KRDP series

• KRDP excess pressure valves are used to regulate pressure difference in fire protection ventilation systems meeting the requirements of DSTU EN 12101-6:2015 "Smoke protection systems. Part 6.Technical requirements for pressure difference systems" (EN 12101-6:2005, IDT; EN 12101-6:2005/AC:2006, IDT).
• When calculating air pressure systems the air leakage through open doors, openings and other leaks are taken into account. When these are closed, the pressure difference between the protected volumetric space (airlock vestibules, smokeproof stairwells, elevator halls, etc.) and the fire occurrence zone (corridors, halls, lobbies, etc.) can reach critical values. In order to regulate the pressure difference in the above volumetric spaces and to allow the doors to open freely on the escape route (rated force 100 N), a KRPD valve must be used.

The device functions both as:

• an excess pressure control valve that automatically opens when a pressure difference occurs;
• a fire-protection, flame-retarding valve that prevents flue gases from entering the protected volumetric spaces.

• The valve is made in a rectangular cross-section of galvanised steel (general industrial version) or stainless steel (corrosion-resistant version), depending on the requirements. The device consists of one or more fire-resistant rotary type blades characterised by a low thermal conductivity coefficient. A spring mechanism mounted directly in the valve body acts as an adjustment element.
• The product is available with two flanges for direct connection to air ducts or with a single flange for installation in a wall.
• The valve can only be mounted in a vertical position and all the axes of the working plates (blades) must be parallel to the floor, and the adjusting element located outside the plates movement trajectory.
• Fire resistance class – EI 120.
• The pressure control range is 20-150 Pa.
• KRDP valve can be used in temperate and cold climates.