Pneumatic control valve - structure classification:
According to the basic valve actuation mode can be divided into: straight stroke and Angle stroke two ways.

Pneumatic control valve features:

Simple control quick response intrinsic safety, do not need to take another explosion protection measures.

Pneumatic control valve installation principle:

(1) pneumatic control valve installation position, is apart from the ground request has the certain height, valve and allow a certain space for valve dismantling and repair. For equipped with pneumatic valve positioner of the control valve and the handwheel, must guarantee that operation, observation and easy to adjust.

(2) the valve should be installed in horizontal pipe runs, and fluctuation and piping vertical, typically in the valve which support, guarantee the stable and reliable. For special occasions, need regulator level installed in vertical pipe, also should control valve to support (red regulator except). When installed, want to avoid to valve bring additional stress).

(3) the valve working environment temperature in (- 30 ~ + 60) relative humidity is not more than 95% 95%, relative humidity is not more than 95%.

(4) before and after the valve position should be straight pipe section, the length is less than 10 times the diameter of pipeline (10 d), in order to avoid valve straight pipe section is too short and affect flow characteristic.

(5) the valve size and the process piping not phase at the same time, should adopt reducing pipe connection. To rest in a small-bore valve installation, usable threaded connection. Body fluid direction arrow should and fluid direction.

(6) to set up the bypass pipe. Purpose is to facilitate switching or manual operation, and don't stop of valve repair.

(7) valve before installation to thoroughly remove foreign bodies in the piping, such as dirt, welding slag, etc.