Patent ID: 9144700
Filing Date: 2015-09-29
Classification: A62C

Abstract:
1. A water-based fire protection system comprising: a dry pipe sprinkler system comprising at least one fusible sprinkler, a source of pressurized water, a piping network connected to the at least one fusible sprinkler, one or more drains, and a dry pipe valve coupling the source of pressurized water to the piping network, the dry pipe valve having a clapper, the piping network pitched toward the one or more drains, and the one or more drains including a drum drip; a nitrogen generator coupled to the piping network, the nitrogen generator operable to pressurize the piping network with nitrogen and maintain the clapper of the dry pipe valve in a closed position until the water-based fire protection system is actuated; and at least one vent positioned within the piping network, the at least one vent operable to allow gas including oxygen displaced by the nitrogen to exit the piping network at a preset or adjustable limit while maintaining enough pressure within the system to prevent the clapper of the dry pipe valve from opening until the water-based fire protection system is actuated to thereby increase the concentration of nitrogen and decrease the concentration of oxygen in the piping network to reduce or eliminate the rate of corrosion in the piping network.