1. Double-flap linkage improves efficiency and energy saving
The double-flap center axis opens and closes synchronously, the speed is increased by 50%, the torque is reduced by 30%, and it is suitable for high-frequency switching; the valve disc has a 90° parallel flow channel, the flow resistance coefficient is ≤0.15, and the pressure loss is 20% lower than that of the butterfly valve, saving operating costs.
2. Multiple materials + high sealing adapt to harsh scenarios
Material: ductile iron (1.6MPa water pressure), 304 stainless steel (resistant to pH2-12), 316L stainless steel (resistant to seawater corrosion);
Seal: soft seal leakage rate ≤0.01% VOL, hard seal reaches API 598 bubble grade standard.
3. Compact maintenance-free design
The length is 40%-60% shorter than the gate valve and the weight is 50% lighter, suitable for narrow spaces; there is no valve stem packing, the modular valve disc can be replaced online, and the maintenance time is reduced to 1/3 of the traditional one.
4. Intelligent integrated precision control
Compatible with electric (IP67), pneumatic (response <5s) and other actuators, and adaptable to DCS/PLC systems; optional sensors, real-time monitoring status, fault warning accuracy >95%.
application of double butterfly valve
Chemical industry
Transporting acid and alkali solutions and organic solvents, stainless steel material + PTFE seals meet the needs of highly corrosive environments, such as feed control of reactors in pharmaceutical factories.
Water treatment system
The ductile iron valve body is suitable for drinking water and sewage pipes, and the double-flap structure reduces the water hammer effect (pressure fluctuation ≤±10%), which is used for opening and closing the filter pool in water plants.
Central heating network
The temperature-resistant 150℃ steam medium, the hard seal design prevents high-temperature leakage, and the electric actuator realizes automatic adjustment of the heat network balance.
Metallurgy and shipbuilding engineering
The 316L stainless steel valve is suitable for sulfur-containing flue gas and seawater cooling systems, and is certified by the classification society (DNV GL) for ship ballast water control.
FAQ
1. What are the advantages of the double-flap structure over the single-flap butterfly valve?
The double-flap linkage can balance the fluid pressure, reduce the opening and closing torque by 30%, and avoid the shaft deformation problem caused by the single-flap valve due to the unilateral force; at the same time, the flow channel is more symmetrical and the pressure loss is smaller (the flow resistance coefficient is 20% lower), which is suitable for large-diameter pipelines (DN≥300) and high-flow scenarios.
2. Can the valve be used in a vacuum environment?
Optional metal bellows seal (vacuum level ≤10Pa), through helium mass spectrometry leak detection (leakage rate <1×10⁻⁹Pa・m³/s), suitable for chemical vacuum distillation, pharmaceutical freeze-drying and other processes.
3. Can electric actuators be used in explosion-proof areas?
The electric actuator can be selected Ex d IIC T6 explosion-proof type (in accordance with GB 3836 standard), motor insulation level F, protection level IP68, ATEX certified, suitable for hazardous scenarios such as oil and gas.
4. What is the minimum applicable pipe diameter and pressure range?
Conventional specifications start from DN40 (minimum inner diameter 40mm), pressure range PN10-PN40 (1.0-4.0MPa); DN25 micro valve (pressure ≤2.5MPa) or DN1200 large-diameter valve (pressure ≤1.6MPa) can be customized for special needs.
5. What is the service life and warranty period of the valve?
Under normal working conditions (medium temperature ≤80℃, opening and closing frequency ≤10 times/hour), the service life exceeds 100,000 openings and closings; the warranty period is 2 years, during which free replacement due to material or process problems, and wearing parts (sealing gaskets) can be provided at lifetime cost price.
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