Pneumatic butterfly valve basic information
The main advantages of pneumatic butterfly valve are simple structure, small volume, light weight and low cost. Pneumatic butterfly valve has a particularly obvious characteristics. Installed on the high altitude tunnel. It is controlled by two-position five-way solenoid valve, easy to operate, and the flow medium can be adjusted. Small fluid resistance, large diameter pneumatic butterfly valve when fully open circulation area, switching speed, switching speed. Because the rotary shaft on both sides of the butterfly plate medium force is close to equal, the torque direction is opposite, the opening and closing torque is small, the low pressure sealing is good. Butterfly valve seal material for Dingqing rubber. Fluorine rubber, edible rubber and tetrafluoride lining have good sealing performance. Among them, the hard seal butterfly valve is a hard layer metal plate, has the advantages of metal hard seal and elastic seal, has excellent sealing performance at low temperature.
The working principle of
The pneumatic butterfly valve adopts the circular butterfly plate and the valve citrus rotation switch, the pneumatic valve is mainly used for the truncation valve. It can also be designed as a disc valve with regulating or segment valves and regulating functions. Disc valves are increasingly used in low pressure large and medium diameter pipes.
Butterfly valve is simple in structure. Small volume. Light weight and composed of only a few parts. And it's a simple 90° rotation. At the same time, the electric valve has good fluid control characteristics. When the butterfly valve is fully open, the thickness of the butterfly plate is the single resistance of the medium through the body, so the pressure generated through the valve is reduced.
It is very small and therefore has good flow control characteristics. There are two types of butterfly valves: elastic seal and metal seal. Elastic sealing valve, sealing ring can be attached or around the butterfly plate.
Characteristics of the
1. Replaceable stainless steel pneumatic butterfly valve seal, seal firmly, realize two-way seal.
2. Flange pneumatic butterfly valve delicate and simple, simple disassembly and maintenance, equipment can be used in any position.
3 clip pneumatic butterfly valve has simple structure. Small operating torque, 900° fast open reversal.
4. The connection between the butterfly plate and the stem of the soft-seal pneumatic butterfly valve adopts the non-pin structure to overcome the possible internal leakage point.
5. Hard seal pneumatic butterfly valve butterfly plate outer circle is spherical, which not only improves the sealing function, but also extends the service life of the valve.
6. Pneumatic butterfly valve flow characteristics linear, good conditioning function.
7. Spray pneumatic butterfly valve butterfly plate according to user requirements, such as nylon or PTFE.
8. Hard seal butterfly valve can be planned for flange connection and clamp connection.
If butterfly valves are required as flow control, the valve size and type should be selected correctly. Large diameter valves are especially suitable for butterfly valve construction. In the cooling water system of thermal power station, butterfly valve is not only widely used in oil, natural gas, chemical industry, water treatment and other industries.
