Busch MRV-81

Extended-surface Ambient Air Filtration Unit

The Busch International MRV-81 provides an ultra-clean environment for appliucations motor rooms, control rooms, substations, transformer vaults, pump rooms, and laboratories. MRV-81ís are shipped completely assembled, factory tested, and ready for single connection to a main power source. Start-up is quicker and maintenance is simplified.

MRV-81, with extended-surface filtration, is a state-of-the-art design that uses a single stage of long-life, high efficiency fabric filtration cartridges. These cartridges are cleaned periodically by pulsations of compressed air.

After 400 to 600 hours of operation, a cleaning cycle, using short, compressed air pulsations, is initiated. This permits minimum maintenance throughout the life of the extended-surface tubes. Pulsations can be automatically initiated when pressure drop exceeds a predetermined level, or manually activated at convenient intervals.

MRV-81 has superior efficiency when compared with other replaceable-media ambient air filtration systems. Standard efficiency is 99% on particles 2 microns and above; 90% on 0.5 to 1 micron. This efficiency is especially significant in environments with corrosive gas-laden particles. In these instances, the MRV-81 substantially reduces deterioration of the equipment being ventilated.

MRV-81ís are completely factory assembled/wired/tested before shipment. Units up to 80,000 scfm are one-piece construction; larger units may be shipped in two pieces. Virtually any accessories can be added, including heating/cooling coils, economizer control systems, evaporative coolers, humidifiers, and gas adsorbers. Wiring of temperature control system, starters, disconnect switches, and relays will be done in accordance with purchaserís specific electrical standards.

The design incorporates a steel base, steel plate floor and rugged wall sections with closely spaced structural reinforcement. Centrifugal fans are of backwardly curved, power-limiting design.