The Belimo EV400SU-317+GKRX24-EV is a 2-way 4" pressure independent characterized control valve (PI-CCV) with integrated thermal energy metering, rated 317 GPM nominal flow, driven by an electronic fail-safe GKRX24-EV actuator. It combines a characterized control valve, an ultrasonic flow sensor, supply and return temperature sensors and a communicating actuator in one assembly, so a single device controls flow, measures delivered energy and reports coil performance over BACnet, Modbus or MP-Bus.
Valve specifications sourced from belimo_EV400SU-317_datasheet_en-us.pdf (Belimo valve-body datasheet, rev 2021-04-14). Belimo does not publish a combined valve-and-actuator datasheet for this configuration, so exact assembly electrical specifications such as operating power and transformer sizing are omitted. Actuator model, supply voltage, communications and fail-safe behaviour are stated below and are sourced. Contact ZOT Supply for assembly electrical data.
Common Applications
- Plant headers and primary or secondary distribution mains
- District energy and plate heat exchanger interfaces, where returning low delta T carries a thermal inefficiency charge
- Large air handling unit coils - Belimo's own AHU case study runs a single 60-ton unit at 240, 144 and 96 GPM depending on control mode
- Branch and riser monitoring on large distributed systems, where energy per branch is logged and alarmed
- Chiller and heat pump performance monitoring - Belimo positions the valve here for transparency on flow and delta T, and specifically does not recommend correcting delta T at the plant, since that can starve individual units
- Applications requiring measured delivered energy, not just valve position
- Low Delta T monitoring and diagnosis at the plant, with remediation applied at the downstream heat exchangers
- Circuits that must drive to a defined safe position on power loss
These are documented Belimo Energy Valve application families, not a manufacturer recommendation for this specific model. This valve is an EV3-generation product, on which design flow (V'max) is adjustable across 30-100% of its 317 GPM nominal flow, giving a selectable range of 95.1 to 317.0 GPM. Any application below is suitable only where the required design flow falls inside that range. Source: belimo_Modbus-Register_Energy-Valve_V3_en-gb.pdf, V'max register range; nominal flow from the exact-model datasheet.
Warranty
Belimo 5-Year Limited Warranty. Coverage is subject to Belimo's applicable Terms and Conditions of Sale and to any product-specific warranty requirements. See Section IX of the Belimo Energy Valve technical documentation for the full terms.
Key Features
Measures delivered energy
An ultrasonic flow sensor plus supply and return temperature sensors compute actual thermal energy through the coil, so the valve reports BTU delivered rather than inferred position.
Pressure independent control
The characterized control valve holds the commanded flow across the stated differential pressure range, so balancing valves and repeat commissioning are not required.
Manages Delta T
Belimo Delta T Manager logic limits flow when the coil is not producing useful temperature difference, addressing Low Delta T Syndrome and reducing pumping energy.
Electronic fail-safe positioning
On loss of supply the actuator drives to its configured fail-safe position using stored energy, with no mechanical spring return.
Technical Specifications
| Valve Pattern | 2-way |
| Valve Size | 4" [100] |
| Nominal Flow (V′nom) | 317 GPM |
| Body Pressure Rating | ANSI Class 125, standard class B |
| Close-off Pressure ∆ps | 175 psi |
| Flow Characteristic | equal percentage or linear |
| Fluid | chilled or hot water, up to 60% glycol max (open loop/steam not allowed) |
| Fluid Temperature | 14...250°F [-10...120°C] |
| Pipe Connection | pattern to mate with ANSI 125 flange / O-ring EPDM (lubricated) |
| Flow Measurement Accuracy | ±2%* |
| Control Accuracy | ±5% |
| Ambient Temperature | -22...122°F [-30...50°C] |
| Ambient Humidity | max. 95% r.H., non-condensing |
| Valve Body Material | Cast iron - GG 25 |
| Seat | PTFE |
| Ball | stainless steel |
| O-ring | EPDM (lubricated) |
Documentation
Related Products
Frequently Asked Questions
What is the nominal flow rate of the Belimo EV400SU-317+GKRX24-EV?
The EV400SU-317+GKRX24-EV is rated 317 GPM nominal flow (V′nom) at a valve size of 4".
Does the Belimo EV400SU-317+GKRX24-EV support BACnet natively?
Yes. BACnet/IP and BACnet MS/TP are integral to the actuator, alongside Modbus TCP, Modbus RTU and MP-Bus. No external protocol gateway is required.
Is the Belimo EV400SU-317+GKRX24-EV fail-safe?
Yes - it uses an electronic fail-safe actuator that drives to a configured position on loss of supply power.
Where do the actuator specifications for the EV400SU-317+GKRX24-EV come from?
Belimo publishes a valve-body datasheet for this configuration rather than a combined valve-and-actuator datasheet, so exact assembly electrical figures such as operating power and transformer sizing are omitted. The actuator model, 24 VAC/DC supply, communications and fail-safe behaviour are sourced and shown above. Contact ZOT Supply for assembly electrical data.
Belimo 5-Year Limited Warranty. Coverage is subject to Belimo's applicable Terms and Conditions of Sale and to any product-specific warranty requirements. See Section IX of the Belimo Energy Valve technical documentation for the full terms.
- Type:
- Energy Valve (PI-CCV)
- Valve Pattern:
- 2-Way
- Valve Size:
- 4 Inch
- GPM:
- 317
- Actuator Type:
- Fail-Safe
- Actuator Model:
- GKRX24-EV
- Voltage:
- 24VAC/DC
- Communication:
- BACnet/Modbus/MP-Bus
- NEMA 4/4X:
- No
- Connection Type:
- Flanged
