Constant-/Variable Flow Dampers Constant-/Variable Flow Dampers

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lindab | constant-/variable flow dampers Constant-/variable flow dampers

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Constant- / variable flow dampers 14

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© 10.2011 Lindab Ventilation A/S. All forms of copying without written permission are forbidden. is Lindab AB’s registered trademark. 563 Lindab’s products, systems and product group and product designations are protected by intellectual property rights (IPR). lindab | constant-/variable flow dampers Constant-/variable flow dampers

Constant-/variable flow dampers 1 Product Functions Page

2 DAU 567

3 DA2EU 568

4 DAVU 569 5

Technical data 570 6

Right to alterations reserved Right to alterations reserved 564 lindab | constant-/variable flow dampers Constant-/variable flow dampers

11 DAU, air flow regulator Lindabs constant-/variable Functions flow dampers 12

In many instances it will be necessary to maintain a con- DAU is a mechanical constant flow damper which auto- stant air flow in a room, a zone etc. In normal ventilation matically sustains a given air flow, that is manually set on 13 units, pressure variations usually for one reason or another the regulation handle. DA2EU has a mounted electrical makes it necessary to regulate the air duct system, in motor, which is able to switch between two previously order to achieve the desired air flow in the right room. chosen air volumes/flows. 14 DAVU has a mounted electrical motor so that a modulat- In a proportional ventilation system, the slightest pressure ing regulation is possible within the full scale. variation will influence the air flow coming into the room. 15 Requirements of minimum air volume/flow in individ- ual rooms, in order to comply with public authority requirements or law requirements are often in place. 16

With Lindabs series of mechanical constant-/variable flow dampers, the desired air volume/flow is ensured, despite 17 the variety of pressure in the ventilation system itself.

DAU, mechanical constant flow damper 18 with manual setting of one flow

Right to alterations reserved Right to alterations reserved 565 lindab | constant-/variable flow dampers Constant-/variable DAU, flow dampers DA2EU, DAVU

Summary Disturbance tolerance 1 • DAU - manual single flow unit In order to achieve the stated accuracy for the pre-set • DA2EU - motorized twin flow unit flow a straight distance of at least 3×d before and at least • DAVU - motorized variable flow unit 1,5×d after the units are required. A mounting close to a 2 • Diameters Ø 80–315 source of disturbance (bend, saddle etc.) decreases the • Flow range 15–830 l/s (54–2988 m³/h) regulation accuracy and the flow may deverge from the • Pressure range 50–1000 Pa (over the unit) set value. 3 • Independent of mounting direction • Handles 50 mm duct insulation Change of direction The units are independent of their mounting direction and Function one may deviate from the specified direction and mount 4 The constant flow damper is an automatic damper, which them in any direction without affecting the accuracy. at varying pressures wholly mechanical and independent of external energy sources maintains a set flow constant. Combinations 5 The force, needed for regulation, is taken from the passing The units can be mounted together with e.g. a motorized air stream. The air stream across the blade attempts to shut off damper DTBU, see page side 276. Constant flow close it and generates a closing torque. This is balanced damper combined with shut off damper can with advan- 6 by an opposed opening force from a spring. The greater tage be used in groups at installations where you want: the pressure across the blade the more it closes. A bellow eliminates oscillations, which could occur at unfavourable • two flows, that lies too far away from each other for 7 conditions of operation. a two flow unit to handle

Types or 8 The following types exists: • DAU – one flow unit – with knob and arrow for man- • more than two flows ual setting of one flow. 9 • DA2EU – two flows unit – with electric motor for Presume: Basic flow = 80 l/s switching between two flows. Forced flow 1 = 100 l/s • DAVU – variable flow unit – with electric motor for Forced flow 2 = 150 l/s continuous setting of one flow. 10 Four flows will then be posssible: Material Housing and damper blade are of galvanized sheet metal 80, 180, 230 and 330 l/s. 11 and shaft is of stainless steel.

Temperature 12 Working range: +5 to +70 °C.

Insulation The units can handle 50 mm duct insulation without the 13 BasicGroundflow flow scale or the motor being hidden. DAU is available with an 45 mm external insulation and ForcedForced flow flow 1 1 14 an outer sheet metal shell for lower sound radiation to the ForcedForced flow flow 2 2 surroundings. Is then called DALU.

15 Regulating accuracy The units are calibrated from factory within their whole working range. In this the units keep the flow constant 16 within approximately ±5 to ±10% of the set flow. Greater deviations occur at the lower flows, aspecially for small sizes.

17 Flow setting The units can not be delivered from factory with a preset flow. You can set the flow yourself very easy following to 18 the instruction for each product.

Right to alterations reserved 566 lindab | constant- / variable flow dampers Constant- / variable flow dampers DAU

Dimensions 1

B 2 122

65 3 1 Ød 4 l 5

Description Tightness class 6 Constant flow damper with manual setting of one flow Ød1 l B m across closed nom mm mm kg blade DAU is a constant flow damper, which facilitates balancing 80 240 122 1,35 0 7 of ventilation systems and gives correct flow from the start. 100 240 122 1,40 0 The unit compensates for e.g. connection and disconnec- 125 240 135 1,65 0 tion of system parts, clogging of filters and ducts, thermal lift 8 forces, wind effects, window opening etc. 160 250 170 1,85 0 200 268 210 2,26 0 Ø 80–315 fullfills pressure class A in closed position. 250 290 260 3,35 0 9 Fulfils tightness class C. 315 332 325 4,75 0 There is a separate assembly, measuring, balancing and DAU is available with an 45 mm external insulation and an maintenance instruction for this product. outer sheet metal shell for lower sound radiation to the sur- 10 roundings. Is then called DALU. Technical data 122 Flow setting 11 The flow is set by loosing the center nut and via the knob 20 turning the scale arrow so it points at the wanted flow on the scale. Then the center nut is tightened. 12

B l 13

Tightness class 14 Center nut Ød1 l B m across closed nom mm mm kg blade Scale arrow 80 240 170 2,35 0 100 240 190 2,50 0 15 125 240 215 2,90 0 160 250 250 3,45 0 16 200 268 290 4,06 0 250 290 340 6,05 0 315 332 405 8,60 0 17 Order code DAU aaa Product 18 Dimension Ød1

We reserve the right to make changes without prior notice 567 lindab | constant- / variable flow dampers Constant-/variable flow damper DA2EU

Dimensions 1

B 2 130 3 1

4 Ød

l 5

6 Description Tightness class Constant flow damper with electric motor for switching Ød1 l B m across closed between two flows nom mm mm kg blade 7 DA2EU is a constant flow damper, which facilitates 80 250 122 1,95 0 balancing of ventilation systems and gives correct flow from 100 250 122 2,00 0 the start. The unit compensates for e.g. connection and 125 250 135 2,25 0 8 disconnection of system parts, clogging of filters and ducts, thermal lift forces, wind effects, window opening etc. The 160 250 170 2,45 0 motors shall be completed with a switch. The switch can in 200 250 210 2,86 0 turn be controlled either manually with timer, with on/off- 250 290 260 3,95 0 9 thermostat, with attendance transmitter or similar. 315 332 325 5,35 0 Ø 80–315 fullfills pressure class A in closed position. Fulfils tightness class C. 10 There is a separate assembly, measuring, balancing and maintenance instruction for this product. Order code DA2EU aaa 24 LM Flow setting 11 Product The two flows are set Dimension Ød1 by moving the end Voltage

stoppers screws. 0 End stop screws BELIMO R Motor type 12 Made in Switzerland At delivery the LM230A 1 screws are set at largest possible 13 distance.

14 Technical data for the motors

LM 24 A LM 230 A Power supply...... AC 19,2–28,8 V, 50/60 Hz AC 85–265 V, 50/60 Hz 15 DC 19,2–28,8 V Power consumption ...... 1 W 1,5 W – + – + For wire sizing ...... 2 VA 4 VA Connection...... Cable 1 m, 3×0,75 mm2 Cable 1 m, 3×0,75 mm2 16 Operating angle...... Max. 95°, adjustable 0–100% Max. 95°, adjustable 0–100% 0 Torque at rated voltage ...... Min. 5 Nm Min. 5 Nm Direction of rotation...... Switch selectable Switch selectable 1 23 1 2 3 0 or 1 0 or 1 17 Position indication...... Mechanical Mechanical Running time for 95° ...... 150 s 150 s Sound power level...... Max. 35 dB (A) Max. 35 dB (A) 0 0 Protection class...... III Safety extra-low voltage II Safety insulated 18 Protection type...... IP 54 IP 54 1 1 Ambient temperature range ...... -30 to +50°C -30 to +50°C Ambient moisture ...... 95 % RH 95 % RH

568 We reserve the right to make changes without prior notice lindab | constant- / variable flow dampers Constant- / variable flow damperDAVU

Dimensions 1

B 2 130 3 1

Ød 4

l 5

Description Tightness class 6 Ød l B m Constant flow damper with electric motor for continuous 1 across closed nom mm mm kg setting of one flow blade DAVU is a constant flow damper, which facilitates balancing 80 250 122 1,95 0 7 of ventilation systems and gives correct flow from the start. 100 250 122 2,00 0 The unit compensates for e.g. connection and disconnection 125 250 135 2,25 0 of system parts, clogging of filters and ducts, thermal lift 160 250 170 2,45 0 8 forces, wind effects, window opening etc. 200 250 210 2,86 0 250 290 260 3,95 0 The motor shall be completed with control signal transmitter 9 e.g. an external potentiometer or a proportionally regulating 315 332 325 5,35 0 thermostat. 10 A special mounting, measuring, balancing and maintenance Order code instruction exists for this product. Product DAVU aaa 24 LMSX Ø 80–315 fullfills pressure class A in closed position. Type 11 Fulfils tightness class C. Dimension Ød1 Voltage Motor type 12

13 Technical data for the motors

LM 24 A-SX 14 Power supply...... AC 19,2–28,8 V, 50/60 Hz DC 21,6–28,8 V Power consumption...... 2 W For wire sizing ...... 4 VA – + 15 2 Connection ...... Cable 1 m, 4×0,75 mm Y DC 0–10 V Operating angle...... Max. 95°, adjustable 0–100 % U DC 2–10 V Torque at nominal voltage...... Min. 5 Nm Direction of rotation ...... Switch selectable 0/1 16 Position at Y=0 V...... Switch selectable 0 or 1 1 235 Position indication...... Mechanical Running time for 90° ...... 150 s Sound power level...... 35 dB (A) 17 Protection class ...... III Safety extra-low voltage Protection type...... IP 54 Ambient temperature range...... -30 to +50 °C Ambient humidity...... 95 % RH 18

We reserve the right to make changes without prior notice 569 lindab | constant- / variable flow dampers Technical data DAU, DA2EU, DAVU

Technical data 1 Pressure and flow ranges and sound to duct

2 Ø 100 v 5 10 [Pa] [m/s] 1000 The graphs show A-weighted sound power level, LWA [dB], 65 [dB] 3 to duct. These curvs are intended for brief comparision. For 60 more accurate calculation, please use the tables. 900 LWA Example 800 4 Given: Diameter 125 mm Flow 70 l/s 700

Pressure drop 200 Pa t 600

p 55 5 The graph gives: Δ A-weighted sound 500 power level approx. 57 dB The table gives: 400 6 Sound power level as below 50 300

200 45 7 Centre fre- 40 quency [Hz] 63 125 250 500 1 k 2 k 4 k 8 k 100 50 20 30 40 50 60 70 80 90 95 [l/s] 8 Sound power 52 52 49 49 49 51 51 46 level [dB] 100 150 200 250 300 [m³/h] q 9 Ø 125 Ø 80 v v 5 10 [m/s] 5 10 [m/s] [Pa] [Pa] 10 1000 1000 LWA 75 [dB] 900 900 65 70 60 65 [dB] 55 LWA 11 800 800 700 700

t 600 p 600 p 12 Δ Δ 500 500 60 50 13 400 400 300 300 55 45 14 200 200 50 40 100 100 45 50 50 15 15 20 30 40 50 60 70 [l/s] 40 50 60 70 80 90 100 125 150 165 [l/s] 100 150 200 250 [m³/h] 200 300400 500 [m³/h] q q 16

570 We reserve the right to make changes without prior notice lindab | constant- / variable flow dampers Technical data DAU, DA2EU, DAVU

Technical data Pressure and flow ranges and sound to duct 1

Ø 160 v Ø 250 v 5 10 [m/s] 5 10 [m/s] 2 [Pa] [Pa] 1000 1000 75 [dB] 75 [dB] 900 900 3 70 70 LWA LWA 800 800 65 700 700 4

p t 600 600 Δ p Δ 65 500 500 5 60 400 400 60 300 300 6 55 200 200 55 50 50 100 100 7 45 50 50 40 50 75 100 125 150 175 200 220 [l/s] 110 200 300 400 500 600 [l/s]

200 300 400 500 600 700 [m³/h] 400 600 800 1000 1500 2000 [m³/h] 8 q q Ø 200 v Ø 315 v 9 5 10 [m/s] 5 10 [Pa] [Pa] [m/s] 1000 1000 75 [dB] 10 900 75 [dB] 900

70 LWA LWA 800 800 70 11 700 700

600 600 t 65

p 12 Δ

500 t 500

p 65 Δ 400 400 60 13 300 300 60 200 55 200 55 14 50 50 100 100 45 45 50 50 70 100 150 200 250 300 350 [l/s] 200 300 400 500 600 700 800 [l/s] 15 300 400 600 800 1000 1200 [m³/h] 1000 1500 2000 2500 [m³/h] q q 16

We reserve the right to make changes without prior notice 571 lindab | constant- / variable flow dampers Technical data DAU, DA2EU, DAVU

Technical data 1 Sound to duct

Sound power level, LW [dB], to duct in octave bands 1–8, 2 63–8000 Hz, as function of diameter, pressure drop and flow.

Velocity app. 2,5 [m/s] Velocity app. 6 [m/s] 3 Pressure Ød1 drop Centre frequency [Hz] Centre frequency [Hz] [Pa] 4 63 125 250 500 1k 2k 4k 8k 63 125 250 500 1k 2k 4k 8k flow 15 [l/s] flow 30 [l/s] 1000 51 49 44 44 46 49 49 44 56 56 53 53 53 55 55 50 5 500 45 43 38 38 40 43 43 38 51 51 49 49 49 51 50 46 80 200 37 35 30 30 32 35 35 30 45 45 43 43 43 45 44 40 100 32 30 25 25 27 30 30 25 41 41 39 39 39 41 40 35 6 50 26 24 19 19 21 24 24 19 –––––––– flow 20 [l/s] flow 45 [l/s] 1000 56 53 48 48 50 53 54 48 59 59 57 57 57 59 58 53 7 500 49 46 41 41 43 47 47 42 54 54 51 51 51 53 53 48 100 200 39 37 31 31 33 37 37 32 47 47 44 44 45 47 46 41 100 34 31 26 26 28 32 32 27 42 42 39 39 40 42 41 36 50 26 24 18 18 20 24 24 19 –––––––– 8 flow 30 [l/s] flow 70 [l/s] 1000 60 58 52 52 54 58 58 53 64 64 62 62 62 64 63 59 500 54 52 46 46 48 52 52 47 59 59 56 57 57 59 58 53 9 125 200 46 44 38 38 40 44 44 39 52 52 49 49 49 51 51 46 100 40 38 32 32 34 38 38 33 46 46 44 44 44 46 45 40 50 34 32 26 26 28 32 32 27 –––––––– 10 flow 40 [l/s] flow 120 [l/s] 1000 62 59 52 52 55 59 60 54 67 67 65 65 65 67 66 61 500 56 53 47 47 49 53 54 48 61 61 59 59 59 61 60 55 160 200 49 46 39 39 42 46 47 41 53 53 51 51 51 53 52 47 11 100 43 40 33 33 36 40 41 35 48 48 46 46 46 48 47 42 50 37 34 27 27 30 34 35 29 –––––––– 12 flow 70 [l/s] flow 180 [l/s] 1000 66 63 57 57 59 63 63 58 69 69 66 66 66 68 68 63 500 59 56 50 50 53 57 57 52 62 62 60 60 60 62 61 57 200 200 50 47 41 41 43 47 47 42 54 54 51 51 52 54 53 48 13 100 43 40 34 34 36 40 40 35 47 47 45 45 45 47 46 42 50 37 34 28 28 30 34 34 29 –––––––– flow 110 [l/s] flow 300 [l/s] 14 1000 67 64 59 59 61 65 65 60 70 70 67 68 67 69 69 64 500 60 57 51 51 53 57 57 52 63 63 61 61 61 63 62 57 250 200 50 47 41 41 43 47 47 42 55 55 53 53 53 54 54 49 100 43 40 34 34 36 40 40 35 49 49 47 47 47 48 48 43 15 50 35 32 26 26 28 32 33 27 43 43 40 41 40 42 42 37 flow 170 [l/s] flow 470 [l/s] 16 1000 69 66 60 60 62 66 67 61 70 70 68 68 68 70 69 65 500 61 58 52 52 54 58 59 53 64 64 62 62 62 64 63 59 315 200 50 47 41 41 44 48 48 43 56 56 54 54 54 56 55 50 100 42 40 34 34 36 40 40 35 50 50 47 47 47 49 49 44 17 50 35 32 26 26 29 33 33 28 ––––––––

572 We reserve the right to make changes without prior notice lindab | constant- / variable flow dampers Technical data DAU, DA2EU, DAVU

Technical data Sound to duct 1

Sound power level, LW [dB], to duct in octave bands 1–8, 63–8000 Hz, as function of diameter, pressure drop and flow. 2

Velocity app. 9 [m/s] Velocity app. 12 [m/s] 3 Pressure Ød1 drop Centre frequency [Hz] Centre frequency [Hz] [Pa] 63 125 250 500 1k 2k 4k 8k 63 125 250 500 1k 2k 4k 8k 4 flow 45 [l/s] flow 70 [l/s] 1000 58 59 59 59 58 59 58 53 61 64 65 65 63 63 61 57 500 55 56 55 55 54 55 54 50 59 61 62 62 60 60 59 55 5 80 200 50 51 51 51 50 51 50 45 55 58 59 59 57 57 55 51 100 –––––––– –––––––– 50 –––––––– –––––––– 6 flow 70 [l/s] flow 95 [l/s] 1000 61 62 61 62 61 62 61 56 62 64 65 65 63 63 62 58 500 56 58 57 57 56 57 56 51 59 60 61 61 59 60 58 54 7 100 200 51 52 51 51 50 51 50 46 53 55 56 56 54 54 53 49 100 47 48 47 47 46 47 46 42 –––––––– 50 –––––––– –––––––– 8 flow 110 [l/s] flow 165 [l/s] 1000 66 67 67 67 66 67 66 61 68 71 71 72 70 70 68 64 500 61 62 62 62 61 62 61 56 63 66 66 67 65 65 63 59 125 200 54 55 55 55 54 55 54 49 57 59 60 60 58 58 57 52 9 100 50 51 50 50 49 50 49 45 –––––––– 50 –––––––– –––––––– flow 180 [l/s] flow 220 [l/s] 10 1000 69 70 69 69 68 69 68 64 70 71 71 71 70 71 69 65 500 63 64 63 63 62 63 62 58 64 66 66 66 64 65 64 59 160 200 55 56 56 56 55 56 55 50 56 58 58 58 57 57 56 52 11 100 50 51 50 50 49 50 49 45 51 52 52 52 51 52 50 46 50 –––––––– –––––––– flow 280 [l/s] flow 360 [l/s] 12 1000 70 71 71 71 70 71 70 65 71 73 73 73 72 72 71 67 500 64 65 64 64 63 64 63 59 65 67 67 67 65 66 65 60 200 200 56 57 56 56 55 56 55 51 57 58 59 59 57 58 56 52 100 50 51 50 50 49 50 49 45 51 53 53 53 52 52 51 47 13 50 –––––––– –––––––– flow 450 [l/s] flow 600 [l/s] 14 1000 71 72 71 71 70 71 70 66 72 73 74 74 72 73 71 67 500 65 66 65 65 64 65 64 60 66 68 69 69 67 67 66 62 250 200 57 58 57 57 56 57 56 52 58 60 61 61 59 59 58 54 100 51 52 52 52 51 52 51 46 54 55 56 56 54 55 53 49 50 –––––––– –––––––– 15 flow 700 [l/s] flow 830 [l/s] 1000 71 72 72 72 71 72 71 66 72 73 73 73 72 73 71 67 16 500 66 67 66 66 65 66 65 61 66 67 67 68 66 67 66 61 315 200 58 59 59 59 58 59 58 53 59 60 60 60 59 60 58 54 100 52 53 53 53 52 53 52 47 –––––––– 50 –––––––– –––––––– 17

We reserve the right to make changes without prior notice 573 lindab | constant- / variable flow dampers Technical data DAU, DA2EU, DAVU

Technical data 1 Pressure and flow ranges and sound to the surroundings 2

3 Ø 100 v 5 10 [Pa] [m/s] The graphs show A-weighted sound power level, LWA [dB], 1000 4 to the surroundings. 55 [dB] 50 Example: 900 45

Given: Diameter 125 mm 40 LWA 5 Flow 70 l/s 800 Pressure drop 200 Pa The graph gives: 700 A-weighted sound 600

6 power level approx. 40 dB t p Δ 500 35 The A-weighted sound pressure level in the middle of the 7 room becomes approx. 8 dB lower than these graph values. 400 30 With insulation shell around the unit (the DALU unit) the A- 300 weighted sound pressure level in the middle of the room 8 becomes appox. 26 dB lower than the graph values on con- 200 25 dition that also the connected ducts are attenuated (insu- 20 100 lated) to the same extent. 50 9 20 30 40 50 60 70 80 90 95 [l/s] Still lower sound pressure level can be achieved with addi- tional constructional sound attension measures (false ceil- 100 150200 250 300 [m³/h] ing, high room attenuation). q 10 Ø 80 v Ø 125 v 5 10 5 10 [Pa] [m/s] [Pa] [m/s] 11 1000 1000 45 55 [dB] 900 55 [dB] 900 50 50 LWA L 12 800 40 800 WA

700 700 35 45

13 t t 600 600 p p Δ Δ 500 500 14 400 400 40 30 300 300 15 200 200 35 25 30 100 20 100 50 50 25 16 15 20 30 40 50 60 70 [l/s] 40 50 60 70 80 90 100 150 165 [l/s]

100 150200 250 [m³/h] 200 300400 500 [m³/h] 17 q q

574 We reserve the right to make changes without prior notice lindab | constant- / variable flow dampers Technical data DAU, DA2EU, DAVU

Technical data Pressure and flow ranges and sound 1 to the surroundings 2

3 Ø 160 v Ø 250 v [Pa] 5 10 [m/s] [Pa] 5 10 [m/s] 1000 1000 4 55 60 [dB] 60 65 [dB] 900 900 L WA LWA 800 800 5 55 700 50 700

600 600 6 t

t p p Δ Δ 500 500 50 400 45 400 7

300 300 45 200 40 200 8 40 100 35 100 35 50 30 50 30 40 50 75 100 125 150 175 200 220 [l/s] 110 200 300 400 500 600 [l/s] 9

200 300 400 500 600 700 [m³/h] 400 600 800 1000 1500 2000 [m³/h] q q 10

Ø 200 v Ø 315 v [m/s] 5 10 [m/s] [Pa] 5 10 [Pa] 11 1000 1000 60 [dB] 65 [dB] 900 900 60 L L 12 800 55 WA 800 WA

700 700 55 13

600 t 600 p 50 p Δ Δ 500 500 14 400 400 50 45 300 300 45 15 200 40 200 40 100 35 100 35 50 50 16 70 100 150 200 250 300 350 [l/s] 200 300 400 500 600 700 800 [l/s]

300 400 600 800 1000 1200 [m³/h] 1000 1500 2000 2500 [m³/h] q q 17

We reserve the right to make changes without prior notice 575