... control watersystem,industrial mini-auto equipment, Small equipment for automatic control 4 Irrigation equipment,drinking water equipment,solar water ... particularly when solenoid cannot work reliably,the circumstance pneumatic valve can not work. 6. Multiple voltage and control mode, ... seat, EPDM and NBR stem seat, NBR o-rings .Body: brass or stainless steelBall: brass or stainless steelStem: brass ...