Providing Reliable Fluid Solutions for Ocean-Going Vessels

Case Study: OCEAN ROUTE SHIP STORE CO.,LTD| Providing Reliable Fluid Solutions for Ocean-Going Vessels

Industry Background: Fluid Conveyance Challenges in Marine & Offshore Applications

In the marine and offshore engineering sector, fluid conveyance often faces complex operating conditions, diverse media (such as sewage, bilge water, oil sludge, chemicals, etc.), and stringent safety requirements. Traditional electric pumps present two major hazards in marine environments: first, electrical equipment may generate sparks in hazardous areas such as oil tanks and decks; second, worn shaft seals can cause media leakage, polluting the environment and endangering personnel safety.

The Solution: Performance Advantages of the QBY3-32/40 Air-Operated Double-Diaphragm Pump

To address these pain points, Ningbo Haizhidao Marine Supplies Co., Ltd. has introduced the QBY3-32/40 air-operated double-diaphragm pump as the standard supporting equipment for marine bilge water treatment, oil tank cleaning, and chemical transfer. With its outstanding performance curves and technical parameters, this pump model perfectly adapts to marine operating conditions:

1. Explosion-Proof Safety – The Preferred Choice for Marine Use
   Powered by compressed air rather than electricity, this pump fundamentally eliminates the risk of electrical sparks. During operations such as tank washing and pump-room sludge removal on oil tankers, it can safely convey flammable and volatile media, fully meeting the high explosion-proof requirements of marine vessels.

2. Powerful Self-Priming Capability for Complex Media
   Based on performance curve data and field measurements, the QBY3-32/40 delivers a maximum working pressure of 0.84 MPa (approx. 8.4 bar) and a maximum flow rate of 45 gpm (approx. 170 L/min). With a maximum self-priming lift of 5.48 meters and the ability to pass solid particles up to 3.2 mm in diameter, combined with the low-shear characteristics inherent to diaphragm pumps, this model can efficiently handle bilge water containing oil sludge and small particulates while maintaining minimal pump wear and withstanding dry running without damage.

3. Zero-Leakage Design – Protecting the Marine Environment
   The pump utilizes diaphragms to completely isolate the media from moving parts, with no rotating components or dynamic shaft seals, effectively eliminating "leakage, drip, and spill" issues. When transferring toxic chemicals or high-viscosity heavy fuel oil, it ensures operator safety while preventing pollutant discharge into the sea, fully complying with environmental regulations set by the International Maritime Organization (IMO).

4. Flexible Adjustment for Wide-Ranging Operating Conditions
   Marine operations often require variable flow and pressure demands. The QBY3 series pump enables stepless speed regulation by simply adjusting the air valve opening. When the discharge valve is closed, the pump automatically reaches pressure balance and stops, preventing excessive energy consumption or overheating – delivering both energy efficiency and operational stability.

Customer Feedback & Results

Ningbo Haizhidao Marine Supplies Co., Ltd. has reported that after integrating the QBY3-32/40 pump into their marine supporting solutions, end-user shipowners have confirmed significant improvements in operational safety. Particularly during oil tanker cleaning operations, the pump's strong self-priming capability easily extracts residual mixed liquids from tank bottoms. The flexible material options – aluminum alloy, stainless steel, and ductile iron – effectively address the differentiated needs of seawater-corrosive environments and chemical-handling applications.

Conclusion

As the maritime industry transitions toward "safe, green, and efficient" operations, the QBY3-32/40 air-operated double-diaphragm pump offers a cost-effective solution for marine fluid management, featuring electric-free explosion protection, dry-run-resistant self-priming, and zero-leakage sealing. Ningbo Haizhidao is committed to providing reliable Chinese-manufactured equipment to shipowners worldwide, ensuring safe and worry-free ocean voyages.