Copper Screw Fuel Oil Pump

I. Product Positioning and Core Functions

Copper screw fuel oil pumps are precision positive displacement pumps designed for fuel transportation systems. Using copper alloy screws and bushings, they achieve efficient and stable transmission of gasoline, diesel, heavy oil, and other fuels through the screw meshing principle. Their core functions include:

Explosion-Proof and Safety: Copper alloy screws generate no sparks during meshing. Combined with explosion-proof motors (such as ATEX certification), they safely transport flammable and explosive media like gasoline (flash point ≤-43℃) and sulfur-containing heavy oil.

High-Viscosity Adaptability: Tri-screw design (contact ratio ≥1.5) transports fuels with viscosity 3-1500cSt. Heating jackets (suitable for oil temperature ≤150℃) handle high-viscosity heavy oil (e.g., preheating required for viscosity >500cSt).

Self-Priming and Stable Transmission: Self-priming height ≤5m, no priming needed at startup; volumetric efficiency ≥92%, pressure pulsation ≤±2%, suitable for continuous marine operations and large-flow oil transportation in depots.

Intelligent Control Compatibility: Supports variable frequency speed regulation (accuracy ±1%) and pressure monitoring (accuracy 0.5 class), automatically adjusting flow with 15%-25% energy savings.

II. Key Materials and Performance Parameters

III. Technical Advantages and Innovative Design

Low Noise and Long Life

Tri-screw synchronous rotation design (speed ≤3000rpm) and precision dynamic balance (residual unbalance ≤5g・mm), vibration ≤2.0mm/s, noise ≤75dB, bearing life extended to 10,000 hours.

Smooth copper alloy surface (Ra≤3.2μm), scaling rate 60% lower than cast iron, maintenance cycle extended to 12 months.

Intelligent Control and Energy Saving

Standard pressure sensor (0.5-class accuracy) and temperature monitoring module, auto-alarm and standby pump switch for unattended operation.

Variable frequency control adjusts flow based on load, maintaining ≥70% efficiency under variable conditions, 15%-25% annual energy savings.

Explosion-Proof and Safety Design

Copper alloy screws and bushings generate no sparks. With explosion-proof motors (e.g., ATEX), suitable for flammable media like gasoline and aviation kerosene.

Built-in safety valve (1.5× rated pressure for full reflux) prevents overpressure damage from blockages or misoperations.

IV. Typical Application Scenarios

Marine and Offshore Engineering

Main Engine Fuel Supply: Tin bronze screw pumps transport heavy oil to marine diesel engines, resisting ship tilt (≤15°), suitable for high-temperature fuel (oil temp ≤120℃).

Cargo Tank Cleaning: 2CY series copper screw pumps enable rapid oil unloading, self-priming without priming, suitable for -20℃~70℃ environments.

Oil Depots and Ports

Large-Flow Oil Transportation: KCB series pumps transport gasoline/diesel, flow 1.1-600m³/h, pressure 0.28-2.5MPa, suitable for depot loading and ship unloading

Heavy Oil Transportation: 3GR series tri-screw pumps transport heavy oil (viscosity ≤1500cSt), heating jackets maintain oil temp 80-150℃ for refinery pipelines.

Industrial and Power Equipment

Generator Sets: ZYB series booster pumps provide 0.5-2.5MPa pressure oil, flow 20-200L/min, 适配 diesel generator fuel injection systems.

Construction Machinery: Aluminum bronze pumps with vibration resistance (amplitude ≤0.04mm) transport hydraulic oil, pressure 0.5-1.0MPa.

Special Fuel Applications

Aviation Fuel: Precision copper screw pumps (sanitary design) transport aviation kerosene, flow 0.1-10L/min, pressure 0.2-0.6MPa, resistant to CIP/SIP cleaning (135℃, 30min).

Hydrogen Energy Equipment: Tin bronze pumps transport ethylene glycol coolant (freezing point -30℃), pressure 0.5-1.0MPa, suitable for alkaline electrolysis (pH 10-12).

V. Selection and Maintenance Key Points

Key Selection Parameters

Media Characteristics: Choose tin bronze for particulate media, aluminum bronze for high-pressure/corrosive media, brass for conventional scenarios.

Working Conditions: Heating jackets for >80℃, aluminum bronze + explosion-proof motors for explosion-proof areas, electric tracing for < -20℃.

System Compatibility: Select models by flow (5-600m³/h), pressure (0.28-2.5MPa), and viscosity (3-1500cSt); KCB for large flow, ZYB for high pressure.

Maintenance Specifications

Daily Monitoring: Record inlet/outlet pressure, bearing temperature (rise ≤35℃), check vibration (threshold ≤2.5mm/s) weekly.

Regular Maintenance: Clean Y-type filters (≤5mm accuracy) quarterly, remove oil sludge annually with special cleaners, replace mechanical seals when leakage >10 drops/min.

Compliance Requirements

Industrial pumps comply with GB/T 13007; explosion-proof scenarios need ATEX/UL; marine pumps require DNV GL/CCS certification.

Food-grade applications need FDA; pharmaceutical-grade need ISO 10993 biocompatibility testing.