Marine Copper Fuel Pump

I. Product Overview

Marine copper fuel pump is a core power supply equipment specially designed for ship fuel delivery systems, belonging to the positive displacement pump category. Its key components in contact with fuel, such as pump body, impeller, valve core and oil delivery pipeline, are all precision-processed with high-quality brass materials. Driven by an electric motor or hydraulic system, the pump realizes stable and efficient delivery of marine fuels (such as diesel oil, heavy oil, marine gasoline, etc.) by changing the pump chamber volume or relying on centrifugal force. It is a key link to ensure the continuous and stable fuel supply of the main and auxiliary engines of the ship, and directly affects the power output and navigation safety of the ship.

Compared with ordinary cast iron or carbon steel fuel pumps, marine copper fuel pumps, relying on the unique physical and chemical properties of copper materials, have outstanding advantages such as excellent fuel corrosion resistance, oxidation resistance and wear resistance. They can effectively resist the corrosion of sulfur-containing components, additives and moisture in fuel, avoid component failure caused by long-term fuel erosion, and ensure long-term stable operation. 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), American Bureau of Shipping (ABS), and Lloyd's Register (LR), and is widely applicable to fuel delivery systems of various ships such as cargo ships, oil tankers, passenger ships, container ships, offshore drilling platforms, and ocean-going scientific research vessels.

II. Core Technical Parameters

Flow Range: 2-150 m³/h, which can be graded and configured according to the power of the ship's main/auxiliary engines and fuel consumption. The flow stability error under rated working conditions is ≤±2%, ensuring precise matching of fuel supply and consumption.

Pressure Range: 1.0-3.0 MPa, maximum working pressure up to 4.0 MPa, which can meet the high-pressure fuel injection requirements of marine engines and adapt to the resistance loss of long-distance marine fuel pipelines.

Fuel Adaptability: Can stably deliver various fuels such as 0# diesel oil, -10# diesel oil, -20# diesel oil, high-sulfur heavy oil, and marine gasoline; can handle fuel with water content ≤0.5% and impurity content ≤0.1% (particle size ≤0.5mm); the applicable fuel temperature range is -25℃ to 120℃, adapting to the temperature changes of the ship's fuel tank and engine room.

Material Parameters: Pump body, impeller and valve core are made of brass (H62/H65) or bronze (ZCuSn10Zn2); pump shaft is made of 304/316 stainless steel; seals are made of fluoroelastomer (FKM) or perfluoroelastomer (FFKM), which have excellent compatibility with various marine fuels and ensure no leakage during long-term operation.

Drive Mode: Mainly electric drive (three-phase asynchronous motor, protection level IP55/IP65), supporting 220V/380V/440V and other marine standard voltages; large-flow and high-pressure models can be equipped with hydraulic drive to ensure stable power output; the drive system has overload, overheating and phase loss protection functions.

Operating Performance: Self-priming height ≥3 m, self-priming time ≤40 seconds (at a suction lift of 2m); operating noise ≤68 dB(A), vibration acceleration ≤1.2 m/s², complying with marine engine room noise and vibration control standards; volumetric efficiency ≥95%, ensuring high fuel delivery efficiency and low energy consumption.

III. Structural Design and Core Advantages

3.1 Core Structural Design

Full Copper Fuel Contact Structure: All components directly in contact with fuel are precision cast or forged with integral copper materials. The inner wall of the flow channel is smooth and burr-free, which not only reduces fuel flow resistance and pressure loss, but also avoids fuel oxidation and carbon deposition caused by friction between rough surfaces and fuel; at the same time, the copper surface has good anti-adhesion performance, which can prevent the accumulation of impurities in fuel and reduce the risk of pipeline blockage.

High-Pressure Sealing System: Adopts a double sealing structure of mechanical seal + metal gasket. The sealing surface is made of wear-resistant and corrosion-resistant materials such as silicon carbide and tungsten carbide. The leakage rate is ≤0.005 mL/h, ensuring no fuel leakage under high-pressure working conditions; the sealing system is equipped with a temperature monitoring device, which can alarm in time when the sealing surface overheats due to abnormal friction.

Compact and Integrated Design: The pump body and drive unit adopt an integrated design, with small volume and light weight (12-280 kg), suitable for installation in the narrow space of the ship's engine room; it supports both horizontal and vertical installation methods, and the base is equipped with shock-absorbing rubber pads to reduce the resonance impact between pump operation and ship navigation.

Anti-Cavitation and Anti-Clogging Design: The pump inlet is equipped with a pre-filter device to prevent large particles of impurities from entering the pump cavity; the impeller blades are optimized with a special arc design, which can effectively reduce cavitation caused by local low pressure during fuel suction; the gap between the impeller and the pump body is precisely controlled to avoid jamming caused by thermal expansion and contraction or impurity accumulation.

3.2 Core Technical Advantages

Excellent Fuel Corrosion Resistance: Copper materials (brass/bronze) have extremely strong corrosion resistance to various marine fuels, especially to high-sulfur heavy oil and fuel additives. After 3000 hours of immersion test in high-sulfur heavy oil, there is no obvious corrosion, pitting or deformation. The service life is 2.5-3 times that of ordinary cast iron fuel pumps, greatly reducing the frequency of equipment replacement.

Stable and Efficient Fuel Supply: Optimized hydraulic design and precision processing technology ensure that the pump has high volumetric efficiency and mechanical efficiency. Even under the conditions of ship heeling (±35°) and trimming (±25°), it can still maintain stable flow and pressure output, ensuring continuous and sufficient fuel supply to the engine, and avoiding power fluctuations or shutdown caused by unstable fuel supply.

Safety and Reliability: Equipped with multiple safety protection devices such as overload protection, overheating protection, low oil level protection and fuel leakage alarm. When abnormal conditions such as pump overload, excessive temperature, insufficient fuel or leakage occur, the system will automatically shut down and send an alarm signal, ensuring the safety of the ship's power system and avoiding fire or explosion risks caused by fuel leakage.

Convenient Maintenance and Low Cost: Key components adopt modular design. Wearing parts such as seals and filters can be quickly disassembled and replaced without disassembling the entire pump body; daily maintenance only needs to regularly clean the filter and check the sealing condition, without professional tools, and the maintenance time is ≤25 minutes; copper material components have good wear resistance and long service life, reducing ship operation and maintenance costs.

Environmental Compliance: The pump operates without leakage, avoiding marine environmental pollution caused by fuel leakage; the materials used comply with the environmental protection requirements of Annex VI to the IMO MARPOL Convention, do not contain harmful heavy metals, and the waste oil and waste parts after maintenance can be recycled, meeting the requirements of green ship navigation.

IV. Typical Application Scenarios

4.1 Ship Main Engine Fuel Supply System

As the core power supply equipment of the ship's main engine, the marine copper fuel pump is responsible for delivering fuel from the ship's fuel tank to the main engine's fuel injection system. It can stably deliver various fuels such as diesel oil and heavy oil required by the main engine, adapt to the variable load conditions of the main engine during ship navigation (such as acceleration, deceleration and full-load operation), ensure precise matching of fuel supply and engine demand, and guarantee stable power output and economic operation of the main engine.

4.2 Ship Auxiliary Engine Fuel Supply System

In the fuel supply system of ship auxiliary engines (generator sets, air compressors, etc.), the marine copper fuel pump provides continuous and stable fuel supply for the auxiliary engines. The auxiliary engines are characterized by frequent start-stop and variable loads. The excellent starting performance and flow stability of the pump can meet the fuel demand of the auxiliary engines under different working conditions, ensuring the normal operation of the ship's power generation, air supply and other auxiliary systems.

4.3 Inter-Tank Fuel Transfer of Ships

During ship navigation or berthing, it is often necessary to transfer fuel between different fuel tanks (such as from the storage tank to the daily fuel tank). Marine copper fuel pump has the advantages of stable pressure and adjustable flow, which can realize safe and efficient inter-tank fuel transfer. The corrosion resistance of copper material to fuel ensures no leakage during the transfer process, avoiding fuel waste and safety risks.

4.4 High-Pressure Fuel Injection System for Special Ships

For special ships such as oil tankers, chemical tankers and offshore drilling platforms, their engines often require high-pressure fuel injection. Marine copper fuel pump can provide stable high-pressure fuel supply, adapt to the harsh working environment of high salt spray and strong vibration on offshore platforms, and ensure the normal operation of the engine; at the same time, the corrosion resistance of copper material can resist the erosion of marine atmosphere and salt spray, extending the service life of the pump.

4.5 Emergency Fuel Supply System

Marine copper fuel pump can be used as the core equipment of the ship's emergency fuel supply system. When the main fuel supply system fails, the emergency fuel pump can be started quickly to provide fuel for the main engine or auxiliary engine, ensuring that the ship can maintain basic navigation power or emergency power supply, gain time for the maintenance of the main system, and ensure the safety of the ship and personnel.