Power loss automatic reset (closing) electric ball valve - Shanghai electric valve manufacturer
Time: November 30, 2018 11:27:39 Source: Yonglong Valve Reading: zero second
Power loss automatic reset (closing) electric ball valve - Shanghai electric valve manufacturer
The automatic reset (closing) electric ball valve after power failure is applicable to the process occasions and fluid control systems where the pipeline pressure difference is large, the sealing requirements are strict, and the pipeline medium is cut off. Electric ball valve is a pipeline protection device for industrial automation process control, and electric shut-off valve is usually used for remote switching or regulating control of pipeline medium.
★ Operating principle of automatic reset (closing) electric ball valve after power failure:
The actuator is equipped with a built-in UPS device. When the external power supply is cut off, the energy storage battery can power on the actuator, so that the valve can continue to work to the fully open or fully closed state to achieve the power off reset effect (closed or open state) (power off fully open or fully closed, which can be set according to the factory requirements). The product meets the protection requirements of various special pipelines under harsh working conditions, and is widely used in power plants, chemical plants, liquefied gas stations, gas pipelines, ammonia stations, environmental protection equipment, fire protection systems and other places.
★ Technical parameters of electric ball valve for automatic reset (closing) after power failure:
1. Specification diameter: DN15 ～ DN100
2. Valve body material: carbon steel, stainless steel, fluorine lined F46
3. Connection mode: flange, thread, welding, ferrule
4. Valve body pressure: PN16 ～ FN40
5. Service temperature: - 29~120 ℃, - 40~150 ℃
6. Applicable medium: fuel gas, liquefied gas, ammonia, corrosive gas/liquid
★ Technical requirements for power failure automatic reset (closing) electric ball valve:
1. Structure length: GB/T12221-2005
2. Design and manufacture according to GB/T 12237-2008
3. Flange connection shall comply with GB/T 9113-2010
4. Inspection and test: GB/T 13927
5. Fire resistance test shall be conducted according to JB/T 6899
★ Performance characteristics of electric ball valve with automatic reset (closing) after power failure:
1. The fluid resistance is small, and the ball valve has the smallest fluid resistance among all valves. Even the reduced diameter ball valve has relatively small fluid resistance.
2. The thrust shaft bearing reduces the friction torque of the valve rod, which can make the valve rod operate flexibly for a long time.
3. The valve seat has good sealing performance. The sealing diagram made of PTFE and other materials is easy to seal, and the sealing capacity of the ball valve increases with the increase of the medium pressure.
4. The valve stem seal is reliable. Since the valve stem only rotates rather than moves up and down, the packing seal of the valve stem is not easy to be damaged, and the sealing capacity increases with the increase of medium pressure.
5. Due to the good self-lubricating property of materials such as polytetrafluoroethylene, the friction loss with the ball is small, and the service life of the ball valve is long.
6. The lower mounted valve stem and the convex step at the head of the valve stem prevent the valve stem from ejecting. If the valve stem seal is damaged due to fire, metal contact can also be formed between the convex step and the valve body to ensure the valve stem sealing.
Power off reset (close/open) electric ball valve _ power off reset (open/close) Ball Valve It is only necessary to drive the valve to rotate by 90 ° through the angle travel electric actuator to fully close and fully open, which is compared with the electric gate valve and electric stop valve of the same specification. The valve body channel and the connecting pipe have the same diameter, and the medium can flow almost without loss. The electric O type ball valve has excellent sealing performance, large flow capacity, and convenient handling and maintenance. The electric explosion-proof cut-off valve can realize remote automation to cut off and flow the medium in the transportation pipeline of ammonia station, petroleum, chemical industry, paper making, metallurgy, sewage treatment, oil tank truck, wharf, etc.
Shanghai electric ball valve manufacturer: power off electric ball valve power off electric ball valve power off electric ball valve power off electric ball valve close electric ball valve
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