Roof Explosion Vents

And since these vent systems depend solely on proper field installation they could be extremely unreliable.

Roof explosion vents.

Explosion vents are low burst pressure membranes of calculated area fixed over an opening on the structure to be protected. In the event of a deflagration the vents provide a rapid and unrestricted opening at a predetermined burst pressure pstat allowing combustion gases to expand and flow through the open vent. Many blow out explosion and pressure relief panel systems are larger or heavier than nfpa 68 recommends for maximum performance. Explovent roof explosion vents are designed for buildings where the exterior wall area is insufficient internal rooms or where exterior walls are obstructed thus preventing the use of wall vents.

Cs explovent is the only field testable explosion and pressure relief vent system. They let moisture and hot air exit the attic but they aren t nearly as effective as other types of roof vents and homes generally need to have several of these units for the best results. Alternatively when the process cannot be vented safely outside the explosion vent opens and directs the fireball into a flameless venting device like flamquench. Explosion release smoke vent latch options are designed to limit structural damage to a building in the event of an explosion by releasing internal pressure.

These vents are static vents that are placed over holes in the roof close to the roof ridge. Invented by a roofer to defeat the harsh canadian winters this csa approved static box vent has been independently tested to block 99 99 of snow and rain even in severe storm conditions. This roof mounted explosion relief vent has an aluminum insulated lid with an r value of 9 16 and utilizes factory mutual approved fasteners. The explosion vent limits the stress on the vessel and allows it to maintain structural integrity.

The mv rd explosion vent is designed for high cycling applications such as in dust collectors bag houses and bulk storage units that experience vacuum pressures up to 12 psig 24 4 inhg. Unlike box vents which are square off ridge vents are usually much longer and thinner. Roofers often complain that roof vents battered by storms can fail allowing blowing snow and rain to penetrate the attic. The pressure is released and the fireball escapes through the vent into a safe area outside the facility.

The xrv ic roof vent features a metal lid held in place by factory mutual approved explosion relief fasteners. Explosion release mechanism shown is preset and factory tested to release at between 25 30 pounds per square foot 122 146 kg m2 of pressure on the underside of the covers.