Product description
8 inch reverse osmosis membrane for industrial and municipal water treatment
The 8″ Reverse Osmosis Membrane is designed for large scale water treatment systems where high productivity, stable salt rejection and reliable long term performance are essential. These membrane elements are widely used in industrial, municipal and process water applications where consistent permeate quality and energy efficiency are required.
With a nominal 8 inch diameter and standard 40 inch length, these membranes are compatible with industry standard pressure vessels and are suitable for new installations as well as retrofit projects.
Filtration principle
Reverse osmosis membranes operate using a semi permeable thin film composite layer. Feed water is pressurised against the membrane surface, allowing water molecules to pass through while dissolved salts, organic compounds, bacteria and other contaminants are rejected.
This separation process provides:
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high salt rejection
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consistent permeate quality
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effective removal of dissolved solids
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stable performance over long operating periods
Reverse osmosis is considered a critical filtration step in high purity water production.
Membrane construction
8″ RO membranes supplied by Filtra International are manufactured using advanced thin film composite technology.
Typical construction elements include:
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polyamide thin film composite membrane layer
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reinforced support layer for mechanical strength
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polypropylene feed spacer
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permeate collection material with low pressure loss
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anti telescoping devices for dimensional stability
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durable outer wrap for mechanical protection
This construction ensures reliable performance under continuous operation and varying feed water conditions.
Performance characteristics
8″ RO membranes are designed to balance high permeate flow with strong rejection performance.
Key performance characteristics include:
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high active membrane surface area
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stable salt rejection
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consistent flux behaviour
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reduced fouling tendency
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predictable performance during system operation
Different membrane ranges are available to match energy consumption, operating pressure and feed water quality requirements.
Operating conditions
Typical operating parameters for 8″ RO membranes include:
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operation in brackish and process water systems
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suitability for continuous industrial duty
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compatibility with standard cleaning procedures
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defined pH operating and cleaning ranges
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controlled tolerance to oxidising agents
Exact limits depend on the selected membrane range and operating conditions.
Standard dimensions
8″ RO membranes are manufactured to industry standard dimensions:
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nominal diameter: 8 inch
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nominal length: 40 inch
This ensures compatibility with standard RO pressure vessels and system components.
Typical applications
8″ reverse osmosis membranes are commonly used in:
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municipal drinking water production
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industrial process water treatment
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wastewater reuse systems
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cooling tower make up water
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boiler feed water preparation
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desalination of brackish water
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food and beverage water treatment
Key benefits
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High productivity for large scale systems
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Stable salt rejection performance
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Industry standard dimensions
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Reliable long term operation
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Suitable for continuous duty
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Compatible with standard pressure vessels
Configuration and ranges
The 8″ RO membrane portfolio is available in multiple performance ranges to suit different system requirements. Each range is offered in:
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a standard active area configuration
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a higher active area configuration for increased productivity
This allows system designers to optimise energy consumption, output and footprint.
Configuration and quotation
8″ RO membranes are supplied based on system design and water quality requirements. Selection parameters include:
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membrane performance range
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active membrane area
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feed water composition
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operating pressure and temperature
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system recovery rate
Filtra International provides technical support to ensure correct membrane selection for each application.