zma-尊龙登录

zma-w type pneumatic film sylphon seal regulating valve consists of pneumatic diaphragm actuator and bellows sealed valve seat. the valve core is sealed by bellows. the top of the valve cover is sealed by other packing, which forming two seals. therefore, it can prevent media strictly from leaking out. it is suitable for regulating toxic, expensive, volatile, and easily penetrating process fluid.