Pulse jet solenoid Valve 1.Diaphragm 1,500,000 times. 2 ... sealed, stainless steel 304(spring and keeper).4.Valve body:pressure casting, Aluminum alloy, inside and ... valve is 3 years.During the warranty period, if there is any problem with the aluminium alloy body, membrane, solenoid ... quality problem, we supply you the valve accessories--imported membrane, solenoid coil and pilot at preferential price.