Ibolo Pneumatic Butterfly Valve
Published: June 2, 2016 Author: 【191566.com】
Working principle of pneumatic environmental protection special butterfly valve
Pneumatic Wafer Butterfly Valve, butterfly valve is equipped with pneumatic actuator. The execution speed of pneumatic actuator is
relatively fast, and it does not require workers to do it by themselves, which greatly saves human resources and time. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, and the initial position of the valve is determined according to actual needs. When the valve is rotated 90 ¡ã from the initial position, an action ends (from open to close, or from Off to on), otherwise it is the end of another action (from off to on, or from on to off).
The butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts.
Moreover, it can be quickly opened and closed only by rotating 90 ¡ã, 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 only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has good flow control characteristics.
The butterfly valve has two types of sealing: spring and metal. Elastically sealed valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate.
Valves with metal seals generally have a longer life than valves with elastic seals, but it is difficult to achieve a complete seal. Metal seals can adapt to higher operating temperatures, while elastic seals have the disadvantage of being temperature limited.
If butterfly valves are required for flow control, the main thing is to choose the correct valve size and type. The structural principle of the butterfly valve is particularly suitable for making large-caliber valves.
Butterfly valves are widely used not only in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems in thermal power stations.
Features of pneumatic butterfly valve
Simple structure, small size, light weight and low cost. It is installed in the high-altitude underpass, and it is easy to control and operate through the two-position five-way solenoid valve, and it can also adjust the flow medium. The fluid resistance is small, the effective circulation area is large when the medium and large diameter pneumatic disc valve is fully opened, and the opening and closing is quick and labor-saving. The disc can be opened and closed by rotating the disc at 90 degrees, because the medium force of the disc plate on both sides of the shaft is nearly equal The generated torque is in the opposite direction, so the opening and closing torque is small, and a good seal can be achieved at low pressure. Butterfly valve sealing materials include nitrile rubber, fluorine rubber, edible rubber, lined with PTFE, so the sealing performance is good.
Nominal pressure: 1.6, 184.108.40.206.6.4MPa
Operating temperature: -29 ～ 425 ℃ (carbon steel) -40 ～ + 550 ℃ (stainless steel)
Nominal diameter: DN50 ～ 800mm
Body material: 304.306.316L.WCB.HT200
Connecting flange: JB / T79. GB913. HG20592
Applicable medium: air, water, steam, oil and corrosive fluid such as nitric acid
Mode of action: cut-off, adjustable, manual control
Power supply voltage: 220VAC, 24VAC
Input signal: 4 ～ 20mA / 1 ～ 5VDC
0 ～ 20mA / 0 ～ 10VDC