DRK

DRK

DRK

Product catalog summary
Functionality
The DRK pressure-relief damper features lamellas connected via an external rod system. These lamellas are pre-adjusted at the factory to a customer-specified triggering pressure, which can be easily adjusted later. The lamellas remain closed under normal conditions and open when the pressure exceeds the set value, returning to their original position once the pressure normalizes. The lamella arrangement must be horizontal.
Design
The damper has a welded housing suitable for both horizontal and vertical airflow, providing a 100% free cross-section when open. It is designed for installation in round ducts with flange connections or plug-in ends. The response pressure is adjustable to customer specifications, and the damper is airtight according to DIN 1946/4 standards for diameters less than 710 mm.
Construction
The housing is constructed from C-profiles in galvanized steel or aluminum, joined by screwed corner-pieces without welding. It features 36 mm connecting flanges (50 mm available on request) and a housing depth of 165 mm. The lamellas are made from torsion-free, hollow-profile aluminum, with replaceable seals and temperature resistance up to 80°C. The damper axes are supported by slide-bearings made of oil-soaked sintered bronze, with a diameter of 18 mm. The leak-rate complies with CEN 1751, Class 2.
Options
Available options include interior insulation with mineral wool, anodized or powder-painted finish, stainless steel construction, ball bearings, isolated lamellae, limit switch, mesh grid, 200° version, vertical airflow, and combination with WSG.
Dimensions
The document provides detailed dimensions and pressure loss data for different configurations, emphasizing the importance of selecting the appropriate size and specifications for optimal performance.
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Catalog excerpts

DRK-1

DRK pressure-relief damper DRK DRUCKENTLASTUNGSklappe Lucoma AG Sdn Bhd 3A Jalan Dewani 1/1 Taman Perindustrian Dewani 81110 Johor Bahru, Johor Malaysia Phone +6 07 3319310 Fax +6 07 3317310 www. lucoma.com [email protected]

 Open the catalog to page 1
DRK-2

DRK FUNcTION · Funktion Function The lamellas are connected via an external system of rods. Using an external mechanism, the louvers are pre-adjusted at the factory to the triggering pressure specified by the customer. Using this mechanism, the triggering pressure can be adjusted at any time in a simple manner. The lamellas are normally closed. If the pressure exceeds the predefined value, the lamellas open and automatically return to their initial position as soon as the pressure drops again. The lamella arrangement must be horizontal. Funktion Die Lamellen sind über ein aussenliegendes Gestänge...

 Open the catalog to page 2
DRK-3

DRK Construction · AUSFÜHRUNG Construction The housing is made of C-profiles, in either galvanized steel or aluminum, joined by screwed corner-pieces – no welding – that fits all common ducting connections. 36 mm connecting flanges (50 mm on request). Housing depth 165 mm. From 1200 mm or higher with middle bar. Torsion-free, hollow-profile lamellas in 100 mm-wide aluminum with replaceable seals, temperature-resistant up to 80 °C with additional lateral seal. Damper axes in aluminum, pressed into the specially prepared recesses in the lamella profiles and supported by slide-bearings made of oil-soaked...

 Open the catalog to page 3
DRK-4

DRK DIMENSIONS · MaSSE DRK < 80 Pa Stainless steel Pressure loss Pressure loss (Pa) / Druckverlust (Pa) Klappe ganz offen Completely open Inflow air-speed (m/s) / Anströmgeschwindigkeit (m/s)

 Open the catalog to page 4

All Lucoma catalogs and technical brochures

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.