Pneumatic regulating butterfly valve is a valve (valve plate) rotating around a fixed axis perpendicular to the channel. It consists of a piston type double action or single action (spring return type) pneumatic actuator and a butterfly valve. It is a rotary high-performance regulating or shut-off valve, equipped with electric, pneumatic valve positioner or solenoid valve, air filter pressure reducer, limit switch (valve position indicator), It can realize the proportional regulation and two position cut-off control of the fluid medium in the process pipeline, so as to achieve the automatic control of the flow, pressure, temperature, liquid level and other parameters of the fluid medium.

Do you know what causes the failure of pneumatic butterfly valve?
Pneumatic butterfly valve, also known as metal soft joint, is mainly composed of bellows, steel wire mesh and flange plates at both ends. Its function is to reduce vibration and noise. What are the reasons for the failure of pneumatic butterfly valve? I have summarized two reasons. Here is a brief introduction for you!
1. Wire mesh sleeve pulling off due to faulty welding: due to the welding quality, the corrugated pipe, ring and wire mesh sleeve form faulty welding of part of the steel wire during the trinity welding process (over burning or final welding). In this way, after the hose is installed in the pipeline, due to the uneven stress on the steel wire, under the effect of the medium pressure, the steel wire at the faulty weld will pull off first, so that the entire wire mesh sleeve will pull off, which will lead to the failure of the bellows drum and the risk of occurrence.
2. Improper device results in wire mesh breaking: during the installation of the hose, the hose will be stretched and twisted due to improper device or high pressure. When the stress generated by stretching or twisting exceeds the ultimate strength of the hose wire mesh sleeve, the mesh sleeve at the welding part of the hose trinity or the mesh sleeve at other parts will be pulled off, thus causing the outer drum of the bellows to be stretched and damaged, Cause medium leakage, so the design and model selection shall be accurate, and the device shall be correct.
I have so much to say. Here, I would like to remind you that in order to eliminate faulty welding, which leads to wire mesh sleeve pulling off, which leads to hose failure, it should be purchased by the normal rail manufacturer. The welding quality must be guaranteed. Before the hose leaves the factory, the water pressure and air tightness test must be stopped, and it can leave the factory only after it is qualified. In addition, correct installation method shall be adopted for installation. Our products have high cost performance and guaranteed quality. Welcome to our company for consultation and purchase!