Pneumatic Butterfly Valves Manufacturers

Pneumatic flange butterfly valve, pneumatic flange butterfly valve this product is composed of rubber sealed butterfly valve, carbon steel or stainless steel valve plate and valve stem. It is applicable to water supply and drainage and gas pipelines with temperature ≤ 80 ~ 120 ℃, such as food, chemical industry, petroleum, electric power, light textile, papermaking, etc. for regulating flow and intercepting medium.

Pneumatic butterfly valve

Pneumatic regulating butterfly valve is a valve (valve plate) rotating around a fixed axis perpendicular to the channel. It is composed of piston type double acting or single acting (spring return) pneumatic actuator and butterfly valve. It belongs to rotary high-performance regulating or shut-off valve type, and is equipped with electricity, pneumatic valve positioner or solenoid valve, air filter pressure reducer, limit switch (valve position annunciator), It can realize the proportional adjustment and two position cut-off control of the fluid medium in the process pipeline, so as to achieve the automatic control of the flow, pressure, temperature, liquid level and other parameters of the fluid medium.

The pneumatic wafer butterfly valve has a novel structure. The valve body is designed to meet the short-distance wafer structure formed by the narrow pipe space. The external leakage is zero and the internal leakage meets the national standard.

The pneumatic rubber lined butterfly valve is connected by flange and clamp. The sealing lining is made of nitrile rubber, ethylene propylene rubber, heat-resistant ethylene propylene rubber, natural rubber, chloroprene rubber, fluororubber and polytetrafluoroethylene. It has a more reasonable choice according to the chemical properties of the medium.

The pneumatic fluorine lined butterfly valve and the anti-corrosion fluorine lined butterfly valve adopt the combination of two-piece valve body. The valve seat and the valve body lining are integrated. When the valve works, only the all plastic valve seat and the plastic lined butterfly plate are in contact with the medium. The product can withstand any medium corrosion except the molten alkali metal and elemental fluorine. Among them, the d71f46 valve stem and the butterfly plate (forged) are integrated, and the surface is uniformly coated with a layer of FEP. The inner surface of the valve body channel is smooth, the fluid resistance is small, the CV value is high, the flow capacity is strong, and the torque is moderate. The four-stage sealing structure is adopted and the elastic gasket valve seat of temperature resistant and aging resistant Si rubber is equipped outside the sealing surface, so as to completely achieve zero leakage of the medium.

Pneumatic ventilation butterfly valve is characterized by a fine slit between the valve plate and the valve seat. This product is suitable for use in the environment with poor air circulation.

The main features of the pneumatic telescopic butterfly valve are as follows: novel design, reasonable structure, light weight, convenient operation and rapid opening and closing; In addition to the functions of regulating and intercepting the flow and compensating the thermal expansion and cold contraction caused by the temperature difference of the pipeline, the telescopic butterfly valve can also provide convenience for installation, replacement and maintenance of the valve. The sealing parts can be adjusted and replaced, and the sealing performance is reliable.
The main advantages of the pneumatic butterfly valve are simple structure, small volume, light weight and low cost. The pneumatic butterfly valve is especially prominent. It is installed in the high-altitude secret passage, and it is easy to operate through the control of two position five way solenoid valve, and can also adjust the flow medium. The fluid resistance is small. When the pneumatic butterfly valve of medium and large caliber is fully opened, the effective flow area is large, and the opening and closing is quick and labor-saving. The opening and closing can be completed by rotating the disc plate by 90 degrees. Since the medium force of the butterfly plate on both sides of the rotating shaft is nearly equal, and the torque direction is opposite, the opening and closing torque is small, and good sealing can be achieved under low pressure. The sealing materials of the butterfly valve include nitrile rubber, fluororubber, edible rubber, and PTFE lining, so the sealing performance is good, The hard seal butterfly valve is a soft and hard laminated metal sheet, which has the advantages of metal hard seal and elastic seal, and has excellent sealing performance at low temperature.

working principle

The pneumatic butterfly valve is opened and closed by the circular butterfly plate that rotates with the valve. The pneumatic valve to realize the activation action is mainly used as a block valve. It can also be designed to have the function of regulation or section valve and regulation. The butterfly valve is more and more used in low-pressure medium and large-diameter pipelines.

The butterfly valve is simple in structure, small in volume and light in weight, and is composed of only a few parts. Moreover, the electric valve can be opened and closed quickly only by rotating 90 °, and the operation is simple. At the same time, the electric valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the single resistance when the medium flows through the valve body, so the pressure drop generated by the valve

Small, so it has good flow control characteristics. The butterfly valve has two sealing types: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be embedded on the valve body or attached to the periphery of the butterfly plate.

If the butterfly valve is required to be used for flow control, the main thing is to correctly select the size and type of the valve. The structure principle of butterfly valve is especially suitable for making large-diameter valves. Butterfly valves are not only widely used in oil, gas, chemical industry, water treatment and other general industries, but also used in the cooling water system of thermal power stations