Structure and selects the features of various kinds of pneumatic valve

there are many kinds of pneumatic valves, but according to its motion characteristics are divided into two categories, namely, driven by pneumatic valve and automatic pneumatic valves.
is driven by pneumatic valve by hand control or other power control of pneumatic valve. Such as stop pneumatic valve, throttle valve ( Needle type pneumatic valve) , pneumatic valve, cock pneumatic brake valve, etc. , all belong to this type of pneumatic valve.
pneumatic valve is automatically with the aid of flow, pressure or temperature parameters of the medium itself changes and action of pneumatic valve itself. Such as check pneumatic valve ( Pneumatic valve, single flow pneumatic non-return valve) , security, pneumatic valve, floating ball valve, pneumatic valve, decompression ran climate action valve and drain, etc. , are automatic pneumatic valves.
project and the nominal pressure of the pneumatic valve pipe by the GBJ - The standard is divided into: low voltage MPa. Steam pipe P& 通用电气; MPa, working temperature & amp; 通用电气; ℃ when promoted to high pressure. Generally water, warm engineering are all low pressure systems, large power station boiler and various industrial pipeline in medium voltage, high voltage or super high pressure system.
just cold and hot water, steam and other general line of the commonly used pneumatic valves, for other industrial pipeline for conveying medium is different, have different requirements, should be chosen according to the requirements of the pneumatic valve.