Designed for demanding industrial and marine applications, the OWP-BL400H-D2-21 stainless steel coolant pump delivers exceptional performance, durability, and versatility. Engineered with premium stainless steel wet parts and advanced protection features, this pump ensures stable operation in extreme environments, making it the ideal choice for electric propulsion yachts, marine engines, generators, and power battery thermal management systems.

1. Superior Durability: Constructed with stainless steel contact parts, the OWP-BL400H-D2-21 resists corrosion and wear, ensuring long-term reliability in harsh marine and industrial conditions. With a service life exceeding 20,000 hours, it minimizes maintenance costs and downtime.
2. Robust Protection System: Equipped with reverse polarity, no-load, locked-rotor, and overvoltage/undervoltage protection, the pump safeguards against operational failures, extending its lifespan and protecting connected equipment.
3. IP68 Waterproof Rating: Fully sealed design enables the OWP-BL400H-D2-21 to operate underwater or in high-humidity environments (-40℃～85℃) without performance degradation, making it suitable for marine applications.
4. Efficient Performance: Delivering 400W rated power and a head of ≥20m at 3000L/h flow rate, the pump ensures rapid and effective heat dissipation, while PWM speed regulation allows precise flow control for optimal thermal management.
5. User-Friendly Design: Flange quick-connect inlets/outlets simplify installation and replacement, while high/low level signal error feedback enables real-time monitoring of operational status.
6. Low Noise Operation: Operating at ≤60dB(A) at 1m distance, the pump provides quiet performance, ideal for noise-sensitive environments such as yachts and generator rooms.

The OWP-BL400H-D2-21 stainless steel coolant pump is specifically engineered to meet the thermal management needs of high-demand applications, where reliability and efficiency are critical:

Marine environments pose unique challenges with saltwater corrosion, extreme temperatures, and constant vibration. The OWP-BL400H-D2-21’s stainless steel wet parts and IP68 protection class ensure resistance to saltwater corrosion and waterproof performance, while its wide operating temperature range (-40℃～85℃) adapts to changing marine conditions. The pump’s high flow rate (3000L/h) and head (≥20m) efficiently circulate coolant to cool marine engines and electric propulsion systems, preventing overheating and ensuring smooth, reliable operation during long voyages. PWM speed regulation allows the pump to adjust flow rates based on engine load, optimizing energy efficiency and reducing fuel consumption.

Generators require consistent thermal management to maintain performance during prolonged operation, especially in remote or harsh environments. The OWP-BL400H-D2-21’s robust construction (＞20000 hours service life) and comprehensive protection functions (reverse polarity, locked-rotor protection) ensure uninterrupted operation, even in dusty or high-humidity conditions. Its low noise level (≤60dB(A)) makes it suitable for residential or commercial generator rooms where noise pollution is a concern. The flange quick-connect design simplifies installation and maintenance, minimizing downtime for generator systems.

With the growing demand for electric vehicles (EVs) and energy storage systems, battery thermal management is critical to ensuring battery safety, performance, and lifespan. The OWP-BL400H-D2-21’s precise PWM speed regulation allows it to adapt to varying thermal loads, maintaining optimal battery temperatures (-40℃～85℃) and preventing thermal runaway. The pump’s high efficiency (400W rated power) and low leakage (＜0.8mL/min) ensure reliable coolant circulation, while its stainless steel material resists chemical corrosion from coolants. High/low level signal error feedback provides real-time alerts for potential issues, enabling proactive maintenance and enhancing battery system safety.

Whether for marine, industrial, or energy storage applications, the OWP-BL400H-D2-21 stainless steel coolant pump combines durability, efficiency, and advanced features to deliver superior thermal management solutions.

Performance

Fault Feedabck Chart

Speed Control Mode

Dimensional Drawings