The PV range of dual acting pressure relief vents is a new development in the world of pressure relief vents for gaseous extinguishing system. The vents are gravity balanced for fool proof operation, and apart from that the vents are designed to provide a great validated efficiency factor of free vent area at all pressures. The pressure vent blades start to open at above 60 to 80 Pascal’s and is designed to be fully open at 125 Pascal’s pressure in both directions. The special design provides more than 75% free vent area at 125 Pascal’s room pressure, which is measured at the mentioned reference pressure. This means you need less vents, smaller holes, less builders work, smaller vents, and we now provide a greater size range.
The range comes with a 2 hour fire rating to EN1364-1 including certification, as well as verification of its operation. Detailed measurement reports are available upon request.
The PV range is supplied in two kits. One for internal use and one for external use. The PV vent only is used for internal and the PV vent with a louvre is used for external venting. As the vent opens in both directions the external louvre can be provided in a fixed blade louvre or dynamic (more weather proof) louvre.
When mounting the PV range in doors or narrow walls the external wall flange is used as a cover trim.
