SEDM - Smoke extraction damper - multi
Page 54
Version 2022-12-20
TPM 156/22
III. MATERIAL, FINISHING
Material
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Damper casings and blades are made of fire resistant asbestos free boards made of mineral fibres.
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Fasteners are galvanized.
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According to the customer's requirements, damper can be made of stainless material.
Specifications for stainless-steel models – classification of stainless steel:
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Class A2 – Food-grade stainless steel (AISI 304 – EN 17240)
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Class A4 – Chemistry-grade stainless steel (AISI 316, 316L – EN 17346, 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 actuator).
The following components, including the fasteners, are made from stainless steel at all times:
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Damper body and all components permanently attached
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Blade´s holders, including pins, metal parts of blade
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Inspection hole cover and fasteners (if they are parts of the cover)
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 blade,
actuators, 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
variants.
The blade 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.
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The actuator cover is made of fire-resistant material (fire protection board).
IV. INSPECTION, TESTING
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The appliance is constructed and preset by the manufacturer, its operation is dependent on proper installation and
adjustment.
