38
RDT-43-0921
®
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FDMA-PM
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Tab 9.3.2. Correction to the weight filter A
w
[m/s]
2
3
4
5
6
7
8
9
10
11
12
K
A
[dB]
-15,0
-11,8
-9,8
-8,4
-7,3
-6,4
-5,7
-5,0
-4,5
-4,0
-3,6
Diagram 9.3.3.Relative level expressing the shape of the spectrum Lrel
w
[m/s]
h [Hz]
63
125
250
500
1000
2000
4000
8000
2
-4,5
-6,9
-10,9
-16,7
-24,1
-33,2
-43,9
-56,4
3
-3,9
-5,3
-8,4
-13,1
-19,5
-27,6
-37,4
-48,9
4
-3,9
-4,5
-6,9
-10,9
-16,7
-24,1
-33,2
-43,9
5
-4,0
-4,1
-5,9
-9,4
-14,6
-21,5
-30
-40,3
6
-4,2
-3,9
-5,3
-8,4
-13,1
-19,5
-27,6
-37,4
7
-4,5
-3,9
-4,9
-7,5
-11,9
-17,9
-25,7
-35,1
8
-4,9
-3,9
-4,5
-6,9
-10,9
-16,7
-24,1
-33,2
9
-5,2
-3,9
-4,3
-6,4
-10,1
-15,6
-22,7
-31,5
10
-5,5
-4
-4,1
-5,9
-9,4
-14,6
-21,5
-30
11
-5,9
-4,1
-4
-5,6
-8,9
-13,8
-20,4
-28,8
12
-6,2
-4,3
-3,9
-5,3
-8,4
-13,1
-19,5
-27,6
10. Material
10.1 Damper bodies are supplied in the design made of galvanized plate without any other surface
finishing. Damper blades are made of fire resistant asbestos free boards made of mineral fibres.
Control devices of dampers has cover from mechanically resistant and standing plastic and rest
of the parts is galvanised without further surface treatment. Springs are galvanized.
Thermal protective fuses are made of sheet brass, thickness = 0.5 mm. Fasteners is galvanized.
Fasteners is galvanized.
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 – ČSN 17240)
• Class A4 – Chemistry-grade stainless steel (AISI 316, 316L – ČSN 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 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)
IX. Material, finishing
