2、 Structure characteristics of internal thread pneumatic ball valve
1. The fluid resistance is small, and its resistance coefficient is equal to that of pipe sections with the same length.
2. Simple structure, small volume and light weight.
3. Tight and reliable. At present, plastic is widely used as the sealing surface material of pneumatic ball valve with good sealing performance, and it has also been widely used in vacuum systems.
4. It is easy to operate and can be opened and closed quickly. It only needs to rotate 90 ° from full opening to full closing to facilitate remote control.
5. Easy maintenance, simple structure of pneumatic ball valve, generally movable sealing ring, easy removal and replacement.
6. When the valve is fully opened or closed, the sealing surfaces of the ball and valve seat are isolated from the medium. When the medium passes through, it will not cause erosion of the sealing surface of the pneumatic ball valve.
7. It has a wide range of applications. The internal thread pneumatic ball valve can be used from a few millimeters to several meters, from high vacuum to high pressure.

What is a general pneumatic butterfly valve?
What is the difference between general pneumatic butterfly valve and ordinary pneumatic butterfly valve? Universal pneumatic butterfly valve is an important connecting component in engineering technology, which is composed of stainless steel corrugated flexible pipe wrapped with braided mesh sleeve and two end joints. The advantages of the universal pneumatic butterfly valve are: easy and fast installation, one model can be used in many categories, universal use, and good versatility.
Common pneumatic butterfly valve
The general pneumatic butterfly valve can be used for the position compensation of length, temperature, position and angle brought by any element in various gas transmission and infusion pipeline systems and as the compensation element, sealing element, connecting element and damping element in the compensation system Energy buildings and other categories have been applied.
The bellows used in general pneumatic butterfly valves include spiral and annular.
Corrugated pneumatic butterfly valve
Installation and application of general pneumatic butterfly valve
1. National standard General Technical Conditions for Corrugated Pneumatic Butterfly Valves (GB/T14525-93)
2. The corrugated pipe of pneumatic butterfly valve is made of chrome nickel austenitic stainless steel. Pay attention to prevent nitrogen ion pitting corrosion and corrosive damage of dilute sulfuric acid and dilute sulfuric acid during operation.
3. After the user stops the hydraulic test of the equipment and pipeline system equipped with pneumatic butterfly valve, it shall prevent the impact of rust blocks and the accumulation of sediment containing chloride ions, which may cause corrosion and mechanical damage.
4. During installation, the pneumatic butterfly valve shall be protected from splashes and mechanical damage during welding, otherwise it will cause leakage.
5. The sealing pipe system shall strictly comply with the safety operation procedures to prevent the overpressure caused by improper operation or other factors from causing the hose to pull off or burst.
6. Please carefully understand the examples of pneumatic butterfly valve installation methods, and strictly follow the correct sketch for installation and application.