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Smoke Control Damper
SDR
2
-M
Lindab reserves the right to make changes without prior notice
Last modified: 2021-10-26
Rev: 2021-03-26
10. Material
10.1.
Damper casings and blades are made of fire resistant asbestos free boards made of mineral fibres. Fasteners are gal-
vanized.
10.2.
According to the customer's requirements, damper can be made of stainless material.
Specifications for stainless-steel models
– classification of stainless steel:
• Class A2 – Food-grade stainless steel (AISI 304 – EN17240)
• Class A4 – Chemistry-grade stainless steel (AISI 316, 316L – EN17346, 17349)
The respective stainless steel is the material for all components present or accessing the damper interior; components
outside the damper body are typically from galvanised sheet metal (fasteners for mounting the servo drive or mechanics,
mechanics components except Item 4), frame components.
The following components, including the fasteners, are made from stainless steel at all times:
1. Damper body and all components permanently attached
2. Leaf holders, including pins, metal parts of leaf
3. Control components inside the damper (leaf angle selector, pin with lever)
4. Mechanical components entering the interior of damper body (lower sheet of mechanics, lock holder “1”, lock lever “2”,
lock spring, 8 dia. stopper pin, mechanics pin)
5. Inspection hole cover including the clip and fasteners (if they are parts of the cover)
6. Bearing for torque transfer from the lever with pin on the angle selector at the leaf (made from AISI 440C)
The leaf of the damper is made from three Promatect-H sheets, thickness 20 mm, connected with galvanised nailed “U”
connectors which are sealed with Promat K84 from the outside.
Plastic, rubber and silicon components, sealants, foaming bands, glass-ceramic seals, housings, brass bearings of the leaf,
servo drives, and end switches are identical for all material variants of the dampers.
Some fasteners and components are available in one class of stainless steel; the type will be used in all stainless-steel vari-
ants.
The leaf in the variants for chemical environments (Class A4) is always treated with a coating of chemically resistant Promat
SR.
Any other requirements for the design shall be considered atypical and shall be addressed on an individual basis.
Material, finishing
11. Inspection, testing
11.1.
The appliance is constructed and preset by the manufacturer, its operation is dependent on proper installation and
adjustment.
Inspection, testing
