6. Application of pneumatic ball valve Since rubber, nylon and polytetrafluoroethylene are commonly used as valve seat sealing ring materials for pneumatic ball valves, its service temperature is limited by the valve seat sealing ring materials. The cut-off function of pneumatic ball valve is completed by the metal ball pressing against the plastic valve seat under the action of medium (floating ball pneumatic ball valve). Under the action of a certain contact pressure, the seat seal ring has elastic-plastic deformation in some areas. This deformation can compensate the manufacturing precision and surface roughness of the ball and ensure the sealing performance of the pneumatic ball valve. Since the seat sealing ring of the pneumatic ball valve is usually made of plastic, the fire resistance and fire prevention of the pneumatic ball valve should be considered when selecting the structure and performance of the pneumatic ball valve. Especially in the petroleum, chemical, metallurgical and other departments, when using the pneumatic ball valve in the equipment and pipeline system with flammable and explosive media, more attention should be paid to fire resistance and fire prevention. Generally, pneumatic ball valves are recommended for pipeline systems with dual position adjustment, strict sealing performance, mud, wear, necking channel, rapid opening and closing (1/4 turn opening and closing), high pressure cut-off (large pressure difference), low noise, cavitation and gasification, a small amount of leakage to the atmosphere, small operating torque and small fluid resistance. Pneumatic ball valve is also suitable for pipeline systems with light structure, low pressure cut-off (small pressure difference) and corrosive media. Pneumatic ball valves can also be used in low-temperature (cryogenic) devices and pipeline systems. In the oxygen pipeline system of metallurgical industry, the pneumatic ball valve with strict degreasing treatment shall be used. When the main pipeline in the oil and gas pipelines needs to be buried underground, the full bore welded pneumatic ball valve shall be used. When the adjustment performance is required, the pneumatic ball valve with special structure and V-shaped opening shall be selected. In petroleum, petrochemical, chemical, electric power and urban construction, metal to metal sealed pneumatic ball valves can be selected for pipeline systems with operating temperature above 200 ℃.

Plastic coated pneumatic butterfly valve to your satisfaction
We can see all kinds of wires and cables in many places. These things are wrapped by a pipe called plastic coated pneumatic butterfly valve. From this we can see that plastic coated pneumatic butterfly valve is a kind of wire maintenance jacket, which can maintain some fine instruments well. Normally, if the wires beside the road are not covered with a layer of plastic coated pneumatic butterfly valve, it is easy to fail to transmit power when the wires are exposed to the wind, rain and sun for a long time. If the wires are wrapped with maintenance pipes, they can withstand the test of the weather for a long time. At present, not only the electric power industry will use this kind of hose, but also the chemical and metallurgical industries often need plastic coated pneumatic butterfly valves. We all know that the biggest defect of the line is that it will appear aging after a long time. But once the hose is used to wrap it outside, it can easily avoid the damage of ultraviolet rays to the line, and at the same time, it can be more anti-aging. The tight structure provides a guarantee for equipment in every industry.
What are pneumatic butterfly valves
In general, pneumatic butterfly valves are suitable for use at room temperature, outdoor high temperature, high dust amplitude and various disaster sites, and can also be used in flood situations. But it is worth noting whether it can be used for a long time under heavy water and humid air with strong acidity. Acid rain, salt mist and various chemical dusts are not suitable for use.
Under normal conditions, the surrounding temperature needs to be controlled at 20-40 degrees, and the pneumatic butterfly valve has a good working principle. It is resistant to high pressure, dust and corrosion, and has good compression resistance, reaching 25 kPa. The appearance is very shiny, streamlined, and dust-proof and bacteria resistant. The thermal expansion and contraction as well as the change of indoor temperature difference are also quite good, and the device method is easy to operate. The epoxy coating of the pneumatic butterfly valve can well dispose of the input water, bury the pipeline, and avoid the corrosion of various heavy metal components in the water on the inner wall of the pipeline. At the same time, the service life is also greatly enhanced.
Some usages and precautions of stainless steel pneumatic butterfly valve
Under normal conditions, stainless steel pneumatic butterfly valves can be used at room temperature even in outdoor high temperature, dust or acid rain and salt fog, and can also be used in case of flood and fire. But it is worth noting that it is not suitable for long-term use under heavy water and humid air with strong acidity. In addition, the stainless steel pneumatic butterfly valve needs to be coated with an effective chemical isolation belt to have a long-term life in such an environment as acid rain and salt spray.
Under normal circumstances, the outdoor temperature can be controlled above 20 degrees and below 40 degrees for a long time. And the stainless steel pneumatic butterfly valve is excellent in working mechanism. It is resistant to high pressure, dust and corrosion, and has excellent compression resistance, which can reach 25kPa. The stainless steel pneumatic butterfly valve has a first-class streamline appearance and lubrication, and is also good at dust and bacteria prevention. The thermal expansion and contraction as well as the change of indoor temperature difference are also quite good. At the same time, the device is complete and easy to complete through the instruction book. The surface of stainless steel pneumatic butterfly valve needs to use epoxy coating to effectively avoid oxidation, and the acidity of transmission capacity can prevent corrosion.