Pneumatic regulating butterfly valve is through the input control signal, the use of gas source drive to adjust the media plate opening, so as to control the size of the media flow of adjustable pneumatic amusement, mainly by the media valve and pneumatic actuator, valve positioner and other accessories supporting the combination of pneumatic regulating media valve according to the automation system in the broad door positioner input 4-20MA signal, through the 0.4-0.7MPa inlet to adjust the size of the valve opening, so as to realize the adjustment of the pipeline media flow, pressure, temperature and liquid level and other process parameters, is a commonly used devices to regulate the flow and cut off the fluid. Valve opening size, so as to realize the pipeline medium flow, pressure, temperature and liquid level and other process parameters of the adjustment, is to regulate the flow and cut off the fluid commonly used devices. Pneumatic regulating medium valve can reject the working conditions need to choose different seals (soft seal and hard seal), in order to meet the different requirements of use, widely used in chemical industry, environmental protection, air, water, gas, steam and corrosive media containing pipeline.
Pneumatic regulating butterfly valve principle.
Pneumatic regulating medium valve actuator is divided into single-acting and double-acting, double-acting for the gas open and close type, open and close the need for a gas source pressure, out of gas to maintain the original position, and single-acting for the gas off spring reset type and the gas open pop-ups such as automatic homing, generally divided into the first open and normally closed type, which is live for the requirements of the scene of the occurrence of a dead end or no gas source, the smoke door needs to be quickly shut off the group or open the place, with an emergency cut off can be circulated.
