Electric wafer-type soft-seal butterfly valve uses nitrile oil-resistant rubber, PTFE materials, and a combination of soft and hard metal sheets for the sealing pair. The hard seal structure combines the advantages of both metal hard seals and elastic seals, providing excellent sealing performance under low-temperature conditions. It features bidirectional sealing and installation is not restricted by the direction of media flow. Valve body materials include cast steel and stainless steel, with a sealing test pressure of 0.66-1.76 MPa. The valve plate uses a frame structure to ensure strength. The equipped electric actuator can receive 4-20mA control signals for intelligent positioning and has overheat and overload protection functions. This valve combines media shut-off and flow regulation functions, with low fluid resistance and rapid, labor-saving opening and closing. It is widely used in water supply and drainage, gas pipelines, and sewage treatment systems.
Structural Features
Double Eccentric Soft Seal Structure: Utilizing a double eccentric design (axial eccentricity + radial eccentricity), it achieves a "tighter as it closes" sealing performance through a cam effect. The sealing pair consists of a stainless steel valve seat and a sealing ring made of soft materials such as nitrile rubber (NBR) or fluororubber (FKM), ensuring reliable sealing and a long service life.
Electric Actuator: A rotary electric actuator drives the butterfly plate to rotate 90° for opening and closing. It supports 4-20mA control signals for intelligent positioning and features overheat and overload protection. The electric drive method is suitable for automated control or remote operation requirements.
Clip-on Connection: Double-ended bolts are used to directly clamp the valve between two pipe flanges, resulting in a compact structure and convenient installation, suitable for confined piping environments.
Flow Channel Design: The butterfly plate adopts a frame structure, providing high strength and a large flow area, resulting in low flow resistance and pressure reduction, suitable for flow regulation and shut-off.
Performance Advantages
Reliable Sealing Performance: The combination of soft sealing materials and a double eccentric structure achieves zero-leakage sealing, conforming to GB/T13927-92 standards, suitable for applications requiring high sealing performance.
Strong Corrosion Resistance: The valve body can be made of carbon steel, stainless steel, or alloy steel. The sealing rings are made of oil- and acid/alkali-resistant rubber materials, suitable for water, air, natural gas, oil, and mildly corrosive fluids.
Bidirectional Sealing and Flexible Installation: The valve features bidirectional sealing, allowing for installation regardless of the medium flow direction. It can be installed horizontally or vertically, adapting to complex pipeline layouts.
Easy and Labor-Saving Operation: The electric actuator reduces operating torque; a 90° rotation is sufficient for rapid opening and closing, simplifying operation. This electric valve also offers excellent fluid control characteristics.
Low Maintenance Costs: The sealing rings can be replaced individually. The valve body surface is painted or treated with anti-corrosion coatings, extending service life and reducing long-term maintenance costs.
Applications
Municipal Water Supply Systems: Used for flow regulation and shut-off in urban water supply networks, such as pump station outlets and water plant filtration systems.
Power Industry: Controls the flow of media in boiler feedwater and cooling water pipelines to ensure safe system operation.
Chemical and Food Industries: Suitable for pipelines transporting corrosive media such as acids, alkalis, and organic solvents, as well as food-grade clean pipelines (sealing materials meeting hygiene standards must be used).
HVAC Systems: Regulates the flow of circulating water in central air conditioning systems to achieve temperature control and energy-saving operation.
Fire Protection Systems: Serves as an on/off device for fire protection networks, quickly cutting off or opening water flow to ensure efficient emergency response.