Z2050QPT-D Belimo Pressure Independent ZoneTight Valve (½”, 2-Way PIQCV)
The Belimo Z2050QPT-D is a compact, pressure-independent control valve (PIQCV) designed for accurate flow control in closed-loop chilled or hot water systems. Ideal for fan coil units, VAV reheat coils, and radiant panel applications, this valve maintains consistent flow despite pressure fluctuations for improved energy efficiency and comfort.
ZoneTight™ (PIQCV), DN 1/2″ [15], 2-way, GPM 2
Key Features of Z2050QPT-D Belimo Pressure Independent ZoneTight Valve
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Pressure-independent operation ensures stable and accurate flow control
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Equal-percentage flow characteristic for precise modulation
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2-way valve, ½-inch NPT female connection
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Zero leakage when closed for reliable system isolation
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Suitable for hot or chilled water, with glycol mixtures up to 60 percent
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Compact body ideal for tight mechanical spaces
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Maintenance-free design with long service life
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Compatible with Belimo CQ-series actuators
Technical Specifications of Belimo Z2050QPT-D
| Specification | Details |
|---|---|
| Valve Type | 2-Way, Pressure-Independent (PIQCV) |
| Valve Size | ½ inch (DN 15) |
| Flow Rate | 2 GPM (nominal) |
| Flow Characteristic | Equal Percentage |
| Medium | Chilled or Hot Water, up to 60 % glycol |
| Operating Temperature Range | 36 °F to 212 °F (2 °C to 100 °C) |
| Differential Pressure Range | 5 to 50 psi |
| Close-Off Pressure | 200 psi |
| Body Pressure Rating | 360 psi |
| Leakage Rate | 0 % (tight shutoff) |
| Valve Body Material | Forged Brass |
| Stem & Ball Material | Stainless Steel |
| Seat Material | PTFE / EPDM |
| Connection Type | Female NPT |
| Actuator Voltage | 24 VAC / 24 VDC |
| Power Consumption | Approx. 0.3 W (depends on actuator) |
| Rotation Angle | 15° to 90°, adjustable |
| Certifications | UL Recognized, CE Compliant |
Applications of Z2050QPT-D Belimo Pressure Independent ZoneTight Valve
The Z2050QPT-D is engineered for zone-level control in commercial and institutional HVAC systems. Common applications include:
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Fan coil units (FCUs)
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VAV reheat coils
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Radiant heating and cooling panels
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Fin-tube heating systems
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Hydronic balancing and zone control
By maintaining a fixed flow rate regardless of pressure fluctuations, this valve eliminates the need for separate balancing valves and improves overall system efficiency.
Operation & Installation Notes
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Mountable in any upright to horizontal position (avoid inverted installations)
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Tool-free actuator mounting with Belimo CQ-series models
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Compatible with modulating (2–10 V DC) or On/Off control
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Adjustable mechanical stops define flow limits
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No maintenance required under normal operating conditions
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Observe manufacturer torque and pressure limits for best performance
Available Configurations
The Z2050QPT-D is available with multiple actuator options to suit specific control requirements:
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Z2050QPT-D + CQB24-SR-R – Modulating 2–10 V, non-fail-safe
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Z2050QPT-D + CQKB24-SR-RR – Modulating 2–10 V, fail-safe
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Z2050QPT-D + CQKX24 – Configurable On/Off or modulating control
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Z2050QPT-D + CQB24-SR-L – Normally open configuration
Benefits
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Energy Efficiency – Optimizes ΔT and reduces pump energy usage.
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Compact Design – Perfect for tight mechanical spaces and retrofits.
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Precision Control – Eliminates overflow and ensures consistent zone temperatures.
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Reduced Installation Time – Simplifies balancing and commissioning.
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Maintenance-Free Reliability – Built for long-term performance and zero leakage.
| Weight | 2 lbs |
|---|---|
| Dimensions | 8 × 5 × 3 in |
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