Inner Core: Temperature Range -10°C to 80°C, Diameter 50-300 mm

Component Specifications

Definition

The inner core is a cylindrical structural component within a marine ballast water treatment system filter cartridge, designed to provide mechanical support to the filter media, maintain cartridge shape under pressure, and facilitate proper fluid flow distribution. It ensures uniform filtration by preventing media collapse and channeling, critical for removing organisms and particulates from ballast water to meet IMO D-2 standards.

Working Principle

The inner core operates by providing a rigid framework that supports the filter media (e.g., pleated fabric or mesh), allowing water to flow from the outside to the inside of the cartridge. It maintains structural integrity under differential pressure, prevents media deformation, and ensures consistent filtration efficiency by distributing flow evenly across the media surface.

Materials

Stainless steel 316L (ASTM A240), polypropylene (PP), or high-density polyethylene (HDPE), selected for corrosion resistance, mechanical strength, and compatibility with seawater. Surface finish: smooth, non-porous to prevent biofouling.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	250-1000 mm
Diameter	50-300 mm
Porosity	Open area >40% for flow optimization
Wall Thickness	1.5-5 mm
Pressure Rating	Up to 10 bar
Temperature Range	-10°C to 80°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 16890, DIN 24550

Parent Products

This component is used in the following industrial products

Marine Ballast Water Treatment System Filter Cartridge

This cylindrical filtration cartridge is a replaceable component designed for marine ballast water treatment systems.

View Product Details

Engineering Analysis

Risks & Mitigation

Corrosion in seawater environments
Biofouling accumulation
Structural failure under high pressure
Improper fit causing bypass leakage

FMEA Triads

Trigger: Material degradation due to chloride-induced corrosion
Failure: Loss of structural integrity, leading to media collapse and reduced filtration efficiency
Mitigation: Use corrosion-resistant alloys (e.g., 316L stainless steel), apply protective coatings, and implement regular inspection schedules

Trigger: Inadequate design for pressure differentials
Failure: Core deformation or rupture, causing system shutdown and potential environmental non-compliance
Mitigation: Engineer cores with safety factors exceeding operational pressures, conduct pressure testing per ISO standards

Industrial Ecosystem

Compatible With

Alfa Laval PureBallast, Optimarin Ballast System, Wärtsilä Aquarius UV

Typical Suppliers & Equivalents

Parker Hannifin, 3M, Eaton filtration cartridges

Compliance & Inspection

Tolerance

Diameter tolerance ±0.5 mm, length tolerance ±1 mm per ISO 2768-m

Test Method

Pressure decay test per ISO 2941, material corrosion test per ASTM G48

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

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Manufacturers of Inner Core

Manufacturer profiles associated with Inner Core.

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Frequently Asked Questions

What is the primary function of the inner core in a ballast water filter cartridge?

The inner core provides structural support to prevent filter media collapse, ensures even flow distribution, and maintains cartridge integrity under operational pressures.

How does material selection impact inner core performance?

Materials like stainless steel 316L offer high corrosion resistance in seawater, while polymers like PP reduce weight and cost; choice affects durability, compatibility, and maintenance needs.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Inner Core