The Camfil Farr RF-180 is a new concept in locomotive air filtration, this "hybrid" integrates the high efficiency and trouble-free performance of paper-type filters into the popular bag configuration. The RF-180 combines the best of both worlds.
With conventional bags, oil adhesive in the filter media tends to migrate during service, leading to a variety of problems. Oil and dirt carryover can plug the turbo labryrinth seals, which in turn causes oil to escape up the exhaust stack or into the engine. Turbo coolers may also become plugged, resulting in higher air box temperatures. The RF-180 uses a special outer layer of material that keeps the oil inside the bag and out of turbochargers, aftercoolers and engines.
The RF-180 Bag-Type:
- Has an average efficiency of 99% - very close to that of paper filters and considerably higher than the efficiencies of most conventional bag filters.
- Installs readily in any existing bag housing. The outside of the filter remains dry and oil-free for cleaner and easier handling.
- Recommended six month change-out cycle offers double the life of conventional bags - yet costs less.
Extended tests of the RF-180 were performed at major Canadian railroads using new engines and new housings. Bags were removed at intervals of 93 days, 151 days, and 220 days. Pressure drop readings and laboratory analysis showed that the RF-180 would last at least six months and still have life remaining. As a result the RF-180 bags have gained wide range acceptance.