2) how to order the pneumatic valve

in general, pneumatic valve in China market price is stable, but slightly down this year, but is very small.
pneumatic valve market is the main problem is:
in the first place, some operators to buy pneumatic valve did not make up, print website, pneumatic valve of well-known brand names and qualified manufacturers causes serious damage to the company's reputation.
2, renovation of pneumatic valve, some operators through the use of paint again after the second sales of pneumatic valves, there are serious security hidden danger of engineering quality.
so, when choosing the most suitable for the application of pneumatic valve should be cautious. In order to avoid ambiguity, should be accurate for each of the pneumatic valve requirements. In the inquiry or order, pneumatic valve should be required to make full and proper instructions.
select pneumatic valve size must be determined and pneumatic valve pipe DN. Pneumatic valve in determining the correct valve material material, should consider the following factors:
the pneumatic valve control fluid fluid temperature range
*
the pneumatic valves are subjected to the pressure range
* may affect the climatic conditions of the pneumatic valve
the pneumatic valve will be abnormal pressure or stress may
must conform to safety standards or piping code
the pneumatic control valve. 。 Each pneumatic valve configuration, to perform a specific function, don't expect a pneumatic valve play the whole pipeline system all functions within the class.
- pressure Temperature rating. In order to satisfy the actual need, please pay special attention to the pneumatic pressure of the valve Temperature rating. It is important to pay special attention to the sealing material and liner material, these materials in a great extent determine the pneumatic pressure of the valve Temperature rating. Specify alternative sealing materials and sedimentary materials to meet or exceed your requirements.
pneumatic valves and connections. Pipeline system integrity, future maintenance, corrosion factors, field assembly, weight and safety, and so on are determined by pneumatic valve and pipeline connection should be considered.
operation mode or operation method according to the pneumatic valve type, size, pressure, temperature, installation environment factors to select the appropriate mode of operation or operation method. Pneumatic valve order

in order, please provide the following information, in order to avoid unnecessary delays, and ensure the purchase of pneumatic valve is, indeed, they need a pneumatic valve.
。 Pneumatic valve size
. Pressure boundary material: castings and components.
。 Pneumatic valve, pneumatic valve: gate by the pneumatic valve, pneumatic valve, check valve control of pneumatic valves, pneumatic ball valve, etc.
。 Terminal connection, if the welding connection, but also provide a connection pipe wall thickness; If the connection flange, flange or complete.
。 Any deviation from standard material: packing, sealing materials, bolts, etc.
。 Any accessories - acid protective layer, locking devices, chain operation, etc.
。 Manual or power actuators, please include technical details of our requirements.
。 In order to convenient order, ensure that the specification.