Pneumatic control valve is very important and very common in industrial production using electrical control equipment, it is working properly or not is directly related to production smoothly or not. At present, with the constant progress of pneumatic control valve technology, pneumatic control valve manufacturers and species more and more, function also is different, we must first check before buying used equipment parameters in which one will be confirmed. The arrival of the goods before installation inspection in advance, the best look at whether meet the purchase requirements and design requirements. Pneumatic control valve of each technology should meet the design requirements, at the time of the arrival of the goods inspection check should focus on the following aspects: the first is the body and internal parts specifications, which include: Industrial Valves type, valve type, nominal diameter, the seat size, form, flow characteristics, valve core leakage level, body material, valve core material, the seat material, CV value, the flange size and sealing surface on a standard scale, etc. , as long as find it contains the same content determination of conformity with design to the design and approval. Second part is the executing agency, should check the actuator model, type, form, spring range, gas supply pressure, etc. Also check the locator part, the main check locator input signal, air pressure, size and level of explosion-proof electrical and gas source interface, including explosion-proof level shall not be lower than design level requirements. Is the last one by one, check the attachment, according to the design of the pneumatic control valve technical requirements carefully clean up the various accessories, such as the filtering pressure reducing valve, valve position switch, electromagnetic valve, the handwheel institutions, special tool. The above content can by cleaning up of inspection, measuring instruments, check the nameplate and dedicated testing means ( Materials such as flange and bolt through the spectrum analysis to identify) Methods to achieve.
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