... 2.long-life molded coils 3.PTFE O-ring for superior external sealing Nanjing JLHB Environmental Technology Development Co., ... Application:1, 2-way, normally closed diaphragm valves2, Ideal for liquid, suction and hot gas service3, Solenoid actuated shut- ... vibration protection in coil winding7, Low pressure differential required for full opening8, Mounting stud models can be fied converted to ...