FDMQ 120 - Fire damper
Page 44
Version 2022-12-20
TPM 166/22
III. MATERIAL, FINISHING
Material
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Damper casing and damper blade are made of galvanized sheet metal without any other surface finish.
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Damper blades are made of fire resistant asbestos free boards made of mineral fibres.
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Control devices of dampers has cover from mechanically resistant and standing plastic and rest of the parts is galvanised
without further surface treatment.
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Thermal protective fuses are made of sheet brass, thickness 0,5 mm.
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Fasteners and springs 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 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 casing and all components permanently attached
2)
Blade´s holders, including pins, metal parts of blade
3)
Control components inside the damper (L-profile, pin with lever, rod, fasteners)
4)
Mechanical components entering the interior of damper casing (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 damper blade is made from a single piece of homogeneous material Promatect-MST, thickness 40 mm or is composite
from two piece Promatect-H, thickness 20 mm, connected with galvanised nailed “U” connectors which are sealed with
Promat K84 from the outside.
Thermal fuse is identical for all material variants of the dampers. Upon specification by customer, the thermal link may be
made from A4 from stainless steel sheet metal.
The temperature-dependent initiator of the servo drive (sensor) is modified for stainless-steel variants of the dampers; the
standard galvanised screws are replaced with stainless-steel M4 screws of corresponding class the counterpart has
stainless-steel riveting M4 nuts.
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 damper 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.
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.
