The Caleffi Z45P is a factory-matched Z-one 2-way motorized zone valve: a Z200687 valve body with 7.5 Cv and 20 psi close-off, paired with the Z111000 normally closed spring-return actuator, terminated in 3/4" Press connections.
Best for zoning a hydronic circuit from one part number instead of specifying body, actuator and tail pieces separately.
Warranty
Key Features
Supplied as a Matched Assembly
Ships as Z111000 actuator plus Z200687 valve body plus (2) NA16265 press tail pieces, so the body, actuator and end connections are already matched.
Normally Closed Spring Return
The actuator springs the paddle back to the closed position in 6 seconds when power is removed, with no stored energy source required.
7.5 Cv at 20 psi Close-Off
The Z200687 body seats 100 percent bubble-tight against differential pressure up to 20 psi.
Auxiliary Microswitch Rated 0.0 - 0.4 A @ 24 V
The switch trips at 60 percent open or on manual opening. The 24 V sealed reed switch drives relays, boiler TT contacts and DDC inputs with no minimum current load.
Serviceable Without Cutting Pipe
The actuator releases with a push button and the union connections free the body, so either can be replaced without disturbing the soldered or pressed joint.
Press Connections with Leak-Before-Press
Slots in the EPDM o-ring let fluid weep during system test if a joint is unpressed, and seal fully once pressed. Press-assembled bodies are rated to 200 psi static.
Technical Specifications
| Product Type | Motorized Zone Valve |
| Series | Z-one |
| Configuration | 2-Way |
| Connection type | Press |
| Connection size | 3/4" |
| Valve body | Z200687 |
| Actuator | Z111000 |
| Supplied components | Z111000 actuator, Z200687 valve body, (2) NA16265 press tail pieces |
| Flow coefficient | 7.5 Cv |
| Max. close-off differential pressure | 20 psi |
| Max. static pressure | 200 psi (press-assembled bodies) |
| Medium temperature range | 32 - 240 deg F |
| Max. percentage of glycol | 50 % |
| Fail position | Normally Closed (spring return) |
| Electric supply | 24 V AC, 50/60 Hz |
| Power requirements | 5.0 W, 7 VA |
| Auxiliary microswitch | 0.0 - 0.4 A @ 24 V |
| Power connection | 18 in wire leads |
| Full stroke time | Open: under 60 seconds / Close: 6 seconds |
| Close-off seat leakage | 100 % bubble-tight |
| Approvals | UL 873, cUL Listed, CE; UL 1995 sec. 18 air plenum and duct |
| Source note | Caleffi technical brochure 01115/23.1 NA and installation manual NA10073 rate press-tailpiece models at 200 psi maximum static pressure; the current Caleffi product page lists 300 psi. ZOT Supply publishes the lower figure pending manufacturer confirmation. |
Specifications transcribed from Caleffi technical brochure 01115/23.1 NA and installation manual NA10073. Last verified August 2026.
Documentation
Related Products
- Caleffi Z40 : Z-one 2-Way Motorized Zone Valve, Inverted Flare, 3.5 Cv, 30 psi Close-Off, 24V AC Normally Closed Actuator with Auxiliary Microswitch, 18 in Wire Leads
- Caleffi Z40F : Z-one 2-Way Motorized Zone Valve, 3/4" Sweat, 3.5 Cv, 30 psi Close-Off, 24V AC Normally Closed Actuator with Auxiliary Microswitch, 18 in Wire Leads
- Caleffi Z42 : Z-one 2-Way Motorized Zone Valve, 1/2" SAE Flare, 3.5 Cv, 30 psi Close-Off, 24V AC Normally Closed Actuator with Auxiliary Microswitch, 18 in Wire Leads
- Caleffi Z44 : Z-one 2-Way Motorized Zone Valve, 1/2" Sweat, 2.5 Cv, 50 psi Close-Off, 24V AC Normally Closed Actuator with Auxiliary Microswitch, 18 in Wire Leads
Frequently Asked Questions
What is included with the Caleffi Z45P?
A 24 V AC normally closed spring-return actuator with auxiliary microswitch and 18 in wire leads power connection, and a Z200687 valve body, supplied with (2) NA16265 press tail pieces.
What connection does the Caleffi Z45P use?
3/4" Press. Other sizes and connection styles in the Z-one range are listed under Related Products.
What differential pressure will the Caleffi Z45P close against?
Up to 20 psi at 7.5 Cv, seating 100 percent bubble-tight.
What is the pressure rating of the Caleffi Z45P?
Caleffi documentation is not consistent on this point. Technical brochure 01115/23.1 NA and installation manual NA10073 rate press-tailpiece models at 200 psi maximum static pressure, while the current Caleffi product page lists 300 psi. ZOT Supply publishes the lower 200 psi figure pending written confirmation from Caleffi. Contact us before specifying this valve above 200 psi.
- Product Type:
- Motorized Zone Valve
- Product Family:
- Z-one Zone Valves
- Configuration:
- 2-Way
- Connection Type:
- Press
- Connection Size:
- 3/4 inch
- Flow Coefficient:
- 7.5 Cv
- Max Close-Off Pressure:
- 20 psi
- Fail Position:
- Normally Closed
- Electric Supply:
- 24 V AC
- Auxiliary Microswitch:
- Yes
- Power Connection:
- 18 in Wire Leads
