Caleffi – Z111900 Z1 actuator for motorized zone valves (closed) With auxiliary microswitch.UL873, cULus Listed CE. UL 1995 sec.18 air plenums and ducts.U.S. Patent 7,048,251. Normally closed actuator for motorized zone valves. Z1 Normally closed actuators fit on Z2 and Z3 valves. Normally open actuators fit on Z2 valves only. Easy pushbutton attachment 7/8″ knockout for 1/2″ conduit connector. Rating of auxiliary
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