Belimo Z2050Q+J+CQB24-SRR Actuator
The Belimo Z2050Q-J+CQB24-SR-R is a high-performance 1/2 inch 2-way zone valve assembly engineered for precise hydronic control in space-constrained commercial applications. This ZoneTight QCV assembly features a normally closed configuration and a modulating control signal (2-10 VDC or 4-20 mA with a 500 ? resistor), making it ideal for VAV reheat coils, fan coil units, and radiant panels. The forged brass body and chrome-plated brass ball ensure a zero-leakage seal, significantly reducing energy loss compared to traditional globe valves. With a Cv rating of 5.9 and a 75 psi close-off pressure, this unit maintains reliable operation in systems with up to 60% glycol. The CQB24-SR-R actuator is ultra-efficient, consuming only 0.3W during operation, and features a snap-fit connection for tool-free installation. Technicians can easily field-adjust the flow via the integrated mechanical stop to meet specific design requirements, ensuring the equal percentage flow characteristic matches the coil's thermal demand.
Key Benefits- Zero Leakage: The ball valve design eliminates seat leakage, preventing ghost energy loads and improving system delta-T.
- High Close-Off: Specifically built to handle up to 75 psi close-off, preventing bypass in high-head pressure systems.
- Compact Profile: With an installation height of approximately 4.33 inches, it fits easily into tight HVAC plenum spaces.
- Low Power Consumption: Uses up to 95% less power than conventional thermal or synchronous motor zone valves.
- Field-Adjustable Cv: End-stop clips allow for quick flow rate tuning without replacing the valve body.
Is a resistor required for 4-20 mA control?
Yes, to utilize a 4-20 mA signal with the CQB24-SR-R, you must install a 500 ? resistor (ZG-R01) to convert the signal to 2-10 VDC.
Can this valve be installed in any orientation?
The valve can be mounted from upright to horizontal. It should never be installed with the actuator hanging below the valve body to prevent moisture from entering the motor housing.
What is the fail-safe position of this assembly?
This is a non-spring return (NSR) actuator. In the event of a power loss, the valve will maintain its last position. The "R" designation indicates it is configured as normally closed for control logic.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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Shipping & Returns
Description
The Belimo Z2050Q-J+CQB24-SR-R is a high-performance 1/2 inch 2-way zone valve assembly engineered for precise hydronic control in space-constrained commercial applications. This ZoneTight QCV assembly features a normally closed configuration and a modulating control signal (2-10 VDC or 4-20 mA with a 500 ? resistor), making it ideal for VAV reheat coils, fan coil units, and radiant panels. The forged brass body and chrome-plated brass ball ensure a zero-leakage seal, significantly reducing energy loss compared to traditional globe valves. With a Cv rating of 5.9 and a 75 psi close-off pressure, this unit maintains reliable operation in systems with up to 60% glycol. The CQB24-SR-R actuator is ultra-efficient, consuming only 0.3W during operation, and features a snap-fit connection for tool-free installation. Technicians can easily field-adjust the flow via the integrated mechanical stop to meet specific design requirements, ensuring the equal percentage flow characteristic matches the coil's thermal demand.
Key Benefits- Zero Leakage: The ball valve design eliminates seat leakage, preventing ghost energy loads and improving system delta-T.
- High Close-Off: Specifically built to handle up to 75 psi close-off, preventing bypass in high-head pressure systems.
- Compact Profile: With an installation height of approximately 4.33 inches, it fits easily into tight HVAC plenum spaces.
- Low Power Consumption: Uses up to 95% less power than conventional thermal or synchronous motor zone valves.
- Field-Adjustable Cv: End-stop clips allow for quick flow rate tuning without replacing the valve body.
Is a resistor required for 4-20 mA control?
Yes, to utilize a 4-20 mA signal with the CQB24-SR-R, you must install a 500 ? resistor (ZG-R01) to convert the signal to 2-10 VDC.
Can this valve be installed in any orientation?
The valve can be mounted from upright to horizontal. It should never be installed with the actuator hanging below the valve body to prevent moisture from entering the motor housing.
What is the fail-safe position of this assembly?
This is a non-spring return (NSR) actuator. In the event of a power loss, the valve will maintain its last position. The "R" designation indicates it is configured as normally closed for control logic.
This item is not eligible for free shipping.
Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
