蝴蝶阀围带是用来止水的,给压缩空气后使其填充阀壳与活门间隙,达到止水作用。围带系橡胶制品,易损件,质量不佳或操作失误均会引起损坏,造成蝴蝶伐关闭后漏水,影响蜗壳工作。过去更换围带,必须使压力钢管停水,拆卸蝴蝶阀,吊出解体,分上、下两半,松围 Butterfly valve shroud is used to stop water, compressed air to fill the valve housing and valve clearance, to stop the water effect. Belt Department of rubber products, wearing parts, poor quality or operating errors can cause damage, resulting in Butterfly cut off after the leak, affecting the volute work. In the past to replace the shroud, the pressure pipe must be no water, remove the butterfly valve, hanging out of disintegration, points on the next two halves, loose