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在改建、扩建和技改项目中，为了节省投资，对ＺＭＡＮ型气动薄膜调节阀（图１）进行了改制。该阀阀杆Ｅ与阀瓣为螺纹连接，可拆卸。阀瓣上下结构相同，均可与阀杆Ｅ连接，且不改变阀杆行程。阀体的Ｂ、Ｃ法兰结构相同，当阀体旋转１８０°，即Ｂ、Ｃ法兰互换位置时，不改...
In the reconstruction, expansion and technological transformation projects, in order to save investment, the ZMAN pneumatic diaphragm valve (Figure 1) has been modified. The valve stem E and the valve for the threaded connection, removable. Valve up and down the same structure, can be connected with the stem E, and does not change the stem stroke. Body B, C flange structure is the same, when the body rotation 180 °, that is, B, C flange interchangeable position, do not change ...