The Belimo Z2100QPF-K+CQKBUP-RR is a 1" press fit, 2-way ZoneTight zone valve assembly: the Z2100QPF-K forged brass ball valve (Cv 8.2, 0% leakage, 75 psi close-off) with the CQKBUP-RR electrical fail-safe on/off actuator for AC 100...240 V supply. On power loss it drives to fail position 0% Close. Transformer sizing is 7 VA, and it connects by 19 GA appliance cable, 1 m, with 1/2" NPT conduit connector; the actuator weighs 0.66 lb [0.30 kg].
Suited to large commercial buildings where higher close-off and the ability to change flow are needed. The valve fits space-restricted areas and assembles without tools: the actuator snaps onto the valve by hand, and its mounting orientation can be turned in 180° increments.
Specifications per Belimo Z2100QPF-K technical data sheet rev 2024-12-17; CQKBUP-RR assembly data sheet rev 2024-03-15. Reviewed 2026-10-09.
Best For
- Unit ventilators, fan coil units and VAV reheat coils
- Fin tube casing, radiant panels and duct coils
- Two-position (on/off) zone control
- Zones that must go to 0% Close when power is lost
- Control circuits at AC 100...240 V
Warranty
The valve and actuator carry a 5-year Belimo manufacturer warranty, subject to Belimo's terms and conditions of sale. The warranty becomes invalid if fluid temperature exceeds 212°F because of a boiler control failure: the valve will safely contain the hot water, but valve and actuator replacement is then at the expense of others.
Key Features
Zero leakage ball valve
0% leakage rate, chrome plated brass ball, PTFE seat with EPDM O-rings, equal percentage flow characteristic.
Field adjustable Cv
The end stop clip sets maximum flow in 2.5° increments, up to Cv 8.2 with no end stop.
Electrical fail-safe
Drives to fail position 0% Close on power loss. Bridging time 2 s, fail-safe running time <60 s.
Tool-free snap assembly
Actuator plugs onto the valve by hand; no tools or linkage needed.
Press fit connection
1" press fit ends; flow in both directions; install upright to horizontal.
ZOT Supply is an authorized distributor of Belimo products.
Technical Specifications
Valve: Belimo Z2100QPF-K
| Valve size | 1" [25] |
| Flow pattern | 2-way |
| Pipe connection | Press fit |
| Cv | 8.2 |
| Fluid | chilled or hot water, up to 60% glycol |
| Fluid temp range (water) | 36...212°F [2...100°C] |
| Body pressure rating | 250 psi |
| Close-off pressure Δps | 75 psi |
| Differential pressure Δpmax | 40 psi |
| Flow characteristic | equal percentage |
| Leakage rate | 0% |
| Valve angle of rotation | Operating range 15...90° |
| Controllable flow range | 75° |
| Flow direction | both directions possible |
| Installation orientation | upright to horizontal (in relation to the spindle); not hanging with the stem pointing downwards |
| Flow setting | end stop clip in 2.5° increments; trigger an adaptation on modulating actuators after every change |
| Servicing | maintenance-free |
| Valve body | forged brass |
| Stem | brass |
| Stem seal | EPDM O-ring |
| Seat | PTFE, O-Ring EPDM |
| Ball | chrome plated brass |
| Suitable actuators | Non Fail-Safe CQB(X); Electronic fail-safe CQKB(X) |
| Valve weight | 0.7 lb [0.32 kg] |
| Dimension A | 5.5" [140] |
| Dimensions E / F | 0.9" [24] / 0.9" [24] |
Actuator: Belimo CQKBUP-RR
| Actuator | CQKBUP-RR: On/Off, Electrical fail-safe, 100...240 V |
| Fail position | 0% Close |
| Nominal voltage | AC 100...240 V |
| Nominal voltage frequency | 50/60 Hz |
| Nominal voltage range | AC 85...265 V |
| Power consumption in operation | 2.5 W |
| Power consumption in rest position | 0.5 W |
| Transformer sizing | 7 VA |
| Electrical connection | 19 GA appliance cable, 1 m, with 1/2" NPT conduit connector |
| Overload protection | electronic throughout 0...90° rotation |
| Electrical protection | actuators are double insulated |
| Bridging time (PF) | 2 s |
| Pre-charging time | 5...20 s |
| Angle of rotation | 90° |
| Angle of rotation note | adjustable with mechanical stop |
| Running time (motor) | 75 s / 90° |
| Running time fail-safe | <60 s |
| Noise level, motor | 35 dB(A) |
| Noise level, fail-safe | 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 compliant | 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...104°F [2...40°C] |
| Storage temperature | -40...176°F [-40...80°C] |
| Actuator weight | 0.66 lb [0.30 kg] |
| Housing material | UL94-5VA |
Documentation
FAQ
What is the Cv of the Belimo Z2100QPF-K+CQKBUP-RR?
Cv 8.2 with no end stop. The end stop clip reduces maximum flow in 2.5° increments.
What close-off pressure does the Z2100QPF-K+CQKBUP-RR handle?
75 psi close-off, 40 psi maximum differential pressure and a 250 psi body pressure rating.
What position does the Z2100QPF-K+CQKBUP-RR fail to on power loss?
Fail position 0% Close. The fail-safe running time is <60 s.
What transformer size does the Z2100QPF-K+CQKBUP-RR need?
Transformer sizing 7 VA at AC 100...240 V; 2.5 W in operation and 0.5 W in rest position.
What fluids can the Z2100QPF-K+CQKBUP-RR control?
Chilled or hot water, up to 60% glycol, from 36 to 212°F [2 to 100°C].
- Valve Pattern:
- 2-Way
- Valve Size:
- 1 Inch
- Connection Type:
- Press Fit
- CV Rating:
- 8.2
- Actuator Type:
- Fail-Safe
- Voltage:
- 100-240VAC
- Control Signal:
- On/Off
- Auxillary Switch:
- None
