Working principle of different types of valve positioners

2024-10-22

Pneumatic valve positioner accepts standard gas signal as input, such as 20~100kPa gas signal, and adjusts the output gas signal to actuator according to the input signal to control the valve position. Electric valve positioner accepts standard current or voltage signal, internally converts electrical signal to electromagnetic force, outputs gas signal to actuator, with higher precision and stability, can be electronically adjusted and calibrated. Intelligent valve positioner is equipped with CP......

How to repair the sealing surface and improve the airtightness of the valve after a long time of use?

2024-10-09

After long-term use of various valves, the sealing surface of the valve flap and seat will be worn, and the tightness is reduced. Then after the use of the valve, how to ensure the air tightness? Repair, there is a both time-saving and money-saving way to repair the sealing surface is a large and very important work, the main method of repair is grinding, the wear of the sealing surface of the serious, it is the first surfacing by turning process and then grinding.