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US 2023/0088239 A1Published application
System for maintaining integrity of a dry pipe system with heated cabinet and flow restrictor valve
AssigneeAGF Manufacturing, Inc.
InventorsBentley F. GLEESON, Michael B. FERRUCCI, George J. MCHUGH IV, James P. MCHUGH
Life of this patent
Estimating the term…
Abstract
A system and method for maintaining the integrity of a dry pipe sprinkler system. The system includes an auxiliary drain including a main collection pipe, a heater having a bracket configured to attach the heater to the main collection pipe of the auxiliary drain, the bracket including a deflector configured to direct heat from the heater onto the main collection pipe, and a self-draining apparatus configured to receive excess water from the auxiliary drain.
Claims4
A flow restrictor valve, the flow restrictor valve comprising:
- a plunger configured to be held in an open position by a compression spring, the open position configured to allow a liquid or gas to flow through the flow restrictor valve and a closed position in which a flow of the liquid or gas generates a velocity sufficient to cause the compression spring to compress and engage an outer edge of the plunger with a seat of a retaining member to prevent the flow of the liquid or gas through the flow restrictor valve.
Dependencies are inferred from the claim text.