The commonly used butterfly valves are electric butterfly valve and pneumatic butterfly valve? Q: What is the difference between electric butterfly valve and electric butterfly valve?? Answer:? The electric regulating butterfly valve is composed of DKJ angle travel electric actuator and butterfly valve, which is used together with the electric unit combination instrument. The meter has the advantages of simple structure, large diameter, light weight and convenient operation. It is widely used in metallurgy, power station petroleum, chemical industry and other departments.?

What dimension shall be suitable for stainless steel pneumatic butterfly valve during welding
Stainless steel pneumatic butterfly valve is a kind of locomotive, which can be used for high-speed overload deployment. It has excellent flexibility, fatigue resistance, high pressure resistance, high temperature resistance, low temperature resistance, corrosion resistance and many other characteristics, and is required to be used on locomotive lines. Fully flexible pipe. There are seven functional indicators: appearance, scale, pressure resistance, air tightness, static and dynamic bending.
The appearance, dimension, pressure resistance and air tightness of the explosion are all included in the ex factory tempering items, and the seven items need to stop tempering in the type trial. It is assumed that the burst welding will be disclosed during the train operation, which will endanger the safety of the train. Therefore, the welding quality of stainless steel pneumatic butterfly valve is very strict.
Tungsten inert gas maintenance welding (TIG welding) is a welding method that uses the arc between the tungsten electrode and the workpiece to heat condense the matrix and filler wire (assuming the filler wire is used) under the maintenance of inert gas. Argon is used as the maintenance gas for tungsten argon arc welding. At high welding temperature, argon does not reflect or dissolve in liquid metal.
Therefore, the welding area has excellent protection impregnation, which is very suitable for welding high carbon steel and alloy steel. Tungsten arc is stable, even if the welding current is small (10A), it can burn safely. Therefore, this welding method is very suitable for thin plate welding and can obtain excellent welding appearance. In order to effectively ensure the weld quality and connect the structural features of pneumatic butterfly valve, tungsten argon arc welding is selected.
The stainless steel pneumatic butterfly valve is mainly composed of bellows, network joint sleeve, joint sleeve, 1Cr18Ni9Ti and other materials. Corrugated pipe is made of thin-walled seamless or longitudinally welded stainless steel pipe, through precision plastic forming, wall thickness, O or less than 5mm; The outer net cover is made of stainless steel wire or steel strip with certain parameters. Mesh sleeves at both ends of the hose are provided with each joint sleeve with a wall thickness of 2mm. The wall thickness of the joint with the heel is greater than 4mm. Because of the large difference in wall thickness, such as improper welding process, simple composition of fusing or poor fusion and other errors.