Hydraulic Butterfly Valve
The invention of the butterfly valve has improved processes and applications in various industries. A butterfly valve is a mechanism that regulates the flow of materials within large pipe diameters by the quarter-turn rotation of a disc.
A butterfly valve is a quarter-turn rotational motion valve used to stop, regulate, and start flow.
A butterfly valve has a disc that is mounted on a rotating shaft. When the butterfly valve is fully closed, the disk completely blocks the line.
When the butterfly valve is fully opened, the disc is at a right angle to the gas or liquid flow.
They are used in a wide variety of process media and industries, especially in water supply, collection, and distribution, as well as pumping stations. As a result, they have a broad range of use cases, especially in flow isolation.
A couple of their key advantages over other valve families are their simple construction and compactness, resulting in the end products being of lighter weights and lower cost and with smaller installation footprints and faster actuation speeds.
The construction of a butterfly valve is relatively simple, with the rotation of the valve disc controlling the fluid flow. In the closed position, the disc blocks the valve bore, while in the open position, the disc is oriented perpendicular to the flow direction to allow flow.
Butterfly valves generally provide bi-directional flow and shutoff capability. However, they are not full- bore, which renders them unsuitable for pigging or swabbing. The body material is ductile iron with an epoxy powder coat on both internal and external surfaces.
Product Description
There are multiple ways to operate or actuate a butterfly valve – manual, semi-manual, or fully automatic.
Butterfly valves can be operated manually by handles and gears or automatically by electric, pneumatic or hydraulic actuators. These devices allow precise rotation of the disc to positions ranging from fully open to fully closed.
A Hydraulic Actuator is a device that helps in automatically closing or opening a valve. The actuator automates the operation of the valve and limits human interaction with the valve package. These actuators are hydraulic because the working media in such a type of actuator is hydraulic oil.
A hydraulic actuator consists of a cylinder or fluid motor that uses hydraulic power to facilitate mechanical operation.
The mechanical motion gives an output in linear, rotary, or oscillatory motion. Because liquids are nearly impossible to compress, a hydraulic actuator can exert considerable force.
The hydraulic cylinder consists of a hollow cylindrical tube along which a piston can slide.
The term single acting is used when the fluid pressure is applied to just one side of the piston. As a result, the piston can move in only one direction. Spring is frequently used to give the piston a return stroke.
The term double acting is used when pressure is applied on each side of the piston; any difference in tension between the two sides of the piston moves the piston to one side or the other.
Butterfly valves can be used across a wide range of applications. They perform well in large volume water applications and slurry applications. The following are some typical applications of butterfly valves:
⦿ Wastewater treatment, water supply;
⦿ Compressed air and gas application;
⦿ Chemical and oil industries;
⦿ Slurry and similar services;
⦿ Fuel handling systems;
⦿ Power generation;
⦿ Vacuum service;
⦿ Fire protection.
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