Hydronic Cooling System Pump Specs

Technical specifications for reliable and efficient chilled water circulation.
Selecting the correct pump specifications is critical for the performance and energy efficiency of a hydronic cooling system. EKG Malaysia provides expert pump sizing and specification services, ensuring your pump matches the system's hydraulic demands, operates at peak efficiency, and integrates seamlessly with chillers, coils, and controls.

Critical Performance Specifications:

• Flow Rate (Q):

  • Unit: Cubic meters per hour (m³/hr) or liters per second (L/s).

  • Determined by: Total cooling load (kW or RT) and design temperature difference (ΔT, typically 5.5°C or 10°F).

  • Formula (Simplified): Flow (m³/hr) = Cooling Load (kW) / (4.18 x ΔT°C)

• Total Dynamic Head (TDH):

  • Unit: Meters (m) or kilopascals (kPa).

  • Components:

    1. Friction Head: Loss through pipes, fittings, valves, strainers.

    2. Equipment Pressure Drop: Chiller evaporator, control valves, cooling coils, balancing valves.

    3. Static Head: Vertical height difference only relevant in open systems (e.g., to a cooling tower). Often zero in closed chilled water loops.

• Pump Type & Configuration:

  • End-Suction (OH1/OH2): Most common for standard duties.

  • Vertical In-line: For space-constrained installations.

  • Split-Case (Double Suction): For high-flow, low-NPSH applications.

  • Variable Primary Flow (VPF) vs. Primary-Secondary: Determines control strategy and pump count.

• Material Specifications:

  • Casing/Impeller: Cast iron (standard), bronze-fitted, or stainless steel (for corrosive water or glycol mixes).

  • Shaft: Stainless steel (AISI 416/304).

  • Mechanical Seal: Carbon/ceramic standard; Silicon Carbide for harsh water.

• Motor Specifications:

  • Power (kW): Sufficient for the pump's power requirement at the duty point with a service factor.

  • Efficiency Class: IE3 (Premium Efficiency) is minimum standard; IE4 (Super Premium) for optimal savings.

  • Voltage/Frequency: 415V, 3-phase, 50Hz (Malaysia standard).

  • Protection: IP55 (indoor) or IP65 (outdoor/washdown); TEFC enclosure.

• Control & Integration:

  • Variable Speed Drive (VFD): Almost always recommended for energy savings. Specify communication protocol (BACnet MS/TP, Modbus).

  • Differential Pressure (ΔP) Sensors: For VFD control in variable flow systems.

  • BMS Integration Points: Status, fault, speed command, pressure/flow feedback.

Our Specification & Design Service:

1. Hydraulic Calculation: We model your system to calculate the accurate system curve and duty point.

2. Pump Selection: We choose a pump whose performance curve intersects the system curve at or near its Best Efficiency Point (BEP).

3. NPSH Check: We verify NPSH Available > NPSH Required to prevent cavitation.

4. Complete Data Sheet: We provide a full pump specification sheet for tendering or purchase.

Avoid costly oversizing and inefficiency.
Correct specs ensure efficient operation, low lifecycle costs, and system reliability.

Contact EKG Malaysia for professional hydronic cooling system pump specification and selection. We provide the technical data you need for a high-performing system.