperature tolerance, pneumatic valve body material, pressure rating, internal leakage rate, internal structure, operation principle, pneumatic valve installation and other relevant technical data.
view, pneumatic valve. Pneumatic valve should be done before they go out the following view: pneumatic valve in open cases, pneumatic valve body should receive 2 times the internal pressure of pneumatic valve working pressure value view; On both sides of the pneumatic valve in the closed case, accept separation: times of pneumatic valve pressure value, no leakage; But the metal seal butterfly pneumatic valve, the leakage value is not greater than the demand.
, pay attention to packaging and shipping. Pneumatic valve is a device, pneumatic valve packing is should not be ignored, small pneumatic valve should strive to container shipping, large diameter must complete the corresponding packing pneumatic valve, pneumatic valve to ensure integrity in the long distance transport. Flange should add boards when necessary, maintaining the sealing surface is not damaged.
, in order to check the contract matters whether have changed and whether conform to the requirements, prevent subsequent in some unnecessary questions.
back pressure pneumatic valve to choose pay attention to the above points, ensure the safety and quality of back pressure pneumatic valve.