1, opening and closing it is quick, energy, and fluid resistance small, can often operating. 2, simple structure, appearance of small size, structure length short, small volume, light weight, suitable for large diameter valve. Three, can carry the mud, and in apertures liquid stored up at least. 4, low, can achieve good seal. 5, regulation performance. 6, wide open seat effective circulation channel area is larger, fluid resistance smaller. 7, opening and closing torque is small, due to the shaft on both sides of the butterfly plate by medium basic equal role, and produce torque in opposite directions, thus opening and closing more effort. 8, seal face material generally USES rubber, plastic, so low pressure seal performance is good.http://www.zzpv-valves.com
Butterfly valves offer quick open / close facilities. Using tripple eccentric valves allows for high-pressure shut off. The disadvantage of the butterfly valves is that it is less suited for flow-regulation, where an exotic alloy globe valve, for instance, would do a far better job.
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