Retrotec Design and Evaluation for Peak Pressure and Agent Retention Time - Manual (Page 3)

SP710 Page 3 of 4 rev-2010-07-14
Additionally, many pressure relief vents are electronically or pneumatically actuated. This can
cause reliability issues, especially during a fire when controlling circuits may be damaged.
Gravity actuation is the most failsafe method.
Retrotec is pleased to offer pressure relief vents for both inert agents and halocarbons along
with our state of the art software that will accurately predict peak pressures and required free
vent area based on live test data.
RSH PRV'S for inert agents
The RSH Series of PRV's are
gravity actuated; they are
fully closed at 80 Pa and fully
open at 95 Pa, ensuring safe
dissipation of peak pressure
while remaining unaffected
by HVAC pressures.
RSH Dual Flow PRV's for
halocarbons
The graph below shows live test data from an FM200 discharge. As observed, the temperature
change in the enclosure caused by the agent discharge creates a negative pressure spike which
is then followed by a positive pressure spike caused by the nitrogen blowdown.
The RSH Dual Flow PRV's have been engineered to open in both
directions, eliminating the need to install 2 single flow vents in opposite
directions, saving both time and money.