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What are the key considerations when selecting an electric water pump?
Release Date:
2026-03-11
First determine the flow rate and head, then select the voltage control. Consider the medium’s temperature resistance and the interface installation. Prioritize long-life sealing and ensure curve matching.
I. Core Performance Parameters
Traffic
Meet the system’s maximum heat dissipation and circulation requirements, with a 10%–20% margin.
Head
Overcome pipeline resistance, elevation difference, and heat exchanger pressure drop.
Work location
Ensure the pump operates at its rated point within the most efficient range, and avoid prolonged operation at extremely low flow rates and high head.
II. Electrical Requirements
Voltage: 12V/24V/48V (24V is commonly used in vehicles)
Power: Match the wiring harness, fuses, and power supply capacity.
Control Method
PWM speed control
LIN / CAN / CAN FD
Digital on/off control
Feedback signals: speed feedback, fault feedback (stall, overtemperature, overcurrent)
III. Medium and Environment
Medium
Pure water / Ethylene glycol coolant / Other liquids
Pay attention to corrosion resistance, lubricity, and sealing performance.
Temperature range
Operating temperature: -40°C to 120°C, common
Consider the medium temperature and ambient temperature separately.
Protection Level
Automotive and industrial applications generally require IP67 or higher.
IV. Structure and Installation
Interface dimensions: pipe diameter, threads, flange
Installation orientation: horizontal / vertical / inclined—allowed?
Weight and Volume: Space Allocation and Vibration Effects
Sealing method: Long-term leak-proof performance is the core.
V. Reliability and Lifespan
Lifespan: Typically required to be ≥20,000 hours
Bearings / Shaft Seals: Brushless Motors Are More Reliable
Vibration resistance, shock resistance, and EMC: must be met in automotive and industrial applications.
VI. System Matching (the Easiest to Overlook)
Pump curve matching the system resistance curve
Avoid cavitation, resonance, and excessive noise.
Start-Stop Control Strategy: Delay and Protection Logic
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Zhejiang Huangyan Tiansheng Automotive Parts Co., Ltd.
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Email:tasn@zjtasn.com
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