The Belimo Z2050QPF-F+CQKXUP is a 2-way, 1/2″ press fit ZoneTight (QCV) zone valve with a Cv of 1.4, supplied as an assembly with the Belimo CQKXUP electronic fail-safe on/off actuator powered at 100-240 VAC. The valve is rated for 75 psi close-off with 0% leakage and an equal percentage flow characteristic.
This is an X model actuator. Belimo directs ordering X model actuators for a factory clip setting; select the required clip position with the Factory Clip Setting option before adding this assembly to the cart.
Specifications on this page are taken from the Belimo Z2050QPF-F+CQKXUP assembly technical data sheet (actuator section rev 2025-12-24), the Belimo Z2050QPF-F valve technical data sheet (rev 2026-02-07) and Belimo Quick Mount Visual Instruction Manual 71694-00001.K. Verified 2026-09-11.
Press fit hydronic piping in space restricted locations where the actuator must mount without tools. Belimo lists unit ventilators, fan coil units, VAV reheat coils, fin tube casing, radiant panels and duct coils as common QCV applications in large commercial buildings.
Warranty
Belimo warrants all components of the ZoneTight valve and actuator assembly for 5 years from the date of production. Operating the valve above 212°F voids the manufacturer warranty.
Key Features
75 psi Close-Off, 0% Leakage
Ball valve with a 75 psi close-off rating, 40 psi maximum differential pressure and an equal percentage flow characteristic.
Field Adjustable Cv
An end stop clip limits rotation in 2.5° increments to set maximum flow, from Cv 0.1 up to the full 1.4. Modulating actuators must re-adapt after the clip is moved.
Tool-Free Snap Assembly
The actuator plugs onto the valve by hand with vertical movement only, and can be oriented in 180° increments.
Electronic Fail-Safe Actuator
Bridging time 2 s, pre-charging time 5 to 20 s, fail-safe running time <60 s.
Plenum Rated
UL 2043 compliant; suitable for use in air plenums per Section 300.22(C) of the NEC and Section 602 of the IMC.
Technical Specifications
Valve Body (Z2050QPF-F)
| Valve pattern | 2-way |
| Valve size | 1/2″ [DN 15] |
| Cv | 1.4 |
| Pipe connection | Press fit |
| Fluid | chilled or hot water, up to 60% glycol |
| Fluid temperature range | 36 to 212°F [2 to 100°C] |
| Body pressure rating | 250 psi |
| Close-off pressure | 75 psi |
| Differential pressure max | 40 psi |
| Flow characteristic | equal percentage |
| Leakage rate | 0% |
| Controllable flow range | 75° |
| Angle of rotation | Operating range 15 to 90° |
| Direction of rotation | opens counterclockwise, closes clockwise |
| Flow direction | both directions possible |
| Installation orientation | upright to horizontal (in relation to the stem); not hanging with the stem pointing down |
| Servicing | maintenance-free |
| Valve body material | forged brass |
| Ball | chrome plated brass |
| Stem | brass |
| Stem seal | EPDM O-ring |
| Seat | PTFE, O-ring EPDM |
| Valve body weight | 0.48 lb [0.22 kg] |
| Dimensions | A 4.9″ [125 mm], B 4.2″ [107 mm], E 0.9″ [24 mm], F 0.9″ [24 mm]. Height C is 3.1″ [80 mm] or 3.3″ [83 mm] and D is 2.6″ [65 mm] or 2.7″ [69 mm], per the two actuator housings drawn on the data sheet |
Belimo states this product can expose you to lead, a chemical known to the State of California to cause cancer and reproductive harm (Proposition 65).
Actuator (CQKXUP)
| Actuator type | Electronic Fail-Safe, On/Off |
| Nominal voltage | AC 100 to 240 V |
| Nominal voltage frequency | 50/60 Hz |
| Nominal voltage range | AC 85 to 265 V |
| Power consumption in operation | 3 W |
| Power consumption in rest position | 0.5 W |
| Transformer sizing | 7 VA |
| Electrical connection | 19 AWG appliance cable, 1 m, with 1/2″ NPT conduit connector |
| Fail position | Not published on the Belimo data sheet for this model |
| Bridging time | 2 s |
| Pre-charging time | 5 to 20 s |
| Angle of rotation | 90°, adjustable with mechanical stop |
| Running time (motor) | 75 s / 90° |
| Running time fail-safe | <60 s |
| Sound power level, motor | 35 dB(A) |
| Position indication | pointer |
| Degree of protection IEC/EN | IP40 |
| Degree of protection NEMA/UL | NEMA 2 |
| Enclosure | UL Enclosure Type 2 |
| Agency listing | cULus acc. to UL60730-1A/-2-14, CAN/CSA E60730-1:02; CE acc. to 2014/30/EU and 2014/35/EU |
| Quality standard | ISO 9001 |
| UL 2043 | Suitable for use in air plenums per Section 300.22(C) of the NEC and Section 602 of the IMC |
| Ambient humidity | Max. 95% RH, non-condensing |
| Ambient temperature | 35 to 104°F [2 to 40°C] |
| Storage temperature | -40 to 176°F [-40 to 80°C] |
| Housing material | UL94-5VA |
| Actuator weight | 0.54 lb [0.25 kg] |
Field Flow Setting (End Stop Clip)
| Clip position | Cv (V'max) |
|---|---|
| 1 | 0.1 |
| 3- | 0.2 |
| 4+ | 0.4 |
| 5+ | 0.6 |
| 6 | 0.8 |
| N | 1.2 |
| No end stop | 1.4 |
Clip values are from the Z2050Q(S)(PF)-F row of Belimo Quick Mount Visual Instruction Manual 71694-00001.K. CQK manual 71775-00001.L prints the same row as Z2050Q(S)-F without the PF designation.
Documentation
Related Products
Belimo Z2050QPF-F+CQKBUP-LL (electronic fail-safe, 100-240 VAC, Fails Open)
Belimo Z2050QPF-F+CQKBUP-RR (electronic fail-safe, 100-240 VAC, Fails Closed)
Belimo Z2050QPF-F+CQKX24 (electronic fail-safe, 24 VAC/DC, customizable)
Belimo Z2050QPF-F+CQKX24-S (electronic fail-safe, 24 VAC/DC, customizable)
Frequently Asked Questions
What is the Belimo Z2050QPF-F+CQKXUP?
It is a Belimo Z2050QPF-F 2-way, 1/2″ press fit ZoneTight zone valve (Cv 1.4) supplied with the CQKXUP electronic fail-safe actuator, 100-240 VAC, on/off control.
What are the pressure ratings of the Z2050QPF-F+CQKXUP?
Belimo publishes a 250 psi body pressure rating, 75 psi close-off pressure and a 40 psi maximum differential pressure, with 0% leakage.
What is the fail position of the Z2050QPF-F+CQKXUP?
A fail position is not printed on the Belimo data sheet for the CQKXUP. Confirm the required fail position with ZOT Supply before ordering.
Can the maximum flow of the Z2050QPF-F+CQKXUP be reduced in the field?
Yes. Moving the end stop clip sets the maximum Cv between 0.1 at position 1 and 1.2 at position N, or 1.4 with no end stop.
What does Customizable Product mean for the Z2050QPF-F+CQKXUP?
The CQKXUP is an X model actuator. Belimo directs ordering X model actuators for a factory clip setting. Choose the position with the Factory Clip Setting option on this page and the assembly is supplied with the end stop clip set to that maximum Cv.
Belimo warrants all components of the ZoneTight valve and actuator assembly for 5 years from the date of production. Warranty terms are stated in the Belimo Zone Valve Guide Specifications (rev. July 22, 2025). Operating the valve above its 212°F fluid temperature rating voids the manufacturer warranty.
- Valve Pattern:
- 2-Way
- Valve Size:
- 1/2 Inch
- Connection Type:
- Press Fit
- CV Rating:
- 1.4
- Actuator Type:
- Fail-Safe
- Voltage:
- 100-240VAC
- Control Signal:
- On/Off
- Auxillary Switch:
- None
