2.Key Technical Parameters

Flow range: 10-200m³/h, suitable for 300-20,000-ton vessels

Head: 10-40m, meeting the needs of long-distance freshwater transportation and multi-deck cabin water supply

Efficiency index: Pump efficiency ≥75%, motor energy efficiency class ≥IE3

Hygienic standards: Flow-through component coatings comply with NSF 61 food contact safety certification, no heavy metal precipitation

Temperature adaptability: Stable operation at -10℃~60℃

III. Technical Advantages and Innovative Design

1. Efficient and Clean Water Transportation

Low-turbulence flow channel design: The impeller and volute adopt a streamlined match, reducing water flow disturbance by 40%, avoiding water oxidation and odor generation, and ensuring the taste of domestic water.

Constant pressure water supply technology: Built-in pressure sensor and frequency converter, with flow fluctuation ≤±5%, adapting to the dynamic needs of crew water use during peak and off-peak periods.

2. Reliability in Complex Working Conditions

Anti-vibration structure: The pump body and base adopt elastic shock absorption devices, with a vibration value ≤3.0mm/s, reducing fatigue damage to pipelines caused by ship navigation.

Dry-running protection: Integrated liquid level sensor, automatically stopping when water is insufficient to avoid impeller wear due to idling, extending service life.

3. Long Service Life and Easy Maintenance

Food-grade anti-corrosion process: Flow-through components are sprayed with a ceramic composite coating (thickness 150μm), resisting rust and inhibiting microbial growth, extending the maintenance cycle to 24 months.

Modular quick-release design: The pump cover and motor adopt flange quick connection, reducing the replacement time of core components by 50%, and the maintenance cost is 40% lower than that of stainless steel pumps.

IV. Typical Application Scenarios

1. Ship Domestic Water

Passenger ship freshwater supply: Coastal cruise ships are equipped with ductile iron centrifugal pumps, with a flow rate of 80-150m³/h, providing 24-hour constant temperature water supply for passenger areas with more than 1,000 people, and meeting drinking water standards with purification systems.

Crew living area water supply: Inland cargo ships use gray cast iron pumps, with a flow rate of 20-50m³/h, meeting the low-pressure water needs of kitchens, bathrooms, and other areas.

2. Power System Cooling

Main engine freshwater cooling: Provides cooling make-up water for the main engine of 5,000-ton cargo ships, with a flow rate of 50-100m³/h, and controls the water temperature within 80℃ with heat exchangers.

Generator cooling: The auxiliary generator cooling system uses low-noise cast iron pumps (noise ≤75dB) with a flow rate of 10-30m³/h to ensure stable operation of the equipment.

3. Special Scenario Applications

Engineering ship freshwater storage: Dredgers are equipped with self-priming cast iron pumps with a self-priming height of 8m, quickly injecting port freshwater into cabin storage tanks to meet long-distance operation needs.

Port facility water supply: Fixed freshwater pump stations at wharves use ductile iron pumps with a flow rate of 100-200m³/h to provide freshwater replenishment services for berthed ships.

V. Selection and Maintenance Specifications

1. Key Selection Parameters

Water use type: Choose food-grade coated type for domestic water, wear-resistant type for cooling water, and ductile iron pump for high-pressure needs

Flow calculation: Configure according to 200L/person/day + 1.2 times cooling water consumption; for example, a 500-passenger ship recommends a flow rate of 50-80m³/h

Environmental conditions: Choose pumps with insulated bodies for cold regions, and motors with IP55 protection class for humid environments

2. Maintenance Key Points

Daily monitoring: Check bearing temperature (≤70℃) and outlet pressure (fluctuation ≤±0.1MPa) every 300 hours

Regular maintenance: Clean the suction filter (accuracy ≤5mm) every six months, and replace food-grade lubricating oil (ISO VG46) every year

In-depth maintenance: Conduct a water pressure test (1.3 times the rated pressure) every 4 years, inspect coating integrity, and replace aging seals

VI. Compliance and Certification

International standards: Complies with IMO ISM Code and ISO 8680 ship freshwater system specifications

Classification society certifications: Certified by LR, ABS, CCS, and other institutions

Hygienic certifications: Flow-through components comply with NSF 61 and GB 4806.11 food contact material safety standards