What role does the butterfly valve play in the pipeline

Ball valve in the pipeline is mainly used to cut off, distribution and change the flow direction of the medium, it only needs to use a rotation of 90 degrees of operation and a small torque to close tight. There are many categories. According to the function, can be divided into bypass valve, air valve, pressure relief valve, sewage valve; According to the transmission can be divided into: pneumatic ball valve, electric ball valve, hydraulic ball valve, pneumatic ball valve, electric hydraulic ball valve, turbine drive ball valve; According to shell/main body material can be divided into: metal material valve, metal body lining valve, non-metallic material valve.

Butterfly valve, also known as the flip valve, is a simple structure of the control valve, mainly by the valve body, stem, disc and sealing ring. Valve body cylindrical, short axial length, built-in disc. Its classification also has many kinds of press. The driving mode includes electric butterfly valve, pneumatic butterfly valve, hydraulic butterfly valve, manual butterfly valve, etc. According to the structure form is divided into center seal butterfly valve, single eccentric seal butterfly valve, double eccentric seal butterfly valve, triple eccentric seal butterfly valve; According to the working pressure is divided into vacuum butterfly valve, low pressure butterfly valve, medium pressure butterfly valve, high pressure butterfly valve, ultra-high pressure butterfly valve. According to the connection is divided into sandwich butterfly valve, flange butterfly valve, lug butterfly valve, welding butterfly valve.

The compressed air line says that the disc in the valve does not touch the inner wall of the valve body. It doesn't cut off the fluid; It only slows the flow in the pipe or flue because there is a gap between the disc diameter and the inner wall of the valve body. Damper valves are primarily used to control air or gaseous fluids and are designed for low pressure applications. Common applications include heating and inlet, exhaust vents, and chimney fume.

The opening and closing part of butterfly valve is a disc-shaped disc rotating around its own axis in the valve body, thus achieving the purpose of opening and closing or adjusting. Butterfly valve fully open to fully close is usually less than 90°, butterfly valve and stem itself has no self-locking ability, in order to disc positioning, the valve stem to install worm gear reducer. Using worm gear reducer, not only can the disc has self-locking ability, so that the disc stops at any position, but also can improve the operating performance of the valve.

Industrial special butterfly valve features high temperature resistance, the use of pressure range is also high, the valve nominal size is large, the body is made of carbon steel, the sealing ring of the valve plate USES metal ring instead of rubber ring. Large high temperature butterfly valve is made of welded steel plate, which is mainly used for smoke duct and gas pipe of high temperature medium.