Fire Suppression Applications
EWCL5 Certified Pressure Relief Vents
Pressure Relief Vents for use with Gaseous Fire Suppression Systems within data centers, oil refineries, and museums across the world, including new builds and large-scale refurbishment projects around the globe.
Gaseous Fire Suppression Systems – under/over pressure venting
The Apreco range of fire suppression and pressure relief vents are designed specifically for over-pressure and under-pressure venting associated with inert and halocarbon Gaseous Fire Suppression Systems, as referred to in BS EN 15004-1:2019 and further detailed in ISO TS 21805:2018. Reference to pressure relief venting within NFPA 2001:2018.(FSSA Application Guide to Estimating Enclosure Pressure & Pressure Relief Vent Area for use with Clean Agent Fire Extinguishing Systems).Apreco fire suppression vents provide protection against over-pressure in the case of inert gas systems such as IG-55 and IG-541 and under-pressure venting with gases such as FM200 and NOVEC 1230.
Apreco fire suppression vents are offered in several standard sizes for installation in both internal and external walls. Providing market-leading performance across a range of pressures. Apreco fire suppression vents are designed to stay closed below 70Pa and fully open at typically between 100 – 125Pa, this allows annual integrity room tests to be performed without the need to block the vents.
Apreco range of Pressure Relief Vents, sometimes called Pressure Relief Dampers, have been successfully tested to meet the free vent area and fire resistance requirements of critical installations.
Tall Buildings – pressurised stairwells
In order to provide safe means of escape from a fire, building designers often use stairwell pressurisation to prevent the stairwell from becoming filled with smoke.
A pressurisation system prevents smoke leaking past closed doors into stairs by injecting clean air into the stair enclosure such that the pressure in the stair is greater than the adjacent fire compartment. Then, if the stair door is opened, the system is intended to maintain a flow of air through the open doorway to oppose smoke flow and prevent contamination of the stair enclosure.
It is important that minimum pressures of 50 Pascals are maintained to keep the smoke out of these stairwells and also that the maximum pressures do not exceed 60 Pascals to ensure that personnel can open doors into the stairwell without undue difficulty. Air pressure control is best achieved using properly designed air pressure relief vents. Apreco’s pressure relief vents satisfy these requirements and give you peace of mind that your building will be safe in the event of a fire.
The pressure relief vent remains closed until the required pressure is exceeded. The combination of blade aerodynamics, weight and position of the centre of gravity of the pressure relief vent blade enables it to operate in this exact way, without the need for electrical motorisation.
BS EN 12101-6:2005 requires pressurised fire escapes to be maintained at 50 Pa and limited to a maximum of 60 Pa.
Apreco’s extensive range of standard air Pressure Relief Vents sometimes referred to as Pressure Relief Dampers are characterised by their ease of installation and accuracy. They do not require any external power source as they work on a balanced blade system.View Products