Copper Centrifugal Emergency Fire Pump

I. Product Overview

Copper centrifugal emergency fire pumps are designed based on the centrifugal force transportation principle, using copper and copper alloys (brass, tin bronze, aluminum bronze, etc.) as the core material, specially built for emergency water supply needs in emergency situations such as fires. The copper impeller and pump body, combined with emergency condition enhancement design, integrate rapid self-priming capability, backup power adaptability, and harsh environment tolerance, enabling stable operation during main power failure, extreme weather, or corrosive environments. They meet the strict requirements of GB 50974 Technical Code for Fire Water Supply and Hydrant Systems, IMO SOLAS convention, and international fire certifications (UL/FM) for emergency fire equipment.

II. Core Materials and Performance Adaptation

1.Tin Bronze (ZCuSn10Pb1) — Preferred for Emergency Corrosion Resistance

Characteristics

Contains 10% tin and 1% lead, tensile strength ≥350MPa, hardness HB≥80, corrosion rate <0.03mm/year in seawater (Cl⁻ concentration 20000ppm), outstanding cavitation resistance (can withstand 200MPa bubble collapse impact), suitable for long-term immersion or humid environments.

Thermal conductivity 150W/(m・K), 4 times that of cast iron, effectively reducing pump body temperature rise (≤80℃) during emergency operation and extending seal life.

Emergency Advantages

Impellers are integrally cast, with blades thickened by 15% (compared to conventional fire pumps), resisting impurity scouring (such as pipeline rust and sediment) under emergency conditions to ensure 3000 hours of continuous trouble-free operation.

2.Aluminum Bronze (ZCuAl10Fe3) — Benchmark for Explosion-Proof and Impact Resistance

Characteristics

Contains 10% aluminum and 3% iron, tensile strength ≥600MPa, impact toughness ≥35J/cm², can withstand water hammer pressure (1.5 times working pressure) and ship  vibration (amplitude ≤0.1mm), no sparks during friction (ignition energy ≥50mJ), complying with Ex nA IIC T4 explosion-proof grade.

In media containing foam extinguishing agents (pH8-10), corrosion resistance is 2 times higher than brass, with strong self-healing ability of the surface oxide film.

Emergency Advantages

Pump shafts are forged from aluminum bronze, combined with double-row self-aligning bearings, axial runout ≤0.05mm during emergency start-up, ensuring rapid response (self-priming time ≤45 seconds).

3.Brass (H68) — Lightweight Emergency Adaptation

Characteristics

Contains 68% copper and 32% zinc, density 8.5g/cm³ (4% lower than tin bronze), easy to process into complex flow channels, cost 30% lower than bronze, suitable for small and medium emergency fire pumps (flow ≤100m³/h).

Resistant to fresh water corrosion (pH6-8), salt spray resistance increased by 50% after surface nickel plating (complying with GB/T 10125-2021 salt spray test standard).

Emergency Advantages

The pump body adopts a split design, 20% lighter than cast iron pumps, easy for mobile installation (such as vehicle-mounted emergency fire devices), adapting to rapid deployment needs.

III. Technical Advantages and Emergency Characteristics

1.Core Emergency Technical Advantages

Rapid Response and Backup Power Adaptation

Dual-Power Configuration: Standard motor (AC 380V) + diesel engine drive (DC 24V battery start), automatic switching during main power failure (switching time ≤10 seconds), complying with GB 51309-2018 Technical Standard for Fire Emergency Lighting and Evacuation Indication Systems.

Enhanced Self-Priming Design: Built-in vacuum priming pump (positive displacement vacuum pump), first water absorption height ≥7m, water absorption time ≤60 seconds, no manual priming required, suitable for open-air or high-position water tank water shortage scenarios.

Extreme Condition Reliability

Voltage Fluctuation Resistance: The motor is equipped with an energy storage capacitor (capacity ≥10000μF), which can continue to operate for 30 seconds during sudden grid voltage drop (≤40% rated voltage) to avoid emergency start-up failure.

Low-Temperature Start-up Adaptation: Copper components maintain ≥90% of mechanical properties in -40℃ environment, combined with electric heating tape (power 500W), can start within 3 minutes in -20℃ low temperature.

Low Maintenance and Long Life

Smooth copper surface (roughness Ra≤6.3μm), scaling rate 70% lower than cast iron, no frequent cleaning required during emergency standby (annual operation <50 hours); mechanical seals use silicon carbide/fluororubber combination, leakage ≤5 drops/minute, life exceeding 8000 hours.

2.Application Limitations

Strong Corrosive Medium Restrictions: Prohibited from transporting fire extinguishing agents containing ammonia (NH₃) or hydrofluoric acid (HF). Brass pumps in acidic water with pH<5 require polytetrafluoroethylene (PTFE) linings (cost +25%).

Large-Flow Scenario Energy Consumption: Tin bronze pumps have 8%-10% higher energy consumption than stainless steel pumps at flow ≥300m³/h, requiring high-efficiency motors (IE3 or above) to reduce emergency condition energy consumption.

Impurity Sensitivity and Protection: Impeller clearance 0.8mm, sensitive to solid particles >3mm, mandatory double-barrel filter configuration (switching time ≤15 seconds) to avoid emergency blockage.

IV. Typical Emergency Application Scenarios

1. Marine Emergency Fire Protection Systems

Application Scenario: Emergency fire pump cabins of cargo ships/cruise ships, automatically starting when the main fire pump fails, transporting seawater to deck fire cannons (flow ≥40m³/h, head ≥100m), meeting IMO SOLAS convention Chapter Ⅱ-2 requirements for passenger ship emergency pumps (capable of projecting 2 water jets to 12m height within 30 minutes).

Material Selection: Tin bronze impeller + aluminum bronze pump shaft, resisting long-term seawater immersion, supporting diesel engine drive (≥3 hours), adapting to ship sway (15° transverse tilt, 10° longitudinal tilt) conditions.

2. Chemical Park Emergency Rescue

Application Scenario: Emergency fire in storage tank areas, transporting sodium bicarbonate-containing foam mixture (pH9-10), aluminum bronze pumps resistant to alkaline corrosion, combined with explosion-proof control cabinets (Ex d IIB T4), safely operating in explosive gas environments (such as hydrogen concentration ≤4%), flow 200-500m³/h, head 150-200m.

Technical Configuration: Self-priming design + pressure sensor (accuracy 0.1 class), automatically matching fire cannon/sprinkler system needs, response time ≤30 seconds.

3. High-Rise Building Standby Fire Protection

Application Scenario: Emergency fire pumps for refuge floors in super high-rise buildings (>200m), tin bronze pumps providing high head (≥200m) water supply, impellers using ternary flow design (efficiency ≥82%), combined with variable frequency control, maintaining fire hydrant pressure ≥0.35MPa when the main pump fails, complying with GB 50016-2021 Code for Fire Protection Design of Buildings.

Backup Power: Diesel engine drive (power ≥1.5 times motor power), configured with independent fuel tank (capacity ≥8 hours fuel consumption), adapting to long-term emergency water supply.

4. Field and Mobile Emergency Scenarios

Application Scenario: Forest fire fighting, temporary construction site fire protection, brass pump lightweight design (weight ≤50kg), adapting to vehicle-mounted/trailer mobile fire devices, transporting fresh water/forest fire extinguishing foam (viscosity ≤50cSt), flow 50-150m³/h, self-priming height ≥6m, suitable for areas without fixed water sources.

V. Usage and Maintenance Specifications (Emergency Dedicated)

1. Key Elements for Emergency Selection

Power Configuration:

Prioritize "motor + diesel engine" dual power (essential for Class A emergency pumps), diesel engine starting battery capacity must meet cold start (-10℃) for more than 10 times.

Environmental Adaptation:

Coastal/salt spray environments: Pump body sprayed with epoxy copper powder paint (thickness ≥150μm), impellers with nickel-phosphorus alloy plating (thickness 20-30μm);

Cold regions: Equipped with heating cables (power density ≤2W/cm²) to prevent pump cavity icing (minimum temperature resistance -40℃).

2. Core Points of Emergency Maintenance

Regular Testing:

No-Load Test Run: Operate for 15 minutes monthly (25% load when diesel engine driven), record start-up time (target ≤15 seconds), vibration value (≤2.5mm/s);

Load Test: Simulate fire conditions quarterly (fully open outlet valve), test whether flow/head meets standards (allowable deviation ≤-5%), while verifying dual-power switching logic.

Component Maintenance:

Diesel engine driven pumps: Replace engine oil (SAE 15W-40) every 50 hours, inspect copper oil pipe interfaces for cracks (focus on vibration parts);

Mechanical seals: After emergency operation, inspect friction pair wear (allowable radial wear ≤0.1mm), replace seal O-rings every six months in seawater media (material upgraded to perfluororubber).

3. Compliance and Certification Requirements

Domestic Standards: Must pass CCCF certification, obtain the Fire Product Type Approval Certificate, parameters such as emergency start-up time and continuous operation time must comply with GB 6245-2019 Fire Pumps Appendix C requirements.

International Certifications: Marine export pumps must pass CCS/ABS classification society certification (complying with SOLAS Ch. II-2 Reg. 10), industrial emergency pumps must meet FM 2000 standards (seismic grade Zone 4, can withstand 0.3g acceleration).