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Z-One: 2 way Zone Valves Normally Closed - NA Market

Z-One: 2 way Zone Valves Normally Closed - NA Market

The Z-one, a two-position spring return zone valve, is used in heating and air-conditioning systems.
The Z-one series consist of a Z1 actuator which is easily attached to a Z2 (2-way) or Z3 (3-way) valve body. Z1 actuator is equipped with or without auxiliary switch.
The Z-one actuator has a synchronous motor that winds the return spring and moves the valve paddle to the desired position. When power is removed the actuator spring returns the valve paddle. 24V actuators use a sealed reed switch for end switch, requiring no minimum current load.
US Patent 7,048,251 

Compact design provides quick and easy installation, the Z-one valve fits perfectly inside baseboards and fan coils.
Available with choice of NPT, sweat and press fittings for ease of installation and maintenance. Suitable for chilled
or hot water up to 240°F, and up to 15 psi steam.


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  • The Z-one series two-position spring return with removable actuator zone valve. Z1 series actuator is normally closed (NC) or normally open (NO) 24 V to 277 V 50/60 Hz, 5 W, 7 VA, with or without auxiliary micro-switch {(24 V: 0.0 min,0.4A max, 24 V) (120-277 V: 5.0A, 230 V)}, Auxiliary micro-switch for 24 V actuator is a sealed reed switch requiring no minimum current load, includes leads or terminal block (24 V only); Lost motion transmission disengagement actuation mechanism; Quick-connect actuator-to-valve body assembly (no fastener); ambient temperature from 32 to 104 deg F (0 to 40 deg C) for 120 V, 208 V, 230 V, 277 V actuators with micro-switch; 32 to 125 deg F (0 to 50 deg C) for 24 V actuators; 32 to 170 deg F (0 to 77 deg C) for 120 V, 208 V, 230 V, 277 V actuators without micro-switch. Z2 (2-way) series and Z3 (3-way) series are forged brass (2-way and 3-way 1/2” and 3/4” sweat valve bodies pn Z207411, Z207433, Z307433, Z207533, Z207537 and Z307537 are low-lead brass [<0.25% lead content] certified by ICC-ES file 1360). Valve body rated at 300 psi (20 bar), 15 psi (1 bar) steam. Temperature rated 32 to 240 deg F (0 to115 deg C). Valve stem stainless steel, EPDM seals, flows: 1.0, 2.5, 3.5, 5.0 or 7.5 Cv. Close-off seat leakage: 100% bubble-tight. Connections and sizes: 1/2”, 3/4", 1" and 1 1/4” sweat or 1/2”, 3/4" and 1" NPT female threads, 1/2" SAE flare, inverted flare, 1" straight male threaded union, and 1/2”, 3/4" and 1" press, PEX crimp or PEX expansion end connections with unions. Actuator approved to UL 873, cUL listed and CE, and UL 1995 section 18 air plenum and ducts rating. US Patent 7,048,251.

Technical specification
  • Unique ref.Z2_Closed
  • Collection setHVAC
  • CollectionNorth America
  • TypeObject (single object)
  • Date of publishing2018-06-29
  • Edition number1
  • Material mainBrass
  • Material secondaryStainless steel
  • BIMobject CategoryHVAC - HVAC
  • IFC classificationValve
  • UNSPSC nameValves
  • UNSPSC code401416
  • Uniclass 2015 CodeSs_60
  • Uniclass 2015 DescriptionHeating, cooling and refrigeration systems
  • CSI MasterFormat 2014 Code23 00 00
  • CSI MasterFormat 2014 TitleHeating, Ventilating, and Air Conditioning (HVAC)
  • OmniClass TitleValves
  • OmniClass Number23-27 31 00
  • CSI UniFormat II CodeD30
  • CSI UniFormat II TitleHVAC

Region availability

North America
United States