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Butterfly Valve Sealing Principle

Sep 03, 2016

Soft sealed butterfly's valve of sealing such as: single seal, double eccentricity seals, three eccentric sealing and variable eccentric sealing.

1. principle of eccentric soft sealing butterfly valve:

Due to in single eccentric soft sealed butterfly valve of based Shang will Butterfly Board of Rotary Center (both valve axis Center) and valve body center line formed size b partial reset, makes soft sealed butterfly valve in opened process in the, butterfly Board of sealed surface will than single eccentric soft sealed butterfly valve faster to from valve seat sealed surface, butterfly Board turned to 8 ° ~12 ° Shi, butterfly Board sealed surface completely from valve seat sealed, completely opened Shi, two sealed surface Zhijian formed a more big of clearance y, this class soft sealed butterfly valve of design, Reduces mechanical wear between two sealing surfaces and heavy pressure deformation, soft sealed butterfly's valve of sealing performance improve.

2. the principle of double eccentric soft sealing butterfly valve:

Due to soft sealed butterfly valve Butterfly Board of Rotary Center (that valve axis Center) and Butterfly Board sealed section by a, eccentric set, makes butterfly valve in opened process in the, butterfly Board sealed surface gradually from valve seat sealed surface, butterfly Board turned to 20 ° ~25 ° Shi, butterfly Board sealed surface completely from valve seat sealed surface, completely opened Shi, two sealed surface Zhijian formed clearance x, to makes soft sealed butterfly valve in opening and closing process in the, two sealed surface Zhijian relative mechanical wear and the extrusion was reduced, to guarantee has soft sealed butterfly valve of sealed.