How does the electric butterfly valve work?
2019-02-18
How does the electric butterfly valve work
Electric butterfly valve is composed of electric actuator and butterfly valve, so it has a butterfly valve simple operation, simple structure and other advantages, also widely used in chemical industry, medicine and other industries. Commonly used electric butterfly valve with clamp - type electric butterfly valve and flanged electric butterfly valve two kinds. And because of the electric actuator assisted, so that the development of the butterfly valve and a new step.
Tools/raw materials
By electric device to drive the stem, make butterfly plate 90 ° rotation movement and reach the valve opening and closing.
Steps/methods
First:The principle of the electric butterfly valve is actually very simple, just like the daily use of the razor, the source of energy is electricity, electricity drives the operation of the valve plate, so as to open and close the valve and flow or cut off the role of the fluid. The 220V power supply can be directly input for switching quantity adjustment, or the built-in servo module, the input control signal (4 ~ 20mADC or 1 ~ 5VDC) and single-phase power supply can control the operation.
Secend:The electric actuator of the electric butterfly valve can be divided into switch type and regulating type. And the regulation of electric butterfly valve is to play a role in regulating the flow, can accurately adjust the flow to the thousandth degree, is also a relatively high price of a valve. Electric butterfly valve is not only widely used in petroleum, gas, chemical industry, water treatment and other general industries, but also used in thermal power plant cooling water system.
Third:As a device installed in a pipe, it seems impractical to check the on-off status of the valve in the field, so there are feedback signals. When the electric butterfly valve is placed, it shall ensure that the electric device is not damaged by extrusion and wiring terminals, and prevent contact with corrosive substances. Handle with care to avoid damage to electrical components and mechanical parts.
Fourth:The regulating type has a feedback signal, while the switching type can choose whether to install the feedback signal according to the specific needs of customers. Electric plastic butterfly valve also known as PVC electric butterfly valve, the use of integrated electric actuator in the plastic butterfly valve composition. The regulating type takes AC220V power supply as the power and receives the preset parameter value 4~20mA(0~5 weak current control) signal from the industrial automation control system to complete the regulating action.
Fifth:Electric butterfly valve is a double-headed bolt to connect the valve between the two pipe flanges, flange-type electric butterfly valve is a valve with a flange, bolt the two ends of the valve flange connected to the pipe flange. If electric butterfly valves are required for flow control, it is important to select the correct size and type of valve. The structure of the electric butterfly valve is especially suitable for large diameter valves.
Matters needing attention
Electric butterfly valve should be stored in a dry and ventilated room, not open air storage; Sealing ring should not be in contact with oily substances to avoid aging.
Storage and transportation: cover both ends of the diameter with a cover to prevent dust and rust and keep the passage clean. Both ends of the electric butterfly valve processing surface should be removed dirt, and coated with rust inhibitor.
Electric butterfly valves with a storage life of more than 18 months should be re-tested before installation to ensure structural and functional integrity.
