2, butterfly valve: butterfly valve is a disc type opening and closing parts reciprocating 90° or so to open, close and adjust the fluid channel of a valve.
Advantages:
(1) Simple structure, small volume, light weight, consumption materials, not used in large caliber valves;
(2) fast opening and closing, small flow resistance;
③ Can be used for medium with suspended solid particles, according to the strength of the sealing surface can also be used for powder and granular media. It is widely used in gas pipelines and waterways of metallurgy, light industry, electric power and petrochemical systems.
Disadvantages:
(1) The flow adjustment range is not large, when open up to 30%, the flow will enter more than 95%;
(2) Due to the limitation of butterfly valve structure and sealing material, it is not suitable for high temperature and high pressure pipeline system. General operating temperature below 300℃, PN40 below;
The sealing performance is relatively poor compared with ball valve and globe valve, so it is used in places where the sealing requirements are not very high.

Nortech is one of the leading industrial valve manufacturers in China with quality certification ISO9001.

Major products: Butterfly Valve, Ball Valve,Gate Valve, Check Valve, Globe Vavlve,Y-Strainers, Electric Acurator , Pneumatic Acurators .

 For more interest, welcom to contact  at: Email: sales@nortech-v.com