The Globe Model “H” Retarding Chamber is an accessory which is used with variable pressure wet sprinkler systems where water motor alarms and / or pressure switches are used in conjunction with Globe's Alarm Check Valves. It serves primarily as a hydraulic time delay to prevent most false alarms associated with fluctuating water supply pressures.
RETARDING CHAMBER MODEL HGFV-500 (.pdf)
Model H – 1/2-inch Inlet Retard Chamber: Where retarding chambers are specified for use in wet-pipe sprinkler systems they shall be specifically listed for such use. Retard chamber shall be a single cast iron body, one gallon capacity, and rated for a working pressure of 175 psi. Retard Chamber shall be UL listed and FM approved and used with the Globe Model H Series Alarm Check Valves in systems have fluctuating water supplies, which could result in false alarms. Retard chamber shall be the Model H; as manufactured by Globe Fire Sprinkler Corporation.
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