Structured Manufacturing Data (2026)

Reverse Osmosis Membrane

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Reverse Osmosis Membrane used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Reverse Osmosis Membrane is characterized by the integration of Membrane Surface and Support Layer. In industrial production environments, manufacturers listed on CNFX commonly emphasize Polyamide thin-film composite construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A semi-permeable membrane used in reverse osmosis systems to remove dissolved solids, ions, and contaminants from water by applying pressure to overcome osmotic pressure.

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Product Specifications

Technical details and manufacturing context for Reverse Osmosis Membrane

Definition
The Reverse Osmosis Membrane is a critical component within the Water Treatment Module that serves as the primary filtration barrier. It operates by allowing water molecules to pass through while rejecting dissolved salts, organic molecules, bacteria, and other impurities. Within the module, it's typically housed in pressure vessels and works in conjunction with pre-filters, pumps, and post-treatment systems to produce purified water.
Working Principle
Reverse osmosis works by applying pressure to overcome the natural osmotic pressure. When pressure greater than the osmotic pressure is applied to the concentrated solution side of the membrane, water molecules are forced through the semi-permeable membrane from the concentrated solution to the dilute solution, leaving contaminants behind. The membrane's pore size (typically 0.0001 microns) allows only water molecules to pass through while rejecting most dissolved solids, ions, and larger molecules.
Common Materials
Polyamide thin-film composite, Polysulfone support layer, Polyester non-woven fabric backing
Technical Parameters
  • Standard membrane element diameter (typically 2.5", 4", or 8") (inches) Per Request
Components / BOM
  • Membrane Surface Part
    Active filtration layer that selectively allows water molecules to pass through while rejecting contaminants
    Material: Polyamide thin-film composite
  • Support Layer Part
    Provides structural support to the thin active layer and allows water passage
    Material: Polysulfone
  • Backing Material Part
    Provides mechanical strength and prevents membrane damage during handling and operation
    Material: Polyester non-woven fabric
  • Permeate Carrier Part
    Channels for collecting purified water that passes through the membrane
    Material: Polypropylene
  • Feed Spacer Part
    Creates turbulence and maintains separation between membrane layers to optimize flow distribution
    Material: Polypropylene mesh

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Reverse Osmosis Membrane.

industrial reverse osmosis membrane for water treatment polyamide thin-film composite RO membrane high-pressure RO membrane for manufacturing equipment reverse osmosis membrane replacement for machinery contaminant removal membrane for industrial

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

Application Fit & Sizing Matrix

Operational Limits
pressure: Max 1000 psi (69 bar)
flow rate: 0.5-2.0 GPM per 8-inch element
temperature: 5-45°C (41-113°F)
slurry concentration: Max 0.1% solids by weight
Media Compatibility
✓ Municipal drinking water ✓ Brackish groundwater ✓ Industrial process water
Unsuitable: High concentration of oils, greases, or organic solvents
Sizing Data Required
  • Feed water quality analysis (TDS, SDI, pH)
  • Required permeate flow rate (GPM or m³/day)
  • System recovery rate target (%)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Membrane Fouling
Cause: Accumulation of suspended solids, organic matter, or biological growth on membrane surfaces, often due to inadequate pre-treatment, high feedwater turbidity, or insufficient cleaning protocols.
Membrane Scaling
Cause: Precipitation of sparingly soluble salts (e.g., calcium carbonate, calcium sulfate, silica) on membrane surfaces, typically resulting from high feedwater concentration, improper pH control, or exceeding recovery limits.
Maintenance Indicators
  • Significant drop in permeate flow rate or increase in differential pressure across the membrane (indicating fouling or scaling)
  • Visible discoloration, biofilm formation, or particulate deposits on membrane surfaces during inspection
Engineering Tips
  • Implement robust pre-treatment (e.g., multimedia filtration, antiscalant dosing, UV sterilization) tailored to feedwater quality to minimize fouling and scaling potential
  • Optimize cleaning-in-place (CIP) procedures with appropriate chemical agents (acids for scaling, alkalis for organics, biocides for biofouling) at correct intervals based on performance monitoring

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ANSI/NSF 58 - Drinking Water Treatment Units ASTM D4195 - Standard Guide for Water Analysis for Reverse Osmosis Application
Manufacturing Precision
  • Bore Diameter: +/-0.02mm
  • Membrane Thickness Uniformity: +/-5%
Quality Inspection
  • Salt Rejection Test (ASTM D4516)
  • Burst Pressure Test (ASTM D1599)

Factories Producing Reverse Osmosis Membrane

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the typical lifespan of an industrial reverse osmosis membrane?

Industrial RO membranes typically last 3-5 years with proper maintenance, depending on feed water quality, operating pressure, and cleaning frequency.

How does the polyamide thin-film composite material improve membrane performance?

Polyamide thin-film composite provides superior salt rejection (up to 99.8%), higher flux rates, and better chemical resistance compared to traditional cellulose acetate membranes, making it ideal for industrial applications.

What maintenance is required for reverse osmosis membranes in manufacturing equipment?

Regular maintenance includes monitoring pressure differentials, conducting periodic clean-in-place (CIP) procedures with approved chemicals, replacing pre-filters, and sanitizing to prevent biofouling and scaling.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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