Liquid Cooling Pumps for Data Center Infrastructure
Liquid cooling pumps circulate coolant through the server-side loop in CDU and rack-level cooling systems. Pump selection — including flow rate, head pressure, motor type, and speed control — directly affects cooling system performance, energy efficiency, and reliability.
How It Works
A centrifugal pump uses a rotating impeller to impart kinetic energy to the fluid, converting it to pressure at the pump outlet. Magnetically coupled pumps use a magnetic drive to transmit torque through the pump housing without a mechanical shaft seal, eliminating the primary leak point. Variable speed pumps adjust flow rate in response to cooling demand, reducing energy consumption at partial load. Redundant pump configurations (N+1 or 2N) ensure cooling continuity if a pump fails.
Applications
- CDU primary coolant circulation
- Rack-level coolant circulation
- Redundant pump configurations for critical cooling
- Variable flow systems with demand-responsive control
- OEM CDU and cooling system assemblies
- AI data center liquid cooling infrastructure
- HPC cluster cooling loops
- Edge data center liquid cooling
Key Technical Specifications
| Pump Types | Centrifugal, magnetically coupled, gear pump |
| Flow Range | 1 to 100+ L/min — application dependent |
| Head Pressure | Up to 10 bar — confirm by pump model |
| Motor Types | AC induction, DC brushless (BLDC), EC motor |
| Speed Control | Fixed speed, PWM, 0–10V analog, Modbus |
| Fluid Compatibility | Water, glycol/water, dielectric fluids |
| Wetted Materials | Stainless steel, PVDF, polypropylene |
| Seal Type | Mechanical seal, magnetic drive (sealless) |
| Power Supply | 24VDC, 48VDC, 110–240VAC — specify requirement |
| Certifications | Options available depending on configuration and manufacturing partner. Please specify project requirements. |
Specifications are indicative. Final parameters depend on manufacturing partner and project configuration. Contact us with your specific requirements.
Available Configurations
- Single pump — standard configuration for non-critical applications
- N+1 parallel pump — one standby pump for automatic failover
- 2N dual pump — fully redundant active-active or active-standby
- Variable speed EC motor — energy-efficient, demand-responsive
- Fixed speed AC motor — simple, low cost
- Magnetically coupled (sealless) — eliminates shaft seal leak risk
- Inline pump — compact, installs directly in pipe run
- Close-coupled pump — motor and pump share a common shaft
Materials
Operating Conditions
- Flow rate: specify required flow rate at the design operating point
- Head pressure: specify system pressure drop at design flow rate
- Fluid temperature: confirm operating temperature range
- Fluid chemistry: confirm glycol concentration and inhibitor package
- Power supply: specify available voltage and frequency
- Control signal: specify speed control interface (PWM, 0–10V, Modbus)
- Redundancy: specify N+1 or 2N requirement and failover logic
Selection Guide
Pump selection requires: (1) Flow rate and head — determine the system curve (pressure drop vs. flow rate) and select a pump whose performance curve intersects the system curve at the design operating point; (2) Fluid compatibility — confirm pump wetted materials are compatible with the coolant chemistry; (3) Motor type — EC motors offer the best energy efficiency for variable flow applications; (4) Seal type — magnetically coupled pumps eliminate the shaft seal as a leak point, which is valuable in data center environments; (5) Speed control — variable speed pumps reduce energy consumption at partial load and allow flow adjustment without throttling valves; (6) Redundancy — specify N+1 or 2N based on the criticality of the cooling application.
OEM & Custom Manufacturing
Custom pump configurations are available for OEM CDU and cooling system manufacturers. Custom options include non-standard flow and head requirements, specific wetted material combinations, integrated speed controllers, custom mounting configurations, and private label manufacturing. Provide your system curve and operating requirements for a pump selection review.
Submit Custom RequirementQuality & Testing
Pumps for data center liquid cooling require performance testing at the specified operating point, leak testing of all wetted connections, and motor insulation testing. Magnetically coupled pumps require verification of the magnetic coupling torque margin. Redundant pump configurations require testing of the automatic failover logic.
Frequently Asked Questions
What is the advantage of a magnetically coupled pump in a data center?
A magnetically coupled (sealless) pump transmits torque through the pump housing using a magnetic coupling, eliminating the mechanical shaft seal. The shaft seal is the most common leak point in conventional pumps. In a data center environment where coolant leaks can damage IT equipment, eliminating the shaft seal significantly reduces leak risk.
How is pump speed controlled in a variable flow cooling system?
Variable speed pumps can be controlled via PWM signal, 0–10V analog signal, or digital protocols such as Modbus. The control signal is typically generated by a CDU controller or BMS based on measured coolant temperatures or differential pressures. EC (electronically commutated) motors offer the best efficiency across the speed range.
What flow rate is required for a GPU cooling loop?
Required flow rate depends on the GPU heat load, coolant inlet temperature, and allowable temperature rise. As a general guide, a 300W GPU cold plate requires approximately 1–2 L/min at a 10°C temperature rise. A full GPU rack with 8 GPUs per server and 10 servers would require 80–160 L/min. Provide your heat load and temperature budget for a specific flow rate calculation.
What is N+1 pump redundancy?
N+1 redundancy means one additional pump is installed beyond the minimum required (N). If one pump fails, the standby pump starts automatically to maintain cooling. This is the standard redundancy level for most data center cooling applications. 2N redundancy (two complete pump systems) is used for the most critical applications.
Need Liquid Cooling Pumps for Your Project?
Send your connection size, coolant type, flow requirements and estimated quantity. Our team will review the application and identify suitable manufacturing options.