ARK2

Application

• Pressure relief dampers for the protection of internal spaces from differential pressures higher than set maximum levels
• When the set maximum differential pressure is exceeded, the blades automatically open to relieve the excess pressure
• Pressure peaks will be reliably controlled
• The differential pressure can be adjusted from 50 – 1000 Pa (B > 600 mm: 600 Pa max.)

Special features

• Robust, maintenance-free construction
• Maximum differential pressure: 5000 Pa
• Air leakage with back pressure, in closing direction, to EN 1751, class 4
• Damper for negative or positive pressure (air extract or discharge)
• Operating temperature 0 to 80 °C
• Maintenance-free DU bearings with Teflon coating, bearing shafts made of stainless steel
• Each blade is locked with a factory set permanent magnet
• Adjustable differential pressure for blade opening: 50 – 1000 Pa, depending on width

Nominal sizes

• B: 200, 400, 600, 800, 1000, 1200 mm (intermediate sizes: 201 – 1199 mm, in increments of 1 mm)
• H: 345, 675, 1005, 1335, 1665, 1995 mm (intermediate sizes 355 – 505, 685 – 835, 1015 – 1165, 1345 – 1495, 1675 – 1825 mm in increments of 1 mm)
• Any combination of B × H

Construction

• Galvanised sheet steel, duct connection without flange holes
• A2: Stainless steel
• G: Duct connection with flange holes

Parts and characteristics

• Ready-to-install pressure relief damper
• Blades with low-friction bearings
• One retaining element with a permanent magnet for each blade
• Seal
• Travel stop (angle section)

Construction features

• Rectangular casing, material thickness 2 mm
• Blades, material thickness 3 mm
• Flanges on both sides, suitable for duct connection, with or without flange holes
• Adjustable retaining element to adapt to various pressures (factory set as ordered)
• Blades can be moved independent of complementary to one another
• Blades with perimeter seal, pressed against travel stop (angle section) when closed
• Blade shafts with maintenance-free plastic bearings

Materials and surfaces

• Casing and travel stop (angle section) made of galvanised sheet steel, material no. EN 10346-DX51D+Z140-200
• A2 construction: Casing and travel stop (angle section) made of stainless steel, material no. 1.4301
• Blades made of aluminium, material no. AlMg3
• Blade holders made of stainless steel, material no. 1.4301
• Blade shafts made of stainless steel, material no. 1.4104
• Plate of the retaining element made of steel, material no. 1.0718
• PPS bearings
• Neoprene seals
• P1: Powder-coated, RAL CLASSIC colour
• PS: Powder-coated, DB colour

Standards and guidelines

• Casing air leakage to EN 1751, class C
• Closed blade air leakage (against the intended airflow direction) to EN 1751, class 4

Maintenance

• Maintenance-free as construction and materials are not subject to wear
• Contamination should be removed as it may lead to corrosion and to increased closed blade air leakage