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Structure And Working Principle Of Pneumatic Butterfly Valve Seals
Nov 24, 2016

Because of pneumatic butterfly valve sealing performance, working light, Deputy corrosion, high temperature resistant, easy to operate, flexible and safe are widely used in various industries, pneumatic butterfly valve seal structure: single seal, double eccentricity seal, eccentric three eccentric sealing, seal, seal structure of pneumatic butterfly valve sealing principles are summarized below:

1. single eccentric sealed butterfly valve of sealed principle metal hard sealed butterfly valve: due to in single eccentric butterfly valve of based Shang will Butterfly Board of Rotary Center (both valve axis Center) and valve body center line formed size partial reset, makes butterfly valve in opened process in the, butterfly Board of sealed surface will than single eccentric 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 pneumatic soft sealed butterfly valve opened Shi, two sealed surface Zhijian formed a more big of clearance, the class butterfly valve of design, Greatly reduced between the sealing surface deformation of mechanical wear and tear and congestion, make butterfly valve sealing performance improved;

2. double eccentric sealed butterfly valve of sealed principle: due to in double eccentric butterfly valve of based Shang will valve seat center line again and valve body center line formed a pneumatic hard sealed butterfly valve beta angle partial reset, makes butterfly valve in Kai valve process in the, butterfly Board of sealed surface in opened moments immediately from valve seat sealed surface, and in close moments only will contact and pressure tight valve seat sealed surface. When fully open, the two sealing surfaces form a gap with the same double eccentric butterfly valve, the valve design completely eliminates mechanical wear and abrasion between the two sealing surfaces, stainless steel pneumatic butterfly valve butterfly valve sealing performance and life has been greatly improved;

3. variable eccentric sealed butterfly valve of sealed principle: variable eccentric butterfly valve of unique of at is installation Butterfly Board of valve Rod axis is a three paragraph axis type structure, this three paragraph axis type valve electric lining rubber butterfly valve Rod two paragraph axis paragraph concentric, and Center paragraph axis center line and ends axis deviated from a Center from, butterfly Board on installation in Middle axis paragraph Shang. This structure makes the disc in full open position a double eccentric-shaped, and butterfly's Board turned to the off position when it becomes a single eccentric. Because of the role of the eccentric shaft, near closed, the disc in the valve seat sealing cone into a distance, butterfly's Board reached agreement with the sealing surfaces of the valve seat seal and reliable sealing performance;

4. high-performance triple eccentric two-way hard seal butterfly valve, which is characterized: the seat ring is composed of soft t-shaped seal ring composed of multi-layer stainless steel sheets on both sides. Valve and valve seat sealing surface for the oblique cone structure in the valve plate inclined conical surface of welding temperature resistance, corrosion-resistant alloy materials; pneumatic hard seal butterfly valve fixed on the adjusting ring pressure plate between the spring together with the adjusting bolts on the plate Assembly structure.