The Caleffi Z44P is a factory-matched Z-one 2-way motorized zone valve, published by Caleffi at 3.5 Cv and 30 psi close-off as a complete assembly. It pairs a Z200687 valve body with the Z111000 normally closed spring-return actuator, terminated in 1/2" 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) NA16264 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.
3.5 Cv at 30 psi Close-Off
Caleffi publishes the complete Z44P assembly at 3.5 Cv and 30 psi close-off. Size from the assembly figure, not from the component valve body listed in the quick-order table.
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 | 1/2" |
| Valve body | Z200687 |
| Actuator | Z111000 |
| Supplied components | Z111000 actuator, Z200687 valve body, (2) NA16264 press tail pieces |
| Flow coefficient | 3.5 Cv (published assembly rating) |
| Max. close-off differential pressure | 30 psi |
| Component body rating | Z200687, 7.5 Cv / 20 psi per 01115 NA quick-order table |
| 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. |
Ratings for this assembly taken from Caleffi sell sheet 03619 NA and the current Caleffi product listing; construction details from technical brochure 01115/23.1 NA. 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 Z44P?
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) NA16264 press tail pieces.
What connection does the Caleffi Z44P use?
1/2" Press. Other sizes and connection styles in the Z-one range are listed under Related Products.
What differential pressure will the Caleffi Z44P close against?
Caleffi publishes the complete Z44P assembly at 3.5 Cv and 30 psi close-off, per sell sheet 03619 NA and the current Caleffi product listing. The 01115 NA quick-order table maps this code to a Z200687 component body rated 7.5 Cv; where the two differ, size from the published assembly rating.
What is the pressure rating of the Caleffi Z44P?
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:
- 1/2 inch
- Flow Coefficient:
- 3.5 Cv
- Max Close-Off Pressure:
- 30 psi
- Fail Position:
- Normally Closed
- Electric Supply:
- 24 V AC
- Auxiliary Microswitch:
- Yes
- Power Connection:
- 18 in Wire Leads
