Caleffi Z54 : 2-Way Valve, 1/2" Sweat, 2.5 Cv, 50 psi ΔP, Normally Closed Spring Return Valve Actuator, 24V AC, On/Off Control Signal, (1) SPST 0.4A Auxiliary Switch, Terminal Block
The Caleffi Z54 is a 2-way motorized zone valve assembly featuring a 1/2" sweat brass valve body and a Z151000 normally closed spring-return actuator with screw terminal connections. It provides dependable on/off control for hydronic heating and cooling. The actuator closes the valve automatically when power is removed for fail-safe operation.
UL873, cULus Listed, and CE certified. Meets UL 1995 section 18 requirements for use in air plenums and ducts. The integrated SPST auxiliary microswitch supports control feedback or interlock. Stainless steel stem and EPDM seals support long service life in hydronic applications.
Key Features
- 2-way motorized zone valve with normally closed actuator
- 1/2" sweat connection for copper piping
- Spring-return actuator. Valve closes on power loss
- Screw terminal block for clean, secure wiring
- Integrated SPST auxiliary microswitch (0.4A @ 24V AC)
- UL, cULus, and CE certifications
Technical Specifications
- Valve Type: 2-Way Straight
- Connection Type: 1/2" Sweat
- Maximum Operating Pressure: 300 psi
- Maximum ΔP: 50 psi
- Cv Rating: 2.5 gpm
- Medium Temperature Range: 32–240 °F
- Electric Supply: 24V AC
- Power Consumption: 7 VA (at full capacity)
- Auxiliary Switch Rating: 0.4A @ 24V AC
- Maximum Glycol Concentration: 50%
- Medium: Water, glycol solutions, vapor (max 15 psi)
Datasheets
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Caleffi Z-One Motorized Zone Valve Installation and Commissioning Manual |
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- Valve Pattern:
- 2-Way
- Valve Size:
- 1/2 Inch
- Connection Type:
- Sweat
- CV Rating:
- 2.5
- GPM:
- 5.0@ 4 psi
- Actuator Type:
- Non Fail-Safe
- Voltage:
- 24VAC
- Control Signal:
- On/Off
- Auxillary Switch:
- Yes
- NEMA 4X Enclosure:
- No
