Pneumatic switch valve is an automated valve device that uses compressed air as a power source to achieve medium on/off control. Its core function is to drive the valve core action through changes in air pressure, completing the rapid opening and closing of the pipeline system.

1、 Main types and characteristics

ball valve‌

Using a sphere as the opening and closing component, it has low fluid resistance and resistance-The characteristics of high temperature (≤ 538 ℃) and rapid opening and closing only require the replacement of sealing components during maintenance.

butterfly valve‌

The disc structure is suitable for large-diameter pipelines, but its working pressure and temperature range are narrow, and its sealing performance is weaker than that of ball valves.

gate valve‌

The flat valve core achieves bidirectional flow with minimal fluid resistance, but it has a large volume and the sealing surface is prone to wear.

2、 Core structure

actuatorThe cylinder drives the piston to move the valve core through air pressure, which has a slower response speed than electric valves but a simpler structure.

control unitIncludes pressure sensor (bellows/diaphragm) and electrical control contacts, with silver contacts supporting 10A-250VAC loads.

3、 Typical application scenarios

Industrial AutomationPetrochemical pipeline medium control, powder material flow system (to be connected in series with flow valve).

Explosion proof environmentAluminum alloy shell with epoxy resin filling, suitable for flammable and explosive places.

4、 Selection suggestions

parameter Recommended value remark

Nominal Diameter‌ DN15-DN300mm ‌ Select based on pipeline size

work pressure‌ ≤1.6MPa ‌ Valve body needs to be strengthened in high-pressure scenarios

temperature range‌ -40℃~300℃ ‌ High temperature valves require metal valve seats

5、 Common faults

Cylinder leakageCheck the wear of the sealing ring

Valve core jammingClean up foreign objects in the U-shaped groove or adjust the gap between the pads.