RPS Series (High Impact Techno Polymer)
This device is similar to a conventional breather, but it incorporates a relief valve set at 5 or 10 PSI and a vacuum breaker and filter. When the level rises, air is compressed rather than being expelled. Thereafter, changing fluid levels are accommodated by the changing size of the air bubble in the reservoir, instead of breathing by as much as 90% to 95%, increasing the life of the breather filter by a factor of 10. They are recommended systems that are expected to operate in extremely dusty environments.