Marine Copper Bilge Pump

I. Product Overview

The marine copper bilge pump is a core drainage equipment specially designed for the discharge of ship bilge water. It belongs to the centrifugal pump category, and the core flow channel components (impeller, pump body, pump cover) are precision-processed with high-quality brass or bronze materials. Driven by an electric motor, the pump rotates the impeller at high speed to generate centrifugal force, which quickly extracts and discharges media such as oily sewage, seawater, and sediment-mixed water accumulated at the ship's bilge out of the ship. It is a key equipment to ensure ship stability and prevent bilge water from corroding the hull structure.

Compared with ordinary cast iron or carbon steel bilge pumps, the marine copper bilge pump, relying on the excellent seawater corrosion resistance, pitting resistance, and anti-biofouling performance of copper materials, can long-term adapt to the harsh environment of the ship's bilge which is humid, high in salt spray, and complex in media, effectively avoiding drainage failure caused by component corrosion. The product strictly complies with international and domestic standards such as the International Convention for the Safety of Life at Sea (SOLAS), ISO 15749 Marine Pump Standard, and GB/T 10832 Marine Pump Technical Requirements. It has obtained certifications from mainstream classification societies such as China Classification Society (CCS) and American Bureau of Shipping (ABS), and is widely applicable to the bilge water discharge systems of various ships such as cargo ships, oil tankers, passenger ships, container ships, fishing boats, and yachts.

II. Core Technical Parameters

Flow Range: 5-200 m³/h, which can be graded and configured according to the ship's tonnage (500-100000 DWT) and bilge volume. The flow stability error under rated working conditions is ≤±3%, ensuring rapid emptying of bilge water.

Head Range: 8-50 m, maximum working pressure ≤1.0 MPa, which can meet the bilge water lifting and discharge requirements of ships with different draft depths and adapt to the resistance loss of the ship's bilge pipeline.

Medium Adaptability: Can convey oily sewage, seawater, fresh water, sediment-mixed water (solid content ≤3%, particle size ≤1mm), a small amount of oil stains and corrosive media; the applicable medium temperature range is -10℃ to 80℃, which can withstand the alternating high and low temperature environment of the ship's bilge.

Material Parameters: The impeller, pump body and pump cover are made of brass (H62/H65) or bronze (ZCuSn10Zn2), the pump shaft is made of stainless steel (304), and the seal is made of fluoroelastomer (FKM), ensuring corrosion resistance, wear resistance of materials and compliance with ship environmental protection requirements.

Drive Mode: Mainly electric drive (three-phase asynchronous motor, protection level IP55/IP65), supporting 220V/380V/440V and other ship standard voltages; some small models can be adapted to pneumatic drive to meet the use requirements of explosive-proof areas.

Operating Performance: Net Positive Suction Head (NPSH) ≤2.5 m, self-priming height ≥4 m, self-priming time ≤50 seconds (at a suction lift of 3m); operating noise ≤70 dB(A), vibration acceleration ≤1.5 m/s², complying with the noise control standards for ship cabins.

III. Structural Design and Core Advantages

3.1 Core Structural Design

Full Copper Flow Channel Structure: The core components in contact with the medium, such as the impeller and pump body, are precision cast/forged with integral copper materials. The flow channel is smooth and burr-free, which reduces hydraulic loss and avoids corrosion and wear of components by the medium; the surface of copper materials is not easy to breed marine organisms (such as shellfish, algae), reducing the risk of pipeline blockage.

Efficient Sealing System: Adopts a double sealing structure of mechanical seal + skeleton oil seal, the sealing surface material is silicon carbide-graphite, and the leakage rate is ≤0.01 mL/h; equipped with a sealed cooling and flushing channel to prevent oil stains and impurities in the bilge water from adhering to the sealing surface, extending the service life of the seal.

Compact Installation Design: Supports horizontal and vertical installation methods, with small volume and light weight (15-300 kg), suitable for installation in the narrow space of the ship's bilge; the base is equipped with shock-absorbing rubber pads to reduce the impact of operating vibration on the hull structure.

Anti-clogging Impeller Design: The impeller adopts an open or semi-open structure, and the blade curvature is optimized, which can easily pass through small impurities such as sediment and fibers, avoiding impeller jamming; the gap between the impeller and the pump body is reasonable, reducing the occurrence of cavitation.

3.2 Core Technical Advantages

Super Strong Corrosion and Pollution Resistance: Copper materials (brass/bronze) have excellent seawater corrosion resistance, pitting resistance and anti-biofouling performance, no rust in 2000-hour salt spray test, and can operate continuously for more than 8000 hours without failure in oily and sandy bilge water media. The service life is 2-3 times that of ordinary cast iron bilge pumps.

Efficient Drainage Capacity: The optimized hydraulic design makes the pump's hydraulic efficiency ≥80% and total efficiency ≥75%, which can quickly extract bilge water. Even under low liquid level conditions, it can stably absorb and drain water, avoiding hull weight gain and stability decline caused by bilge water accumulation.

Safe and Reliable Operation: Equipped with multiple safety devices such as overload protection, water shortage protection, and temperature protection. When the motor is overloaded, the pump runs dry, or the temperature exceeds 140℃, it will automatically shut down and alarm; the electrical part complies with the ship's explosion-proof standard (Ex d IIB T4), suitable for use in dangerous areas such as engine rooms and cargo holds.

Convenient Maintenance and Low Cost: The key components adopt a modular design, and wearing parts such as impellers and seals can be quickly disassembled and replaced. Daily maintenance does not require professional tools, and the maintenance time is ≤30 minutes; copper material components are not easy to damage, reducing the frequency of spare parts replacement and lowering ship operation and maintenance costs.

Environmental Compliance: The pump operates without leakage, avoiding marine environmental pollution caused by bilge water leakage; the materials comply with the environmental protection requirements of Annex VI to the IMO MARPOL Convention, do not contain harmful heavy metals, and meet the ship's green navigation standards.

IV. Typical Application Scenarios

4.1 Main Bilge Water Drainage System of Ships

As the core equipment for ship bilge water discharge, the marine copper bilge pump is responsible for discharging oily sewage, rainwater, seawater, and sediment-mixed water accumulated at the bottom of various compartments such as the ship's engine room, cargo hold, ballast tank, and fresh water tank. The full copper material has strong corrosion resistance, can adapt to the medium environment of different compartments, and efficient drainage ensures the bilge is dry, avoiding hull steel plate corrosion and cabin equipment damage caused by water accumulation.

4.2 Special Drainage for Fishing Vessels/Aquaculture Vessels

On fishing vessels, aquaculture vessels and other ships that operate in coastal or ocean areas for a long time, the bilge water is likely to contain highly corrosive media such as fishing residues, aquaculture feed residues, and high-salinity seawater. Relying on its excellent corrosion resistance and anti-clogging performance, the marine copper bilge pump can stably discharge such complex media, avoid pump corrosion and blockage, and ensure the normal operation of the ship.

4.3 Bilge Drainage for Yachts/Luxury Passenger Ships

Yachts and luxury passenger ships have high requirements on the operating noise, stability and appearance of bilge pumps. The marine copper bilge pump has low operating noise and small vibration, which will not affect the rest of the cabin personnel; the full copper material has a beautiful appearance and strong corrosion resistance, adapting to the high-end use needs of yachts and passenger ships, and ensuring the safe and reliable discharge of bilge water.

4.4 Emergency Drainage Scenarios

When a ship encounters heavy sea conditions, collisions or groundings leading to a large amount of water ingress in the bilge, the marine copper bilge pump can be used as an emergency drainage equipment to quickly extract the bilge water, help the ship maintain stability, and gain time for emergency disposal. Its reliable operating performance and efficient drainage capacity are an important part of the ship's emergency safety guarantee.

4.5 Bilge Drainage for Offshore Platforms

In the bilge drainage systems of marine engineering equipment such as offshore drilling platforms and offshore wind power platforms, the marine copper bilge pump can adapt to the harsh marine environment of the platform and discharge seawater, rainwater and oil-stained mixed water accumulated at the bilge. The copper material has strong anti-biofouling performance, avoiding blockage of the pump pipeline by marine organisms during long-term platform operation, and ensuring the safe operation of the platform.