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Marine Cast Iron Bilge Pump

Date:2026-01-14Views:

Marine Cast Iron Bilge Pump

I. Product Overview

The marine cast iron bilge pump is a core key equipment of the drainage system for small and medium-sized ships. It is specially designed for the discharge and transfer of impurity-containing and weakly corrosive media such as ship bilge water, domestic sewage and ballast water. Its core working principle is that the motor drives the impeller to rotate at high speed, generating negative pressure by virtue of centrifugal force to realize the smooth suction, pressure boosting and continuous transportation of various types of sewage.

The product has obtained certifications from mainstream classification societies such as CCS, ABS and BV, and is widely used in 500-50000 ton-class small and medium-sized ocean-going cargo ships, inland river cargo ships, fishing boats, passenger ships and small offshore engineering platforms. It is an essential core equipment for regular and emergency drainage of small and medium-sized ships.

II. Core Parameters

Parameter Category

Specific Specification/Range

Adaptation Description

Flow Range

10-150 m³/h, supporting graded customization

Meets the bilge water discharge and transfer flow requirements of small and medium-sized ships with different cabin capacities

Head Range

10-50 m

Suitable for single/multi-layer cabin and medium-short distance drainage pipeline transportation of small and medium-sized ships

Pressure Range

Rated 0.3-1.2 MPa, Maximum 1.5 MPa

Ensures stable discharge of impurity-containing and weakly corrosive sewage, meeting the drainage pressure requirements of small and medium-sized ships

Material Specification

Pump body/Impeller: Cast iron; Transmission shaft: Stainless steel; Seal: Oil-resistant and corrosion-resistant rubber

Corrosion and salt spray resistant, impact resistant, high mechanical strength, excellent cost-effectiveness, suitable for working conditions of small and medium-sized ships

Applicable Medium

Bilge water, domestic sewage, ballast water; Impurity particle size ≤4mm, content ≤4%; Temperature -10℃~60℃, viscosity 5-600 mm²/s

Suitable for mainstream sewage types of small and medium-sized ships, resistant to scouring by a small amount of impurities and weak corrosion

Operating Performance

Volumetric efficiency ≥85%, Noise ≤80 dB(A), Continuous operation life ≥7000 hours

Supports 24-hour uninterrupted drainage, adapting to regular and emergency drainage working conditions of small and medium-sized ships

III. Core Advantages

Cost-Effective Choice: The cost of high-quality cast iron material is controllable. Compared with pumps made of copper and stainless steel, the procurement and operation and maintenance costs are reduced by more than 30%, while meeting the core drainage needs of small and medium-sized ships, with significant cost-effectiveness advantages.

Wide Adaptability with Corrosion and Impact Resistance: The cast iron undergoes aging treatment, featuring high mechanical strength and resistance to bumpy impact during ship navigation. Its surface is treated with anti-corrosion coating, which can effectively resist the erosion of high salt spray and high humidity marine environment, and is not easy to rust and scale.

Efficient Anti-Clogging Drainage: Adopts open impeller design with wide and smooth flow channels, which can effectively avoid winding and clogging of impurities such as fibers and sediment, ensure continuous and stable transportation of impurity-containing sewage, and adapt to complex bilge sewage working conditions.

IV. Typical Application Scenarios

Regular Discharge of Bilge Water for Small and Medium-Sized Ships: Continuously discharges seawater, rainwater, and equipment leakage oil sewage that infiltrate into the bilge during the navigation of small and medium-sized cargo ships and inland river ships, keeps the bilge dry, and ensures the stability and navigation safety of the ship.

Ship Emergency Drainage Support: When small and medium-sized ships encounter accidents such as stranding and collision leading to a small amount of water entering the bilge, it can be quickly started to achieve emergency drainage, prevent the increase of accumulated water from affecting ship safety, and gain time for accident disposal.

Ship Domestic Sewage Transfer: Transports crew domestic sewage from the sewage collection tank to the simple sewage treatment device, avoids direct discharge of domestic sewage to pollute the marine environment, and meets the basic requirements of environmental protection discharge for small and medium-sized ships.



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