Marine Hand Fuel Pump

I. Product Overview

Marine Hand fuel pump is a core key equipment of the ship's emergency fuel transportation system. It adopts the positive displacement conveying principle driven by a manual crank, forming negative pressure for oil suction and positive pressure for oil discharge through the reciprocating/rotational movement of the piston or rotor, so as to realize the stable transportation of fuel media such as diesel oil, heavy fuel oil (HFO), and lubricating oil. The core advantage of the product lies in its no need for electric drive; it can complete operations relying solely on human power. It has the characteristics of compact structure, portability, simple operation, and strong resistance to harsh environments. It is the core of emergency guarantee when the ship is powered off or the main and auxiliary engine fuel pumps fail. At the same time, it can be used in conventional auxiliary scenarios such as fuel transfer between tanks, fuel filtration and circulation, and fuel supply for lifeboats. The main body is made of wear-resistant and corrosion-resistant materials such as high-strength cast iron, 316L stainless steel, and aluminum alloy. The seals are made of nitrile rubber (NBR) or fluororubber (FKM). It is suitable for medium temperatures ranging from -30℃ to 120℃ with a service life of ≥8 years. Fully complying with IMO "Code for the Safety of Ship Emergency Systems" (MSC.472(99)), ISO 15749 Marine Positive Displacement Pump Standard, and having obtained type approval from mainstream classification societies such as CCS, LR, ABS, and RS, it is widely used in emergency fuel systems and auxiliary fuel transportation scenarios of various ships such as cargo ships, oil tankers, passenger ships, fishing boats, research vessels, and engineering ships.

II. Core Technologies

1. Key Technical Parameters

Flow Range: 0.5-15m³/h, adjusted according to crank speed (30-60r/min) and pump body specifications. A single person operating at a constant speed can stably output more than 85% of the rated flow

Output Pressure: 0.4-1.6MPa, which can meet different pressure requirements such as emergency start-up fuel supply for main engines (1.0-1.6MPa), fuel transfer between tanks (0.6-1.0MPa), and fuel supply for lifeboats (0.4-0.6MPa)

Medium Compatibility: Capable of transporting No. 0 diesel oil, No. -10 diesel oil, heavy fuel oil (HFO, viscosity ≤1000cSt), 46-150# lubricating oil, and fuel media with solid content ≤0.5% (particle size ≤1mm)

Self-priming Performance: Self-priming height ≥3.0m, priming time ≤50 seconds (for diesel oil). It can start without priming and directly suck liquid from the low-lying emergency fuel tank of the ship

Operation Intensity: Crank torque ≤15N·m, a single person can operate continuously for more than 30 minutes without obvious fatigue, adapting to operators of different physical strengths

Overall Dimensions: Small portable type (300×200×180mm), conventional type (500×350×250mm), weight 2-12kg, easy to store and move in narrow spaces such as engine rooms and lifeboats

2. Safety Protection Design

Anti-backflow Protection: A one-way valve is built in the outlet with an opening pressure ≤0.05MPa, which can effectively prevent fuel backflow and avoid secondary failures caused by medium backflow during transportation

Dual Seal Protection: Adopts a dual seal structure of mechanical seal + O-ring. The sealing surface is made of silicon carbide-graphite paired materials with a leakage rate ≤0.01mL/h, complying with the ship emergency seal standard

Vibration and Impact Resistance: The pump body and base are elastically connected, which can withstand ship heel ±30°, trim ±20°, and vibration acceleration of 15g, with flow attenuation ≤5%

Explosion-proof Adaptation: Fuel-contacting components are made of anti-static materials. Optional Ex d IIB T4 Gb explosion-proof type (suitable for Zone 2 hazardous areas near fuel tanks) with no ignition risk

Overload Protection: A torque limiter is built in the crank, which automatically slips when the operating torque exceeds 1.5 times the rated value, avoiding damage to the pump's mechanical structure due to excessive force

III. Technical Advantages and Innovative Design

1. Efficient Emergency Response Design

Quick Start Structure: Adopts lightweight crank + high-strength connecting rod design with small starting resistance. A single person can complete start-up preparation within 10 seconds, and the start-up efficiency is 50% higher than that of traditional Hand pumps

Quick-connect Interface Configuration: Standard DN25/DN40 standardized quick-connect joints at inlet and outlet, which can be quickly connected to the ship's emergency fuel pipeline. The connection time is ≤2 minutes, greatly shortening the emergency response time

Two-way Conveying Function: Some models support two-way crank rotation, realizing two-way switching of "oil suction - oil discharge". Two-way transfer between fuel tanks can be completed without replacing pipelines, improving operation flexibility

2. Enhanced Weather Resistance and Wear Resistance

Wear Resistance Upgrade of Core Components: Pistons/rotors are made of alloy steel, and the surface is subjected to high-frequency quenching treatment with hardness ≥HRC55. The wear resistance is improved by 40%, and the continuous Hand service life is ≥500 hours

Full-process Anti-corrosion Treatment: Metal components adopt double anti-rust treatment of galvanizing + passivation, which can withstand continuous exposure to salt spray environment for 1000 hours without rust, adapting to the high-salt-spray marine environment of ships

Low-temperature Adaptation Optimization: Low-temperature models can be optionally equipped with thermal insulation sleeves, which can quickly preheat the pump body in -30℃ environment, avoiding fuel solidification and blockage, and ensuring smooth emergency start-up in low-temperature sea areas

3. Easy Operation and Maintenance

Ergonomic Design: The crank is equipped with a 35mm diameter non-slip rubber grip that fits the palm curve, reducing long-term operation fatigue; the crank length is adjustable (300-400mm), adapting to operators of different heights

Tool-free Maintenance: Components such as the pump cover and valve group are connected by quick-release buckles. Daily inspection and replacement of wearing parts such as seals do not require special tools, and can be independently completed by crew members with maintenance time ≤10 minutes

Generalization of Wearing Parts: The generalization rate of wearing parts such as seals, one-way valves, and bearings for different flow models is ≥90%, reducing the inventory pressure of ship emergency spare parts and lowering operation and maintenance costs

4. Wide Scene Adaptability

Quick Switching of Multiple Media: By replacing seals and valve seats of different materials, it can quickly adapt to different fuel media such as diesel oil, heavy fuel oil, and lubricating oil, realizing "one pump for multiple uses" and improving the versatility of emergency guarantee

Dual Installation Modes: Small models are equipped with portable handles, which can be flexibly moved to the fault site; conventional models support bolt-fixed installation, adapting to fixed emergency points in the engine room to meet different deployment needs

Lightweight Equipment Adaptation: Special models for lifeboats adopt ultra-lightweight design (weight ≤3kg) with compact size (300×200×150mm), which can be directly stored in the lifeboat storage cabin, adapting to emergency fuel supply for marine escape

IV. Typical Application Scenarios

1. Emergency Start-up Fuel Supply for Main Engines

Emergency Start-up of Cargo Ship Main Engine: When the main fuel system of a 10,000kW cargo ship fails, a 316L stainless steel Hand fuel pump (flow rate 3-5m³/h, pressure 1.0MPa) is used to connect to the emergency fuel tank through a quick-connect joint. A single person can transport 15-25L of fuel by hand cranking for 5 minutes, meeting the emergency start-up demand of the main engine and quickly restoring the ship's power

Power Emergency of Engineering Ships: When an offshore engineering ship encounters power outage during operation, a cast iron Hand fuel pump (flow rate 2-3m³/h, pressure 0.8MPa) is used to transport diesel oil to the standby generator, which can stably supply fuel without power supply, ensuring operation continuity

2. Fuel Transfer and Supply Between Tanks

Balanced Transfer of Fuel Tanks: When the oil level of fuel tanks needs to be adjusted during the navigation of an oil tanker, a two-way Hand fuel pump (flow rate 5-8m³/h, pressure 1.2MPa) is used, which can realize stable transfer between different fuel tanks without starting large electric pumps, reducing energy consumption

Fuel Supply for Small Ships: When coastal fishing boats berth for supply, an aluminum alloy portable Hand fuel pump (flow rate 1-2m³/h, pressure 0.6MPa) is used to manually transport shore-based fuel to the fishing boat's fuel tank. It is simple to operate and does not require external power supply, adapting to the scenario without power supply at the dock

3. Fuel Guarantee for Life-saving Equipment

Fuel Supply for Lifeboats: When a ship is abandoned, a special micro Hand fuel pump for lifeboats (flow rate 0.5-1m³/h, pressure 0.4MPa) can transport diesel oil from the emergency fuel barrel to the lifeboat engine. It is small in size and light in weight, easy to carry and operate during escape

Emergency Fuel Supply for Life Rafts: Ultra-small Hand fuel pumps (weight ≤2kg) are equipped on life rafts of ocean-going ships to transport fuel to the emergency power unit of the life raft, ensuring the basic power demand during marine drift

4. Auxiliary Fuel Transportation Scenarios

Fuel Filtration and Circulation: During the maintenance of the ship's fuel system, a Hand fuel pump (flow rate 2-3m³/h, pressure 0.8MPa) is used to transport fuel from the fuel tank to the filtration device. After impurity filtration, it flows back to the tank, without starting the main fuel pump, reducing maintenance energy consumption

Fuel Supply for Remote Parts: When refueling the fuel pipelines of remote parts such as ship anchors and winches, a portable Hand fuel pump can be flexibly moved to the operation point to accurately refuel the equipment's fuel tank, solving the problem of long-distance pipeline transportation