... especially suitable for heavypollution conditions.5, good substitution for solenoid valve.6, High protection class, can be worked in moistconditions. ... for1, IC card meters, heat energy meters, air-warm valve.2, HVAC and fire work.3, Water equipment, uto-controlwatersystem ... water heaters,washing machins, water heaters, industrial DN20 "T "ball 3way 2,3,5wires motorized Female and male ball valve