Description
Double Eccentric Stainless Steel Butterfly Valve is also called high performance butterfly valve, mainly used for drainage in water plants, power plants, steel mills, chemical industry and other systems, as a regulating and intercepting device. Double eccentric butterfly valve is more resistant to high pressure, has a longer life and good stability.
Product advantages
Strict material selection
Strict material selection, excellent materials, raw material casting, high-temperature forging process, beautiful appearance, quality assurance
Waterproof and dustproof
Good sealing, waterproof and dustproof, good gloss texture, tough and high hardness, strong antioxidant ability, good weather resistance
Stable operation
Reasonable structure, scientific design, stable operation, unrestricted medium flow, no disturbance, no pressure reduction, long life
Double eccentric butterfly valve
Product Overview
This series of double eccentric butterfly valves are welded with selected materials. Its novel structure adopts the double-dimensional eccentric principle design. The valve seat adopts a soft and metal seal compatible structure, with advanced technology and exquisite processing.
Product applications
Mainly used in VOC industrial waste gas treatment industry, furniture factories, coating factories, paint factories, tobacco, soft packaging, chemical industry, coal chemical industry, coking, new materials, rubber, electronics, medicine, and waste incineration systems, as waste gas and smoke sealing and cutting functions.
Working Principle
The nominal pressure of the valve is 0.1MPa. The damper butterfly valve is used to connect pipelines, open and close or adjust the medium flow. Application: The sealing material of the damper butterfly valve is made of the same material as the valve body and processed into a sealing ring. The driving methods include manual, turbine, bevel gear, electric, pneumatic, etc.
Product Features
1. Small fluid resistance.
2. Small external force required for opening and closing.
3. The flow direction of the medium is not restricted.
4. When fully open, the sealing surface is less eroded by the working medium than the globe valve.
Product advantages
1. Electric opening and closing, with arbitrary adjustment, check and cut-off functions. Easy to operate, safe and reliable.
2. The electric butterfly valve can continuously realize the action of slow opening, fast opening or fast closing, slow closing, and effectively prevent the backflow of the medium at the pump outlet and the generation of water hammer.
Performance characteristics
The sturdy handwheel provides reliable emergency manual operation in the event of a power failure.
The high-quality aluminum alloy housing is exquisite and lightweight, coated with a layer of protective material to adapt to extremely harsh environments, and other types of coatings can be applied as needed.
The manual/electric conversion handle can be safely operated at any time. While pressing the handle with appropriate force, slowly turn the handwheel to engage the internal clutch. The clutch will automatically disengage when the motor is powered and in the electric lock state.
The professionally designed useful work measurement system is used as the output torque measurement system. The system is developed from the familiar electrical energy measurement technology to obtain accurate and repeatable torque measurements, and is independent of frequency, voltage and temperature changes.
The control panel display LCD can provide instantaneous and latest status and valve position, with Chinese and English languages available, and an intuitive menu structure that provides calibration and diagnostic information, including torque curves, operation and fault records, motor status, local information and hardware data.
Field control "open"/"close" knobs and padlocked "local"/"stop"/"remote" mode knobs all use isolated magnetic transfer Hall effect devices, no through-shaft, good sealing performance, and eliminate the troubles that may be caused by faulty and fragile reed switches.
Absolute coding technology
■ The absolute encoder used in the electric actuator can operate continuously and is 100% repeatable. It can provide accurate position signals to the processor even without power or battery power.
■ Single-turn uses 12-bit counting with an accuracy of 0.08
■ Multi-turn uses 6-level gear counting, which can reach 4096 turns (the count value is unique in the 4096 rotations of the drive sleeve)
■ The redundant circuit of the encoder can ensure normal operation even if 50% of the components fail.
Electronic torque detection
■ The cut-off torque can be set bidirectionally (forward/reverse) independently in steps of 1%.
■ The electronic torque detection device includes an effective power detection circuit, a motor angular velocity detection circuit, a control circuit and a CPU microprocessor. During operation, the microprocessor continuously detects the effective power and angular velocity of the motor and calculates the actual torque and compares it with the preset cut-off torque. Once it exceeds the limit, the CPU immediately cuts off the motor power supply and outputs a fault alarm message to achieve over-torque protection. The actuator motor will not burn out due to stalling, and the valve will not be damaged due to over-torque of the actuator.
■ Non-contact torque detection, no mechanical torque switch is required, no mechanical wear, and long service life.
■ The output torque can be simply and quickly set using an infrared setter without opening the cover.
■ It is not affected by factors such as temperature and voltage fluctuations, has high accuracy, and can fully meet the reliable protection of on-site valves.
