The cartridge that decides how long your membrane lives.

A uniform-density cartridge loads all particles at its surface and blinds quickly. RO Protect cartridges are melt blown in multiple zones, coarser outside and finer toward the core, so larger particles are captured in the outer zones and the full depth of the media does the work. That structure holds 2 to 3 times the dirt of standard PP spun cartridges before reaching change-out pressure drop.

Ultra is the value option for general duty from 1 to 25 micron at up to 60 C. Eco adds thermal stability to 80 C. Eco Plus doubles dirt-holding capacity at 1, 5, and 10 micron. Prime is the industrial grade rated to 80 C with seven end-fitting options. Extreme is the 0.5 micron, weld-free choice for food and pharma duty, stated as compliant with FDA 21 CFR 177, declaration on request. Send us your flow, fluid, and target micron rating and we will confirm the variant.

Yes, that is the range's core duty and the reason it carries the RO Protect name. Correct prefiltration reduces silt density index and turbidity before the membrane, which extends membrane life many times over the cartridge cost. For high flow rates, consider high flow formats to cut element count and change-out labour.

Standard lengths run 9.75 to 70 inch including jumbo diameters, with DOE and six other end-fitting options on Eco Plus, Prime, and Extreme. Media and core are virgin polypropylene, thermally bonded with no binders, adhesives, or surfactants, so there is zero media migration and zero extractables in service.

Melt blown cartridges are depth filters: particles are held through the whole wall in a graded fibre matrix, which gives a high dirt-holding capacity at a lower element cost, suited to pre-filtration and general process duty. Pleated cartridges filter mainly at the surface and give tighter, absolute-rated cut-offs for critical final filtration. Many trains run melt blown cartridges ahead of pleated elements to protect them.

RO Protect cartridges are made in standard lengths and diameters with DOE, 222 and 226 end fittings, so most can be supplied as dimensional and fitting equivalents to the cartridges you run. Send your current part number and we return a cross-reference; we prove service life on your line with a sample rather than claim it.

Viscous liquids, higher temperatures and organic solvents where a polypropylene (olefin) cartridge is not suitable. Its polyester media is thermally bonded in moulded layers with a controlled porosity gradient, is pre-washed, and is rated to 100 C at 1, 3, 5 and 10 micron.

A depth-pleated polypropylene cartridge: multi-layered, continuously graded media folded into pleats, so it combines depth loading with pleated area. The thick media suits gels and agglomerates. It is used ahead of RO and seawater desalination, on condensate and hot water recovery, and in food, beverage, pharmaceutical, paint, fuel and electronics duty. Pleated polypropylene and glass fibre beta 5000 versions are also listed.

Our catalogue gives 3 to 5 GPM per 10 inch element in water as a guide. Higher flows need longer cartridges or multi-cartridge housings. We size the element count on your flow, solids and target change-out interval.