How to choose pneumatic pneumatic valve, nice and suitable pneumatic valve?

in the pneumatic valve is a fluid conveying system control unit, a cut-off, regulation, guide, to prevent the reverse flow, voltage regulator, the leakage of the shunt or overflow and wait for a variety of different functions. It can be applied to many fields, use is also very extensive. According to different material of pneumatic valves, pneumatic valves can be divided into cast iron cast steel pneumatic valve, pneumatic valve, stainless steel, chrome molybdenum steel pneumatic valve molybdenum chrome vanadium steel pneumatic valve, pneumatic valve, dual phase steel plastic pneumatic valve, non-standard custom-made pneumatic valve and so on. Pneumatic valves of different material, different USES of the price is different, there are more than a dozen blocks, dozens of pieces, more than one hundred, hundreds of, also have thousands of tens of thousands of. So pneumatic valve before the choose and buy, what we need to know? How to choose suitable pneumatic valve? First of all, to clear the pneumatic valve used in equipment or devices, determine the pneumatic valve can be work under what conditions, what is the suitable medium, how much is the working pressure and temperature, etc; Second, know and nominal size of the pneumatic valve connection pipe and connection mode: flange, thread, welding, etc. ; Third, to determine the operation way of pneumatic valves: manual, electric, magnetic, pneumatic or hydraulic and electric hydraulic linkage, etc. ; Fourth, according to the pipeline medium, working pressure, working temperature to determine the selected pneumatic valve shell and internal parts of material: cast steel, carbon steel, stainless steel, alloy steel, stainless acid-resistant steel, copper alloy, etc. ; Fifth, choose the types of pneumatic valves, pneumatic valve type, parameters and geometric parameters of the selected pneumatic valves, such as: the structure and size, length, the flange connection open and closed after the size of the pneumatic valve height direction, bolt hole size and the number of connections, the pneumatic valve installation dimensions, etc. In addition, when choosing baotou pneumatic valves, sometimes not only to undertake choosing according to more than a few, but also follow to choose the basis of a pneumatic valve: first, to clear the purpose of the pneumatic valve, we choose to use conditions and operation control, pneumatic valve specifications and categories, should accord with the requirement of pipe design documents, working pressure is greater than or equal to the pipe work pressure. Second, understand clearly the nature of the working medium, working pressure, working temperature, corrosion performance, whether or not containing solid particles, medium is toxic and is flammable, explosive medium, medium viscosity, etc. Third, understand the requirement: the characteristics of the pneumatic valve fluid flow resistance, discharge capacity, flow characteristic, protection class, etc. Fourthly, clarify the installation size and shape size requirement: nominal diameter, and pipeline connection and the connection size restrictions on the size or weight, appearance, etc. Fifthly, product reliability, service life of pneumatic valves and electric devices of explosion-proof performance as well as some additional requirements. After watching the above considerations, I believe you should think to choose a suitable own pneumatic valve prices also suitable pneumatic valve will become easier. Sincerely hope the above interpretation can help everyone can correct the choose and buy of pneumatic valve.