在靠冷凝器的位置有一个气动蝶阀，将冷凝器与真空系统隔开。
A pneumatically activated butterfly valve is located close to the condenser to isolate the vacuum system from the condenser.
蝶阀在供热系统中，目前是使用最广泛，种类也最多的一种阀门。
Butterfly in the heating system, is currently the most widely used, most species have a valve.
角行程电动蝶阀，普遍适用于建材、玻璃、矿山、电力、轻工、造纸等行业的通风、环保工程等管道系统中。
This valve is widely used in the pipe system such as venting and environment protection in building material, glass, mining, power, light industry and papermaking departments.
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