Description
B. retard-chamber-big
APPLICATION
HD Retarding Chamber is used with Alarm Valve Trim
when variable pressure is anticipated in the system. It
is a holding tank to prevent activation of the Sprinkler
Alarm during water pressure surge, but permits the
activation of alarm on sustained flow. The Retarding
Chamber is part of UL Listed and FM Approved Alarm
Valve Trim. The Retarding Chamber is made of stainless
steel material and rated for 17.5 bar pressure.
OPERATION
Due to sprinkler operation, water starts flowing and
clapper of Alarm Valve opens, allowing the water flow
to Sprinkler Alarm port. The Sprinkler Alarm port is
connected to Retarding Chamber through Restriction
Nozzle assembly. When the flow through inlet of
Restriction Nozzle exceeds the drain nozzle flow, the
Retarding Chamber begins to fill and there by flowing
to sprinkler alarm and pressure switch to activate the
alarm. Use of Retarding Chamber prevents the false
alarm in variable pressure system.
MAINTENANCE
The Restriction Nozzle assembly need to be
inspected and cleaned for possible blockage of
Orifice and Screen. More frequent cleaning may be
required depending on water quality with respect to
water borne debris. The owner is solely responsible for
maintaining their fire protection system and devices in
proper operating condition
