Ion Exchange Vessel

Product Specifications

Technical details and manufacturing context for Ion Exchange Vessel

Definition

An ion exchange vessel is a cylindrical pressure vessel that houses ion exchange resin media as part of a water treatment module. It facilitates the removal of specific dissolved ionic contaminants (cations or anions) from water through reversible ion exchange reactions between the resin and the solution, enabling water softening, demineralization, or specific ion removal. The vessel is designed to withstand operating pressures and temperatures typical of industrial water treatment systems, with design pressure ranging from 0.6 to 1.6 MPa and design temperature from 5 to 60°C, as per GB/T 150. Flow rates can vary from 1 to 30 m³/h, depending on vessel diameter and resin type. Standard vessel diameters range from 300 to 3000 mm, with heights from 1200 to 6000 mm including dished ends. Resin volume, which determines exchange capacity, ranges from 0.1 to 20 m³. Wall thickness is based on pressure and diameter, typically 4 to 20 mm, per GB/T 150. Material grades include Q235B, 304, and 316L, referencing GB/T 3274 and ASTM A240. Inlet/outlet sizes are flanged connections from DN25 to DN200 per GB/T 9119. Empty weight varies from 200 to 5000 kg. Internal surface finish can be specified as Ra ≤ 3.2 μm for sanitary applications. Leak test pressure is 1.1 to 1.25 times design pressure per GB/T 150. Materials on file include fiberglass reinforced plastic (FRP), stainless steel (304, 316L), and lined carbon steel. The vessel requires periodic regeneration of the resin with brine or acid/caustic solution when exchange capacity is exhausted. Verify all model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Water flows through a bed of ion exchange resin beads inside the vessel. Target ions in the water (e.g., calcium, magnesium, nitrate) are exchanged for less problematic ions (e.g., sodium, hydrogen, hydroxide) held on the resin's functional groups. The process continues until the resin's exchange capacity is exhausted, after which it requires regeneration with a concentrated brine or acid/caustic solution.

Common Materials

Fiberglass Reinforced Plastic (FRP), Stainless Steel (e.g., 304, 316L), Carbon Steel (lined)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Design Pressure	0.6–1.6 MPa	Higher pressure requires thicker shellGB/T 150
Design Temperature	5–60 °C	Resin degradation above 60°C
Flow Rate	1–30 m³/h	Depends on vessel diameter and resin type
Vessel Diameter	300–3000 mm	Standard sizes available
Vessel Height	1200–6000 mm	Includes dished ends
Resin Volume	0.1–20 m³	Determines exchange capacity
Wall Thickness	4–20 mm	Based on pressure and diameterGB/T 150
Material Grade	Q235B/304/316L	Carbon steel or stainless steelGB/T 3274, ASTM A240
Inlet/Outlet Size	DN25–DN200	Flanged connectionsGB/T 9119
Weight	200–5000 kg	Empty weight, varies with size
Surface Finish	Ra ≤ 3.2 μm	Internal finish for sanitary applications
Leak Test Pressure	1.1–1.25 × design MPa	Hydrostatic test per codeGB/T 150

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

Components / BOM

Vessel Shell Part
Provides the pressure-retaining structure for the resin bed and process fluid.

Material: FRP, Stainless Steel, or Lined Carbon Steel
Upper Distributor/Collector
Distributes incoming water evenly across the resin bed surface during service and collects backwash water.

Material: PVC, ABS, Stainless Steel
Lower Distributor/Collector
Collects treated water evenly from the bottom of the resin bed during service and distributes regeneration/rinse solutions.

Material: PVC, ABS, Stainless Steel
Resin Retention Screen Part
Prevents ion exchange resin beads from escaping the vessel with the effluent.

Material: Stainless Steel, Plastic
Manway
Provides access for resin loading, inspection, and maintenance.

Material: Matching vessel material
Ion Exchange Resin
The bead bed that actually does the exchange; the vessel is only its container.

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 150 psi (10.3 bar) operating, 225 psi (15.5 bar) design
flow rate:	2-20 gpm/ft³ (0.27-2.7 m³/h/m³) resin bed
temperature:	5°C to 50°C (41°F to 122°F)
slurry concentration:	Not applicable (fixed bed operation)

Media Compatibility

✓ Demineralized water production ✓ Boiler feedwater treatment ✓ Process water purification

Unsuitable: High organic content wastewater (fouling risk)

Sizing Data Required

Required flow rate (gpm or m³/h)
Total dissolved solids (TDS) concentration (ppm)
Required treated water quality (conductivity/resistivity)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Resin degradation

Cause: Chemical attack from incompatible process fluids, high temperatures exceeding resin thermal limits, or chlorine/oxidant exposure breaking polymer chains

Vessel wall corrosion/erosion

Cause: Galvanic corrosion at dissimilar metal interfaces, pitting from chloride ions in brackish water, or erosion from high-velocity resin movement during backwash cycles

Maintenance Indicators

Visible resin leakage at vessel connections or through cracked laterals
Abnormal pressure drop across vessel (>15-20% increase from clean state) indicating fouling or channeling

Engineering Tips

Implement regular resin analysis (annual) to monitor bead integrity, exchange capacity, and fouling levels - replace at 80% capacity loss
Install sacrificial anode protection on vessel internals and maintain proper backwash flow rates (typically 4-6 gpm/ft²) to prevent resin compaction and mechanical damage

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ASME BPVC Section VIII - Pressure vessel construction DIN 28018 - Vessels for process plants

Quoted from the published standard.

Manufacturing Precision

Bore diameter: +/-0.05mm
Surface finish: Ra 0.8μm maximum

Quality Inspection

Hydrostatic pressure test
Visual and dimensional inspection

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

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Manufacturing capability

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Inspection readiness

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

Supplier transparency

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Manufacturers of Ion Exchange Vessel

Manufacturer profiles associated with Ion Exchange Vessel.

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Frequently Asked Questions

What materials are available for ion exchange vessels?

Materials on file include fiberglass reinforced plastic (FRP), stainless steel (grades 304 and 316L), and lined carbon steel. The choice depends on the application, pressure, and corrosion requirements.

What is the typical design pressure range?

The design pressure range is 0.6 to 1.6 MPa, as per GB/T 150. Higher pressures require thicker vessel walls.

How is the resin regenerated?

When the resin's exchange capacity is exhausted, it is regenerated with a concentrated brine solution (for softening) or acid/caustic solution (for demineralization), reversing the ion exchange process.

What standards apply to the vessel design?

The vessel design references GB/T 150 for pressure vessels, and material grades may reference GB/T 3274 and ASTM A240. Flanged connections follow GB/T 9119. Always verify compliance with the manufacturer.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Water Treatment Module

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 12 October 2026

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