Key Features˙APPLICATION : The zone valves are used in heating, ventilation and air conditioning plants to control the flow of hot or chilled water. ˙DESIGN FEATURES : ---The valves are supplied complete with actuator that can easily be installed. ---The housing is made of fire-proof plastic. ---A flap made of special rubber is used as the element to provide absolutely tight shut-off. Two O-rings are used to seal the spindle. ---The motor opens the valve electrically and closes it by means of springs. ---Auto/manual lever which allows manual operation at power failure. ˙ORDERING INFORMATION : When ordering, please give quantity, designation and type code. ---Example：1pc, DN20 two-port zone valve, PN21, EZV20.2231 Technical data
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