3M Zeta Plus U and UW Series Filter Cartridges for the power generation industry are offered in two formulations. The U formulation is recommended for use with oils contaminated mainly with carbon particles, and the UW formulation is specifically formulated for use with oils contaminated with both carbon particles and moisture.
Zeta Plus charge-modified filter media uses electrokinetic adsorption to remove contaminants and colloid materials smaller than those filtered by mechanical sieving alone. 3M Zeta Plus U and UW Series Filter Cartridges are used for reconditioning insulating oils in power generation. Two grades of media, 05 and 10, are available: 05 grade provides efficient reduction of particle contaminants in most insulation oil applications, while the 10 grade provides efficient reduction of ultrafine particles.
Effective Fine Particle and Moisture Reduction
As oil specifications get tighter, finer filtration is required to meet those demands. The 10U formulation was developed to help reduce smaller contaminants such as fine carbon particulate.
Water contaminates the dielectric oil either from the atmosphere or breakdown of the oil itself. Water contamination is usually accompanied by particulate contamination, which then increases both the filtration and water reduction workload. 3M Zeta Plus U and UW Series Filter Cartridges formulations help address both problems.
Automatic Shut-off upon Saturation
The construction of Zeta Plus 05UW and 10UW cartridges allow it to plug on saturation with water, effectively shutting off flow. This feature is important for two reasons. First, it provides a clearly defined end-point to filter life. Second, the automatic shut-off helps prevent recontamination of the filtrate with water.
Optional cartridge reduction baskets are available for manually or mechanically installing and removing cartridges.