Butterfly valve definition and specification parameters
Butterfly valve definition
A butterfly valve is a valve in which a closing member (valve or disc) is a disc that rotates around the valve shaft to open and close, and is mainly used for cutting and throttling on the pipe. The butterfly valve opening and closing member is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjusting. The butterfly valve is normally less than 90° from full opening to full closing. The butterfly valve and the butterfly rod have no self-locking capability. For the positioning of the butterfly plate, a worm gear reducer is added to the valve stem. The use of a worm gear reducer not only enables the disc to have a self-locking capability, but also stops the disc at any position and improves the valve's operating performance.
Specification of butterfly valve <br>Nominal pressure or pressure level: PN1.0-4.0MPa, ANSI CLASS 150-300LB, JIS10-20K
Nominal diameter or caliber: DN40～2000
Connection method: flange connection, clamp connection, butt weld connection and lug clamp connection temperature: -196 ° C ~ 700 ° C
Drive mode: manual, worm gear drive, pneumatic, electric, hydraulic, gas-liquid linkage, electro-hydraulic linkage valve body materials: HT200, WCB, ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, CF8 (304), CF3 (304L), CF8M (316), CF3M (316L), Ti.
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