Marine Cast Iron Fire Pump

I. Product Overview

Marine cast iron fire pumps are core equipment of ship fire safety systems, using high-strength cast iron (HT250/300) or ductile iron (QT400-18) as the main materials, realizing efficient high-pressure firewater delivery and jetting through the centrifugal pump principle. The working principle is that the motor drives the impeller to rotate at high speed, enabling firewater to gain kinetic energy and convert it into pressure energy through the volute, performing fire-fighting operations via fire monitors or sprinkler systems. The pump body adopts an integral casting process, and flow-through components are reinforced with epoxy resin coatings, with a corrosion-resistant service life ≥15 years in fresh water and low-salinity seawater. It is suitable for various merchant ships, engineering vessels, and port facilities, meeting IMO International Code for Fire Safety Systems (FSS Code) and classification society certifications (LR, ABS, etc.).

II. Core Technologies and Material Characteristics

1.Cast Iron Material Selection and Performance

2.Key Technical Parameters

Flow range: 50-500m³/h, suitable for 1,000-50,000-ton vessels

Head: 60-150m, meeting the international standard for fire monitor range ≥80m

Efficiency index: Pump efficiency ≥80%, motor efficiency ≥IE3 energy efficiency standard

Corrosion resistance design: Epoxy resin coating thickness ≥200μm, 1,000-hour salt spray test passed without rust

Temperature adaptability: Stable operation at -20℃~80℃

III. Technical Advantages and Innovative Design

1. High-pressure Stable Water Supply

Double volute design: Symmetric double volute structure balances radial force, with vibration value ≤2.8mm/s, ensuring 5,000 hours of continuous failure-free operation.

Multistage impeller technology: Achieves ultra-high head (150m) through 2-4 stages of impellers in series, meeting the deck fire protection needs of large oil tankers.

2. Intelligent Control System

Frequency conversion speed regulation technology: Automatically adjusts flow according to fire protection needs, with energy saving rate up to 25%, reducing ship power load.

Remote monitoring function: Supports RS485/Modbus communication protocols, integrable with the ship's central control system for remote start/stop and status monitoring.

3. Long Life and Easy Maintenance

Wear-resistant mechanical seal: Silicon carbide-carbon graphite double-end face mechanical seal, leakage ≤5mL/h, service life exceeding 8,000 hours.

Modular structure: Split design of bearing housing and pump body, reducing maintenance time by 60%, with maintenance costs 25% lower than copper alloy pumps.

IV. Typical Application Scenarios

1. Ship Fire Protection Systems

Passenger ship safety assurance: Provides high-pressure fresh water for cruise ships, flow 100-300m³/h, covering the ship's fire protection areas with automatic sprinkler systems.

Oil tanker fire prevention and control: Configures dual-pump parallel systems for 200,000-ton oil tankers, total flow ≥500m³/h, meeting the needs of large-area deck fire fighting.

2. Port and Wharf Fire Protection

Wharf fixed fire protection facilities: Provides explosion-proof fire pumps for LNG terminals, head ≥120m, addressing hazardous chemical leakage fires.

Port tugboat fire protection: Cast iron fire pumps equipped on tugboats can support cross-vessel fire fighting, quickly establishing temporary fire protection lines.

3. Engineering Vessels and Offshore Platforms

Drilling platform fire protection: Provides high-pressure seawater fire protection for offshore drilling platforms, adapting to -20℃ low-temperature environments to ensure all-weather operation safety.

Engineering vessel emergency systems: Fire pumps equipped on engineering vessels such as dredgers and crane ships meet SOLAS convention emergency drainage requirements.

V. Selection and Maintenance Specifications

1. Key Selection Parameters

Ship type: Low-noise type for passenger ships, explosion-proof type for oil tankers, sediment-resistant type for engineering vessels

Fire protection requirements: According to IMO requirements, ≥25m³/h flow per 1,000 gross tons is required; recommended selection with 1.5x safety factor

Environmental conditions: Ductile iron + special reinforced coating for high-salinity seas, electric tracing systems for cold regions

2. Maintenance Key Points

Daily monitoring: Inspect bearing temperature (≤75℃) and vibration value (≤4.5mm/s) every 200 hours

Regular maintenance: Replace lubricating oil (ISO VG32) quarterly, inspect impeller wear (allowable loss ≤2mm) annually

In-depth maintenance: Perform coating inspection and repair every 5 years, replace aging seals and bearings

VI. Compliance and Certification

International standards: Complies with IMO FSS Code Chapter 5 and MSC.451(99) resolution

Classification society certifications: Passed LR Rules for the Classification of Ships and ABS Guide for Fire Protection Systems for Ships

Explosion-proof certification: ATEX Zone 1/2 certification (optional), meeting the use requirements in hazardous areas