RO membrane housing 4" 4040 2 x 40" 450 PSI, DIMM ROEU-H4E3C2

High-pressure reverse osmosis membrane housing

The DIMM membrane housing reference ROEU-H4E3C2 (article code ART096502) is a pressure vessel designed to house and protect reverse-osmosis membranes of the 4040 (4"×40") format. Manufactured from reinforced filament-wound fibreglass (FRP), this membrane vessel provides the sealing and mechanical strength required for the operation of an industrial or municipal reverse-osmosis system. It is the central structural element of any desalination, ultra-pure water production or borehole water treatment module.

Technical specifications

This model features a nominal diameter of 4" and accommodates a configuration of 2 x 40" membrane(s) in series. The maximum operating pressure is 450 PSI (31 bar), placing it in the low to medium pressure range. Connection is made in BSPT 3/4" F - BSPT 1/2" F, ensuring a reliable hydraulic link with the plant's piping. The end-port configuration (inlet and outlet at the extremity) greatly simplifies rack integration and membrane replacement.

Materials and durability

The composite fibreglass / epoxy resin shell offers excellent resistance to corrosion, chlorides and aggressive waters, where steel would quickly degrade. The closure heads and caps are dimensioned to withstand repeated pressurisation cycles without creep. This construction guarantees a long service life in continuous operation, including on brackish or sea water, and reduces long-term maintenance costs significantly.

Applications

These membrane housings equip reverse-osmosis units for drinking-water production, brackish and sea-water desalination, industrial demineralisation, boiler feed, the food and pharmaceutical industries, and municipal treatment stations. They are compatible with standard market membranes (Dow FilmTec, Hydranautics, Toray, LG) in the corresponding format, which facilitates procurement and interchangeability of consumables.

Installation and service

The vessel is mounted horizontally or vertically on a rack, in series or parallel depending on the target flow rate. The 4040 format and 2 x 40" configuration determine the number of housed membranes and therefore the skid's production capacity. DIMM also supplies the compatible adapters, Victaulic couplings and sleeves to complete the assembly. Respecting the maximum pressure of 450 PSI and the recommended tightening torques guarantees safe and durable operation for many years.

Compatibility and integration

This membrane housing of diameter 4" integrates into the standardised racks on the market and accepts spiral-wound 4040 membranes from most manufacturers. Its end-port configuration allows rapid replacement of the elements through the extremity, without full removal of the vessel, which reduces downtime during maintenance operations. The O-rings and closure caps are individually replaceable, extending the service life of the vessel. For a multi-stage installation, several vessels can be linked in cascade in order to optimise the overall conversion rate of the reverse-osmosis unit and reduce the specific energy consumption.

Why choose DIMM

A water-treatment specialist for more than thirty years, DIMM selects robust membrane housings, certified for the stated pressure of 450 PSI and factory-inspected. Each reference, including ROEU-H4E3C2, is associated with a unique article code (ART096502) guaranteeing full traceability and rapid resupply of wear parts. Our technical teams support the sizing of the skid, the choice of membranes and connection accessories, and ensure a responsive after-sales service. This level of service makes DIMM membrane housings a reliable solution for design offices, installers and operators of water-production stations.