Application of electric clamp butterfly valve flow control valve: This product has the advantage of corrosion resistance, rapid opening and closing, IP67 protection, and can be widely used in drainage pipelines, pure water systems, petrochemicals, mineral metallurgy, textile and paper industries, and other applications.
Manufacturer of intelligent electric clamp butterfly valve
Electric clamp type hard sealed butterfly valves are commonly used in ventilation and environmental protection projects in industries such as chemical, building materials, power plants, and glass. They are used as gas medium flow control or shut-off devices in dusty cold or hot air gas pipelines. These valves are generally installed horizontally. Electric clamp type hard sealed butterfly valves are used in the sulfur burning, conversion, and dry absorption sections of sulfur based sulfuric acid systems, and are the preferred brand of valves for sulfur based sulfuric acid plants.
Principle of Electric Clamp Butterfly Valve
This butterfly valve is driven by an electric motor to drive the actuator, allowing the disc plate to rotate freely within a 90 ° range to achieve the purpose of opening and closing or adjusting the flow rate of the medium.
Fluorine lined butterfly valves and rubber lined butterfly valves, as components used to achieve on/off and flow control in pipeline systems, have been widely used in many fields such as petroleum, chemical, metallurgy, hydropower, etc. In the known butterfly valve technology, the sealing form often adopts a sealing structure, and the sealing material is rubber, polytetrafluoroethylene, etc. Due to structural limitations, it is not suitable for industries that are resistant to high temperatures, high pressures, corrosion, and wear. A relatively advanced butterfly valve is the three eccentric metal hard seal butterfly valve, where the valve body and valve seat are connected components, and the sealing surface layer of the valve seat is welded with heat-resistant and corrosion-resistant alloy materials. The multi-layer soft stacked sealing ring is fixed on the valve plate. Compared with traditional butterfly valves, this butterfly valve has the advantages of high temperature resistance, easy operation, frictionless opening and closing, and compensating for sealing with the increase of torque of the transmission mechanism when closing, which improves the sealing performance and extends the service life of the butterfly valve.
Attention should be paid to the use of electric butterfly valves
The electric butterfly valve still has the following problems during use:
- Due to the multi-layer soft and hard stacked sealing ring fixed on the valve plate, when the valve plate is in a normally open state, the medium forms a positive flushing on its sealing surface. The soft sealing tape in the metal sheet interlayer is directly affected by the flushing, which directly affects the sealing performance.
- Due to structural limitations, this structure is not suitable for valves with diameters below DN200, as the overall structure of the valve plate is too thick and has high flow resistance.
- Due to the principle of rubber lined butterfly valves, the sealing between the sealing surface of the valve plate and the valve seat is achieved by the torque of the transmission device, which presses the valve plate against the valve seat. In the positive flow state, the higher the medium pressure, the tighter the sealing compression. When the medium in the flow channel flows backwards and the unit positive pressure between the valve plate and the valve seat is less than the medium pressure as the medium pressure increases, the seal begins to leak.
- High performance electric ventilation butterfly valve,
Characterized in that the valve seat sealing ring is composed of multiple layers of stainless steel sheets on both sides of a soft T-shaped sealing ring.
The sealing surface between the valve plate and the valve seat is a slanted cone structure, and a heat-resistant and corrosion-resistant alloy material is welded on the slanted cone surface of the valve plate; The structure in which the spring fixed between the adjusting ring pressure plate and the adjusting bolt on the pressure plate are assembled together. This structure effectively compensates for the tolerance zone between the shaft sleeve and the valve body, as well as the elastic deformation of the valve stem under medium pressure, solving the sealing problem of the valve in the bi-directional exchange of medium transportation process.
The sealing ring is composed of multiple layers of stainless steel sheets on both sides of a soft T-shaped structure, which has the dual advantages of metal hard sealing and soft sealing. It has zero leakage sealing performance in both low and high temperature conditions. The experiment proves that when the pool is in a positive flow state (the direction of medium flow is the same as the direction of butterfly plate rotation), the pressure on the sealing surface is generated by the torque of the transmission device and the effect of medium pressure on the valve plate. The tighter the compression between the inclined conical surface of the valve plate and the sealing surface of the valve seat when the positive medium pressure increases, the better the sealing effect.
When in reverse flow state, the seal between the valve plate and the valve seat is pressed against the valve seat by the torque of the driving device. As the reverse medium pressure increases, when the unit positive pressure between the valve plate and the valve seat is less than the medium pressure, the deformation energy stored by the spring of the regulating ring after being loaded compensates for the tight pressure on the sealing surface between the valve plate and the valve seat, playing an automatic compensation role.
Therefore, unlike existing technologies that install soft and hard multi-layer sealing rings on the valve plate, this utility model directly installs them on the valve body, and adding an adjusting ring between the pressure plate and the valve seat is an ideal bidirectional hard sealing method. It will replace gate valves and globe valves