On the contrary, when the compressed air enters the two ends of the pneumatic actuator from the B nozzle, the gas pushes the double plug to move straight to the middle, the rack on the piston drives the gear on the rotating shaft to rotate 90 degrees clockwise, and the valve is closed. At this time, the gas in the middle of the pneumatic actuator is discharged with the A nozzle.
From December 9th to 10th, 2021, the quality review expert team visited Zhejiang Aoxiang Automatic Control Technology Co., Ltd. for a 1.5-day field review of Ruian Mayor Quality Award.
Pneumatic actuators can accept continuous air signals and output linear displacement (after power-on/air conversion device, continuous electrical signals can also be received), and some can output angular displacement when equipped with a rocker arm.
The three-way ball valve has two-seat and four-seat sealing structures. The spool channel has two structural forms, L-type and T-type. The rotation angle of the spool is controlled to change the spool hole.The connection state of the channel and the pipe mouth can realize the different combination control of the three branch pipes.
At the production site, after the control system is put into operation, various oscillations of the electric actuator are often encountered. Electric actuators and regulating valves are operating in an oscillating state, which will affect their service life. Therefore, the oscillation phenomenon should be eliminated in the control system. There are many reasons that cause the electric actuator to oscillate. This article analyzes in detail some of the reasons that cause the electric actuator to oscillate and how to eliminate it.
The electric centerline butterfly valve (concentric butterfly valve) adopts a centerline structure design. The center of the valve plate and the center of the valve body are concentric, that is, the shaft center of the valve stem, the center of the butterfly plate and the center of the valve body are all at the same position, forming a mind-centered consciousness.