Caleffi Z47 : 2-Way Valve, 1-1/4" Sweat, 7.5 Cv, 20 psi ΔP, Normally Closed Spring Return Valve Actuator, 24V AC, On/Off Control Signal, (1) SPST 0.4A Auxiliary Switch, 18" Wires
The Caleffi Z47 is a 2-way motorized zone valve assembly featuring a 1-1/4" sweat connection brass valve body paired with a Z111000 normally closed spring-return actuator. Designed for hydronic heating and cooling systems, this valve assembly provides reliable on/off control and fail-safe closure when power is removed.
This UL873, cULus Listed, and CE certified model complies with UL 1995 section 18 standards for air plenums and ducts. It features a stainless steel stem, EPDM rubber seals, and a durable brass construction for long-lasting service life. The integrated SPST auxiliary microswitch provides feedback or interlock functionality for enhanced control and monitoring.
Key Features
- 2-way motorized zone valve with normally closed actuator
- 1-1/4" sweat connection for copper piping systems
- Spring-return actuator closes automatically on power loss
- Integrated SPST auxiliary microswitch (0.4A @ 24V AC)
- Stainless steel stem and EPDM seals ensure durability
- UL, cULus, and CE certified for plenum and duct applications
Technical Specifications
- Valve Type: 2-Way Straight
- Connection Type: 1-1/4" Sweat
- Maximum Operating Pressure: 300 psi
- Maximum ΔP: 20 psi
- Cv Rating: 7.5 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
 |
|
|
Caleffi Z-One Motorized Zone Valve Installation and Commissioning Manual |
|
|
|
- Valve Pattern:
- 2-Way
- Valve Size:
- 1-1/4 Inch
- Connection Type:
- Sweat
- CV Rating:
- 7.5
- GPM:
- 15 @ 4 psi
- Actuator Type:
- Non Fail-Safe
- Voltage:
- 24VAC
- Control Signal:
- On/Off
- Auxillary Switch:
- Yes
- NEMA 4X Enclosure:
- No
