OWP-BL3000H-A3-1 Electronic Coolant Circulation Pump — 3 kW / 400 L/min @ 25 m Head, for CDU

OWP-BL3000H-A3-1 Electronic Coolant Circulation Pump — 3 kW / 400 L/min @ 25 m Head, for CDU (Coolant Distribution Unit)

1. Specifications

2. Application
The stated application scenario is the CDU — Coolant Distribute Unit. Within a liquid-cooling architecture, a CDU conditions and distributes coolant between the facility side and the technology cooling loop, regulating flow, pressure, and temperature delivered to downstream heat-exchange devices.
In this role, the circulation pump must sustain its duty point against the combined resistance of manifolds, piping, and cold plates. The rated point of 400 L/min at 25 m head is suited to secondary coolant loops with moderate-to-high hydraulic resistance, while the -0.9 bar to 10 bar system pressure window covers both negative-pressure loop designs and conventional pressurized loops.
Media compatibility with deionized water and antifreeze matches the fluids commonly circulated in such loops. The RS485 interface allows the CDU controller to supervise pump operation as part of loop-level regulation.

3. Main Points & Industry Demands
As heat density in liquid-cooled equipment continues to rise, the CDU is expected to move larger coolant volumes while holding a stable differential pressure, which places the pump's flow-at-head capability — here 400 L/min at 25 m — at the center of selection. Because CDUs typically run continuously, the friction pair and motor architecture must support long unattended service, consistent with the ≥ 20000 h life rating. Leak prevention is a structural requirement wherever coolant circulates near energized electronics, favoring seal-less canned designs over mechanically sealed pumps. Equipment-room and cabinet-level deployments impose acoustic limits, addressed by the ≤ 70 dB specification at 1 m. Deployment environments vary widely — outdoor cabinets, edge sites, and high-altitude locations — which is reflected in the -40 °C to 85 °C temperature range, 5–95 % humidity tolerance, IP67 enclosure, and ≤ 5000 m altitude rating. Deionized water imposes strict material discipline on wetted parts to protect fluid quality, and loop-level digital supervision increasingly assumes a standard field interface, provided here by RS485.

4. Product Advantages as Core Solutions

• Canned centrifugal design — no leakage risk. By eliminating the dynamic shaft seal, the dominant leak path in conventional pumps is removed. This directly supports the -0.9 bar to 10 bar system pressure range and protects both coolant quality and adjacent equipment in CDU installations.
• Brushless permanent magnet synchronous motor — compact and efficient. The 3000 W drive is packaged in an 8 kg unit, supporting dense CDU layouts. High motor efficiency limits the parasitic heat added to the coolant loop and reduces electrical overhead per unit of delivered flow.
• Closed twisted impeller — high flow, high efficiency, low noise. The impeller geometry underpins the 400 L/min @ 25 m duty point while keeping noise at or below 70 dB at 1 m, meeting the acoustic expectations of equipment-room deployment without external attenuation measures.
• Ultra-long-life friction pair in the shaft system. Bearing wear governs pump longevity in continuous duty. The selected friction-pair materials support the ≥ 20000 h service-life rating, reducing maintenance interventions and supporting the availability expectations of CDU-based cooling infrastructure.

5. Operational Mechanism
The permanent magnet synchronous motor drives a closed twisted impeller. Rotational energy is converted into coolant pressure and flow by centrifugal action: fluid enters the impeller eye, is accelerated along the blade passages, and is discharged at elevated pressure toward the φ64 mm outlet.
As a canned (shielded) centrifugal pump, the rotor assembly operates immersed in the pumped fluid while the stator is isolated by a shielding sleeve; there is no dynamic seal between the wet and dry sections. The circulating fluid also serves the shaft-system friction pair. The closed impeller limits internal recirculation losses, and the twisted blade profile smooths pressure pulsation, contributing to the low-noise characteristic.
Through the RS485 interface, the host controller can issue operating commands and monitor pump status, allowing the CDU to regulate loop flow in coordination with temperature and pressure control.

6. Selection Guide
A common industry rule of thumb allocates 1.5 L/min of coolant flow per 1 kW of heat load. Applied to the rated duty point of 400 L/min, this yields an indicative heat-load capacity of approximately 260 kW (400 ÷ 1.5 ≈ 267 kW).
This figure assumes operation near the rated 25 m head. Actual flow depends on the intersection of the pump curve with the system resistance curve; loops with higher pressure drop will realize lower flow and therefore a lower supportable heat load.
For practical selection, it is advisable to estimate total loop resistance, position the required duty point with reasonable margin below the rated capability, and treat the ≈ 260 kW figure as an upper reference rather than a guaranteed rating. Systems with heat loads broadly in the 150–250 kW range are likely candidates, subject to verification by hydraulic calculation.

7. FAQ

1. Q1: What is the standard delivery lead time, and can the pump be customized for specific CDU interfaces? A: Standard lead time is 20 working days. Customization is supported to match project-specific requirements.
2. Q2: What warranty and service-life expectations apply to this model? A: The product carries a two-year warranty, with a designed working life of 20000 hours or more. Technical support responds quickly to any issues during operation.
3. Q3: Can supply keep pace with volume orders for multi-CDU projects? A: Yes. Monthly production capacity is 10000 units, supporting large-scale deployment schedules.