Product description
4 inch reverse osmosis membrane for commercial and industrial water treatment
The 4″ Reverse Osmosis Membrane is designed for commercial and industrial water treatment systems where high efficiency, stable rejection and compact system design are required. These membrane elements are widely used in applications where space efficiency, lower energy consumption and consistent permeate quality are important.
With industry standard dimensions, 4″ RO membranes are suitable for new installations as well as replacement and retrofit applications in a wide range of water treatment systems.
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 process delivers:
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high rejection of dissolved solids
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stable permeate quality
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effective removal of salts and contaminants
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reliable performance under continuous operation
Reverse osmosis is a key technology for producing high quality process and purified water.
Membrane construction
4″ RO membranes supplied by Filtra International are manufactured using advanced thin film composite membrane technology.
Typical construction elements include:
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polyamide thin film composite membrane layer
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reinforced support structure for mechanical stability
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polypropylene feed spacer to optimise flow distribution
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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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protective outer wrap for handling and operation
This construction supports long service life and consistent performance.
Performance characteristics
4″ RO membranes are designed to combine efficient permeate production with stable rejection performance.
Key performance characteristics include:
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optimised active membrane surface area
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consistent salt rejection
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fast rinse up during commissioning
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stable flux behaviour
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reduced fouling tendency
Different membrane performance ranges are available to match energy efficiency, operating pressure and feed water quality requirements.
Operating conditions
Typical operating characteristics for 4″ RO membranes include:
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operation in commercial and industrial water systems
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compatibility with standard RO cleaning procedures
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defined pH ranges for continuous operation and cleaning
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controlled tolerance to oxidising agents
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suitability for continuous duty
Exact limits depend on the selected membrane range and system design.
Standard dimensions
4″ RO membranes are manufactured to industry standard dimensions:
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nominal diameter: 4 inch
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nominal lengths: 21 inch and 40 inch
This ensures compatibility with standard 4″ pressure vessels and RO system components.
Typical applications
4″ reverse osmosis membranes are commonly used in:
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commercial water purification systems
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industrial process water treatment
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food and beverage water preparation
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boiler feed and cooling system make up
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wastewater reuse and recovery
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laboratory and technical water systems
Key benefits
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Compact membrane size for flexible system design
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Stable rejection and permeate quality
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Lower energy consumption compared to larger systems
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Industry standard dimensions
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Reliable long term operation
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Suitable for continuous commercial and industrial use
Configuration and ranges
The 4″ RO membrane portfolio is available in multiple performance ranges to suit different operating pressures, energy targets and feed water qualities.
Each range is offered in different lengths and performance options to optimise system output and efficiency.
Configuration and quotation
4″ RO membranes are supplied based on system requirements. Selection parameters include:
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membrane performance range
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membrane length
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feed water quality
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operating pressure and temperature
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required permeate quality
Filtra International provides technical support to ensure correct membrane selection and reliable system operation.