Pneumatic plastic PVC butterfly valve and accessories

The pneumatic plastic PVC butterfly valve is a pneumatic valve which uses the circular butterfly plate rotating with the valve as the opening and closing property to realize the opening action. It can also be designed to have the function of regulating or section valve and regulating when it is mainly used as the block valve. At present, the butterfly valve is used more and more in the low-pressure and large and medium caliber pipeline. The main advantages of the pneumatic plastic PVC butterfly valve are simple structure, small volume, light weight and low cost. The pneumatic butterfly valve is particularly remarkable. It is installed in the high-altitude dark channel, easy to operate through two position five way solenoid valve control, and also can adjust the flow medium. The flow resistance of pneumatic plastic PVC butterfly valve is small. When the pneumatic butterfly valve with medium and large caliber is fully opened, the effective flow area is large, and the opening and closing are fast and labor-saving. The opening and closing can be completed by rotating the disc plate 90 degrees. Because the medium force of the disc plate on both sides of the rotating shaft is nearly equal, the torque direction generated is opposite, so the opening and closing torque is small, and good sealing can be realized under low pressure. The pneumatic plastic PVC butterfly valve is sealed The materials are NBR, Viton, edible rubber and PTFE lining, so the sealing performance is good. The hard sealing disc valve is a soft and hard laminated metal plate, which has the important advantages of metal hard sealing and elastic sealing, and has excellent sealing performance at low temperature.

Applicable environment analysis of structure principle of pneumatic plastic PVC butterfly valve:

The butterfly plate of the pneumatic plastic PVC butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, with the rotation angle between 0 ° and 90 °. When it rotates to 90 °, the valve will be fully open. Pneumatic plastic PVC butterfly valve is simple in structure, small in volume and light in weight. It is composed of a few parts. Moreover, the valve can be opened and closed quickly with only 90 ° rotation, and the operation is simple. At the same time, the electric valve has good fluid control characteristics. When the pneumatic plastic PVC butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is very small, so it has better flow control characteristics. Butterfly valve has two types of seal: elastic seal and metal seal. Elastic sealing valve, sealing ring can be inlaid on the valve body or attached to the periphery of butterfly plate. The service life of the valve with metal seal is generally longer than that of the valve with elastic seal, but it is difficult to achieve complete seal. The metal seal can adapt to the higher working temperature, while the elastic seal has the limitation of temperature. If pneumatic plastic PVC butterfly valve is required to be used as flow control, the main thing is to correctly select the size and type of valve. The structure and principle of butterfly valve is especially suitable for making large-diameter valve. Pneumatic plastic PVC butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power station.

Common accessories of pneumatic valve air filter pressure reducer:

Air filter pressure reducer is the most typical accessory. It is used to purify the air source of air compressor and adjust the required pressure value. It has the function of automatic pressure stabilization.

Air filter decompressor works on the principle of force balance. When the air from the air compressor is input to the input end of the filter reducer, it enters the filter. Due to the function of the cyclone disk, the air flow rotates and separates part of the moisture in the air, which settles down at the bottom of the shell. When the air flow passes through the filter, the water, oil, dust and air will be purified and then output.

When installing the filter air decompressor, it must be connected with the pipeline respectively in the direction of arrow, input and output. When the pressure reducer works normally, it does not need special maintenance. Overhaul once half a year after use. When the filter element is blocked, it can be removed, boiled in 10% dilute hydrochloric acid, rinsed with clear water, dried and then used again.