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Cadex (Yangzhou) Actuator Technology Co., Ltd. specializes in the development of electric valves and electric actuators

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The rotation principle and related introduction of electric butterfly valve

发表时间:2019-10-22 12:17:55 Article source: Publication time: 2019-10-22 12:17:55

Butterfly valve, also known as flap valve, is a simple structured dispatching valve. The butterfly valve that can be used for on-off control of low-pressure pipeline media refers to the disc (clap or disc) as a disc that rotates around the valve shaft to open and close. A kind of valve, valve electric device can be used to control the activities of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals and radioactive media. Blocking and throttling is the primary role on the pipeline. The butterfly valve opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body, and then reaches the intention of opening and closing or dispatching.

Power supply: The motor is three-phase communication, 380V (special order 660V, 440V or 220V), 50Hz (special order 60Hz); control line voltage 220V / 50Hz (special order 60Hz); remote control voltage 24VDC.

Ambient temperature: -20— + 60 ℃ (special order -60— + 80 ℃)

Relative temperature: ≤90% (at 25 ° C)

General type and outdoor type are used in places without flammable / explosive and non-corrosive media; explosion-proof products are dⅠ and dⅡBT4, dⅠ is suitable for non-mining working faces of coal mines; dⅡBT4 is used in factories, and is suitable for environment ⅡA Explosive gas mixture of Group ⅡB T1-T4.

Protection level: Outdoor type and explosion-proof type are IP55 (customizable IP67).

Working time: 10 minutes (can be customized for 30 minutes).

Butterfly valves are used in pipelines that transport various corrosive and non-corrosive fluid media in engineering systems such as generators, coal gas, natural gas, liquefied coal oil and gas, metropolitan gas, hot and cold atmosphere, chemical training and environmental protection for power generation, building water supply and drainage, For conditioning and cutting off media.

The butterfly plate is mobilized by the valve stem. If it is turned 90, it can be closed and closed once. Changing the deflection viewpoint of the butterfly plate can control the flow of the medium.

The butterfly valve refers to a valve whose disc (disc or disc) is a disk that is rotated around the valve shaft to reach the opening and closing. It plays an important role in blocking and saving on the pipeline. The butterfly valve opening and closing piece is a disc-shaped butterfly plate, which rotates around its own axis in the valve body, and then reaches the opening, closing, or adjustment policy. Butterfly valve fully open to fully closed is usually less than 90, butterfly valve and butterfly rod itself does not have a self-locking hand, in order to position the butterfly plate, a worm gear reducer must be installed on the valve rod. Adopting a worm gear reducer can not only make the butterfly plate self-locking, make the butterfly plate stop at any position, but also improve the operation performance of the valve. The characteristics of the industrial special butterfly valve are high temperature, and the practical pressure field is also high. The nominal diameter of the valve is large, the valve body is made of carbon steel, and the sealing ring of the valve plate adopts a metal ring instead of a rubber ring. Large high-temperature butterfly valves are made of welded steel plates, which are important for flue ducts and gas pipes in high-temperature media.

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