PKP ZJHP46 Pneumatic Diaphragm Fluoroplastics lined single-seat control valve consist of mini-type multi-spring pneumatic diaphragm actuator and a straightway single-seat fluoroplastics lined control valve body; as the parts of the valve that contact the medium are completely lined by fluoroplastics, and sealed by a PTFE corrugated pipe, the valve can be broadly suitable for process control and regulation of strong corrosive mediums like acid, alkali etc, as well as poisonous and volatile gases and liquids, in the industries like chemical industry, oil, metallurgy, medicine, electric power, etc