Description of reliable sealing of pneumatic butterfly valve to two-way sealing

Pneumatic butterfly valves are often used as cut-off valves in operation. They are opened and closed by rolling butterfly plates, and are often used in large and medium caliber pipelines. Common pneumatic valves include stainless steel pneumatic butterfly valves, hard-sealed butterfly valves, soft-sealed butterfly valves, carbon steel butterfly valves, etc. Each kind of butterfly valve has its own characteristics.
pneumatic butterfly valve
Stainless steel pneumatic butterfly valve seals can be replaced, and the seals are reliable to reach bidirectional seals; flange pneumatic butterfly valve is delicate, simple to disassemble and repair, and can be installed at any position; the structure of clamping pneumatic butterfly valve is simple, compact, with small operating torque and 90 degree turning open agility; the butterfly plate of soft-sealed pneumatic butterfly valve and the connecting selection of valve stem The possible internal leak points are overcome by using a pinless structure.
The spherical shape is chosen for the outer circle of hard-sealed pneumatic butterfly valve butterfly plate, which enhances the sealing function and prolongs the service life of the valve. It can still keep zero leakage after 50,000 times of pressure opening and closing; the flow characteristic of pneumatic butterfly valve tends to straight line and has good conditioning function; the butterfly plate of pneumatic butterfly valve can be sprayed with coating layer according to user's requirements, such as nylon or polyester. Fluorine type; hard seal butterfly valve can be planned as flange connection and clamp connection.

Pneumatic butterfly valves can be closed tightly with only 90 degrees rotation of pneumatic actuator air source and very small rotating moment. Completely equal body chamber provides a very small resistance and a direct flow path for the medium. It is generally considered that pneumatic butterfly valves are suitable for direct open-close operation. The main characteristic of pneumatic butterfly valve is its compact structure, easy operation and maintenance. It is suitable for water, solvent, acid and natural gas and other general working media. It is also suitable for medium with bad working conditions, such as oxygen, hydrogen peroxide, methane and ethylene.