Retrotec Design and Evaluation for Peak Pressure and Agent User Manual download pdf

SP710 Page 1 of 4 rev-2010-07-14

Design and evaluation for peak pressure and agent retention time

Peak Pressure Damage

Damage caused by peak pressures is a huge potential liability that clean agent system installers

must deal with. During a clean agent discharge, the enclosure must have sufficient leakage to

prevent excessive pressures from building, but be tight enough to satisfy retention time

requirements.

The graph shown below is actual data recorded from a static pressure probe during a discharge

test. The maximum pressure reached here is equivalent to about 20 pounds per square foot,

which is double the "specified enclosure pressure limit" for most enclosures.

Excessive peak pressure is normally resolved by the installation of a pressure relief vent but no

comprehensive research had been done to determine the exact amount of venting required,

until now. Retrotec has just completed a five-year study along with Fike, 3M, Ansul, Kidde-

Fenwal, DuPont, Tyco, and Chemetron in which four inert agents and four halocarbons were

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SP710 Page 1 of 4 rev-2010-07-14 Design and evaluation for peak pressure and agent retention time Peak Pressure Damage Damag

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SP710 Page 2 of 4 rev-2010-07-14 discharged into the same test chamber at varying leakage and environmental conditio

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SP710 Page 3 of 4 rev-2010-07-14 Additionally, many pressure relief vents are electronically or pneumatically actuated. This ca

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SP710 Page 4 of 4 rev-2010-07-14 RSH PRV's have a 2 hour fire rating as certified by EN1363, and are the on

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Retrotec Design and Evaluation for Peak Pressure and Agent User Manual