Mandik NKTM User manual

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These technical specifications state a row of manufactured sizes and models of non-return dampers (further only dampers)
NKTM. It is valid for production, designing, ordering, delivery, assembly and operation.
1. Description…......................................................................................................................
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2. Design......................….………...........................................................................................
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3. Dimensions, weights...................….…...............................................................................
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4. Placement and Assembly.....................….…............................................................….….
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5. Pressure loss…………………….........................................................................................
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6. Damper tightness…………………..….……….....................................................................
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7. Noise data...........…………………..….……….....................................................................
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8. Material…...........................................................................................................................
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9. Inspection, testing.....................................................................................….….................
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10. Logistic terms…...............................................................................................….…........
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11. Assembly…......................................................................................................................
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12. Maintenance…………...................................................….…………………………………
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13. Ordering key…………..................................................................................................….
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Non-return dampers are used to close the duct automatically in case of fan being switched off.
In case of a shutdown of one of the fans at fan parallel configuration, the dampers prevent reverse
airflow.
They can be installed within a duct or at its ends.
Dampers are produced in the following designs:
- loose blades (design .01)
- rod connected blades (design .01T)
Damper characteristic
●dimensions from 200 x 200 to 1400 x 1400 mm (A > 800 with divider)
●blades pitch 82 - 136 mm
●damper length 200 mm
Working conditions
Maximum air circulation speed 12 m.s .
Maximum pressure difference 1500 Pa.
Dampers are suitable for systems without abrasive, chemical and adhesive particles.
Temperature in the place of installation is permitted to range from -20°C to +100°C.
Dampers are designed for macroclimatic areas with mild climate according to EN 60 721-3-3.

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2 4,0 2 7,5
2 4,0 2 8,0
3 5,0 3 8,5
4 5,5 4 10,0
4 6,5 4 10,5
6 7,5 6 12,5
8 9,5 8 14,5
8 11,0 8 16,5
10 13,0 10 19,0
11 14,5 11 21,0
2 4,5 4 9,5
2 4,5 4 10,5
3 5,5 6 11,5
4 6,0 8 13,0
4 7,0 8 14,5
6 8,5 12 17,0
8 10,0 16 20,0
8 11,5 16 22,5
10 13,5 20 27,0
11 15,0 22 29,5
2 5,0 4 11,5
2 5,0 4 12,0
3 6,0 6 13,5
4 7,0 8 15,0
4 7,5 8 16,5
6 9,0 12 19,0
8 10,5 16 22,5
8 12,5 16 25,5
10 14,5 20 30,0
11 16,0 22 32,5
2 5,5 4 13,5
2 6,0 4 14,0
3 6,5 6 15,5
4 7,5 8 17,5
4 8,5 8 19,0
6 10,0 12 22,0
8 11,5 16 25,5
8 13,5 16 28,5
10 16,0 20 33,5
11 17,5 22 36,0
2 6,5 4 15,5
2 7,0 4 16,0
3 7,5 6 17,5
4 8,5 8 19,5
4 9,5 8 21,0
6 11,0 12 24,5
8 13,0 16 28,0
8 14,5 16 31,0
10 17,5 20 36,5
11 19,0 22 39,0

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Dampers are designed for installation into air condition duct or at its ends.
Dampers are designated for installation in vertical or horizontal ducts. In the case of installation
in horizontal duct the blade axis has to be in horizontal position. Damper must be installed in a
way it opens in flow matching direction.

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LL…tightness of one blade, see diagram
N… number of blades
A... cross-section of the duct
Air-regenerated Noise
V [m/s] - air flow volume LWA [dB(A)] - total level of acoustic power
corrected by filter A
LW[dB/Okt.] - level of acoustic power in the
octave band
fm[Hz] - mean frequencies in the octave bands
2 30 33 35 34 32 25 <25 <25 35
3 40 43 42 39 38 33 25 <25 41
4 46 47 45 44 43 40 32 25 44
6 49 52 51 50 49 45 40 32 49
8 54 55 54 54 53 51 47 39 54
10 57 60 57 60 57 54 52 48 60

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Non-return damper
technical specifications
design according article 2.1.
dimension
type
Damper bodies and blades are supplied in the standard design made of galvanized plate without
any other surface finish.
Sliding bearings are made of resistant self-extinguishing nylon.
The appliance is constructed and preset by the manufacturer, its operation is dependent on
proper installation and adjustment.
Dampers are transported by box freight vehicles without direct weather impact, there must not
occur any sharp shocks and ambient temperature must not exceed +40°C. Dampers must be
protected against mechanic damages when transported and manipulated.
Dampers are stored indoor in environment without any aggressive vapours, gases or dust.
Indoortemperature must be in the range from -5°C to +40°C and maximum relative humidity 80%.
Dampers must be protected against mechanic damages when transported and manipulated.
Assembly consists of installing dampers in the ventilation duct system.
Non-return dampers are maintenance-free.

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