Z2050QS-F+CQKB24-SR-LL
Details
Details
Z2050QS-F+CQKB24-SR-LL 1/2 in. 2-Way Zone Valve with Electronic Fail-Safe Actuator, NO/FO, 24 VAC/DC, 2-10V
Controls chilled or hot water, up to 60% glycol.
Ships set to normally open and fail open (NO/FO).
Needs the ZG-R01 500 ohm resistor for a 4-20mA signal.
Order Z2050QS-F+CQKB24-SR-RR for the normally closed, fail closed version.
Key Features
- Cv: 1.4
- Close-off pressure: 75 psi
- Running time (motor): 75 s
Product Specifications
| Manufacturer | Belimo |
|---|---|
| Model | Z2050QSFCQKB24SRLL (Z2050QS-F+CQKB24-SR-LL) |
| Valve | Z2050QS-F |
| Valve type | Zone Valve, 2-way, Sweat |
| Valve size | 0.5 in. (DN 15) |
| Fluid | chilled or hot water, up to 60% glycol |
| Fluid Temp Range (water) | 36 to 212 deg F (2 to 100 deg C) |
| Close-off pressure | 75 psi |
| Max differential pressure | 40 psi |
| Flow characteristic | equal percentage |
| Leakage rate | 0% |
| Valve operating range | 15 to 90 deg |
| Pipe connection | Sweat |
| Installation orientation | upright to horizontal (in relation to the spindle) |
| Servicing | maintenance-free |
| Flow Pattern | 2-way |
| Controllable flow range | 75 deg |
| Valve body | forged brass |
| Stem | brass |
| Stem seal | EPDM O-ring |
| Seat | PTFE, O-Ring EPDM |
| O-ring | EPDM (lubricated) |
| Ball | chrome plated brass |
| Suitable actuators, non fail-safe | CQB(X) |
| Suitable actuators, electronic fail-safe | CQKB(X) |
| Cv | 1.4 |
| Body Pressure Rating | 360 psi |
| Flow direction | both directions |
| Dimensions with CQK actuator | A 4.9 in. (125 mm), B 2.7 in. (69 mm), C 3.3 in. (83 mm), D 2.7 in. (69 mm), E 1.0 in. (25 mm), F 1.0 in. (26 mm) |
| Valve weight | 0.37 lb (0.17 kg) |
| Actuator | CQKB24-SR-LL |
| Actuator type | Modulating, Electronic fail-safe, 24 V |
| Normal position | Normally open (NO) |
| Fail position | Fail open |
| Nominal voltage | AC/DC 24 V |
| Nominal voltage frequency | 50/60 Hz |
| Nominal voltage range | AC 19.2 to 28.8 V / DC 21.6 to 28.8 V |
| Power consumption in operation | 2.5 W |
| Power consumption in rest position | 0.5 W |
| Transformer sizing | 5 VA |
| Overload Protection | electronic throughout 0 to 90 deg rotation |
| Electrical Protection | actuators are double insulated |
| Operating range Y | 2 to 10 V |
| Operating range Y note | 4 to 20 mA w/ ZG-R01 (500 ohm, 1/4 W resistor) |
| Input impedance | 100k ohm for 2 to 10 V (0.1 mA), 500 ohm for 4 to 20 mA |
| Position feedback U | 2 to 10 V |
| Bridging time (PF) | 2 s |
| Pre-charging time | 5 to 20 s |
| Angle of rotation | 90 deg |
| Actuator angle of rotation note | adjustable with mechanical stop |
| Running time (motor) | 75 s / 90 deg |
| Running time fail-safe | <60 s |
| Sound power level motor | 35 dB(A) |
| Sound power level, fail-safe | 35 dB(A) |
| Position indication | pointer |
| Power source UL | Class 2 Supply |
| Degree of protection NEMA/UL | NEMA 2 |
| Housing | 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 to 104 deg F (2 to 40 deg C) |
| Storage temperature | -40 to 176 deg F (-40 to 80 deg C) |
| Actuator weight | 0.55 lb (0.25 kg) |
| Housing material | UL94-5VA |
| Wire colors | 1 = black, 2 = red, 3 = white, 5 = orange |