Caleffi Z-one™ Z45 2-Way Motorized Zone Valve, 3/4 in, C, 300 psi, 3.5 Cv, 24 VAC, Import

CALZ45 MFG #: Z45
  • Amperage Rating: 0.4 A
  • Coefficient of Volume: 3.5 Cv
  • Country of Origin: CN
  • Differential: 30 psi
  • Domestic/Import: Import
  • Electrical Connections: 18 in Wire Lead
  • End Style: C
  • Manufacturer Name: Caleffi
  • Material: Forged Brass
  • Nominal Size: 3/4 in
  • Pressure Rating: 300 psi
  • Series: Z4
  • Voltage Rating: 24 VAC
  • Water Temperature: 32 to 240 deg F
Z-one™ valves are used to automatically shut-off the flow or redirect hot and chilled water in hydronic systems, open systems, closed systems, low-pressure steam; and are UL listed for plenum installations. The motorized two-position, on/off, spring return Z1 series actuator has an end mounted push button for quick installation to the valve body. The actuator is equipped with or without an auxiliary micro-switch and models are either normally closed or normally open and with wire or terminal connections. The high temperature zone valve body Z2 series is 2-way straight through and the valve body Z3 series is 3-way diverting or mixing. The Z1 series actuator is easily attached by a push button lock and requires no tools. The Z-one valve provides 100% bubble-tight seat close-off leakage. The high temperature and high close-off performance characteristics of these zone valves, combined with the compact size, makes them suitable to fit inside baseboards or directly in fan coil units. Z-one valves are available with 1/2 to 1 inch press fittings, the Presscon™ copper tail-piece with union nut, making installation and maintenance fast, easy and efficient. Special slots in the EPDM O-ring allows fluid to leak during system testing if unpressed and provide a perfect leak proof seal when completely pressed. Some models are low-lead brass, for domestic hot water applications.
  • Features and More


  • Two-way zone valve
  • Spring return
  • Normally closed actuator: Z111000
  • Auxiliary micro-switch
  • Suitable fluids: Water, 50% max glycol, 15 psi max steam
  • 5W, 7VA power consumption
  • Rating of auxiliary micro-switch contacts: 0 to 0.4 A 24 V
  • 3/4 in sweat (Presscon™ fitting)


  • For Heating and Air-Conditioning Systems


  • Z111000 Auxiliary Switch and Z200537 Sweat Body


  • California Health and Safety Code 116875 S.3874
  • CE Marked
  • Drinking Water System Components-Lead Content Reduction of Lead in Drinking Water Act
  • File PMG-1360
  • FM 21654
  • ICC-ES Certified
  • NSF/ANSI 372-2011
  • Reduction in Drinking Water Act
  • UNI EN ISO 9001-2008 Certified
  • cUL Listed
  • UL 873
  • UL 1995 Section 18 Air Plenums and Duct
  • US Patent 7048251


  • Limited