DUK

For connection to circular ducts

Connection to circular ducts

DUK

For installation into walls and onto rectangular and circular ducts, adjustable and fixed – made of aluminium

Adjustable and fixed jet nozzles achieve long throw distances under optimal acoustic conditions

Nominal sizes: 100, 125, 160, 200, 250, 315 and 400 mm
Volume flow rate range: 15 – 400 l/s or 54 – 1440 m³/h
Visible parts made of aluminium
For constant and variable volume flows
Low sound power levels due to aerodynamically optimised nozzle contours
Discharge angle can be adjusted manually or with an actuator
Quick, easy and concealed fixing

Optional equipment and accessories

Exposed surface in RAL CLASSIC colours
Circular spigot
Connection pieces for circular and rectangular ducts
Internal or external actuators for adjusting the discharge angle

Initialize order code

General information

Application

Type DUK jet nozzles for supply air discharge, with a long throw distance
For production halls, gymnasiums, theatres and conference rooms as well as for large internal spaces in airports, railway stations and shopping centres
Attractive design element for building owners and architects with demanding aesthetic requirements
For supply air to room air temperature differences from –12 to +20 K
Adjustable discharge angle, from –30 to +30°, for switching between heating and cooling mode
For push fitting directly onto circular ducts or as a branch off circular or rectangular ducts; also for installation into walls and bulkheads

Special characteristics

High discharge momentum, hence large penetration depth in heating mode
Optimised nozzle contours
Fixed and adjustable variants
Discharge angle can be adjusted from –30° to +30°, either manually or with an actuator
Electric actuator as an option

Nominal sizes

100, 125, 160, 200, 250, 315, 400 mm

From nominal size 160 with actuator

Variants

F: Fixed jet nozzle
V: Adjustable jet nozzle

Connection

V-A: For circular ducts (direct connection)
V-K: For rectangular ducts
V-R: For circular ducts

Actuator

Manual adjustment
E*: External electric actuator

Parts and characteristics

Nozzle with acoustically optimised contours

Useful additions

TDC temperature difference control module

Technical data

Nominal sizes: 100, 125, 160, 200, 250, 315, 400 mm
Volume flow rate range: 15 to 400 l/s or 54 to 1440 m³ /h
Adjustable discharge angle: –30 to +30°
Supply air to room air temperature difference: –12 to +20 K

Useful additions

TDC temperature difference control module

Standards and guidelines

Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

Maintenance-free, as construction and materials are not subject to wear and tear
Inspection and cleaning according to VDI 6022

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Schematic illustration of DUK-V for push fitting directly onto circular ducts

1 Nozzle
2 Face cover ring
3 Casing
4 Spigot

Optional
5 Actuator
6 driving linkage

DUK

Functional description

Jet nozzles are the preferred solution wherever the supply air has to travel large distances from the point of discharge to the occupied zone. It is possible to adapt the discharge angle, and consequently the direction of the airflow to heating or cooling mode. The supply air to room air temperature difference may range from –12 to +20 K.

Cooling mode

Cooling mode is possible with a positive discharge angle of up to 30°. The supply air jet is directed towards the ceiling, but the higher density of cold air results in an increasing deflection of the air jet towards the floor as the distance from the jet nozzle increases. When the supply air jet reaches the occupied zone, both the supply air to room air temperature difference and the airflow velocity have been reduced to comfortable levels.

This principle of operation allows for long throw distances.

Heating mode

Heating mode is possible with a negative discharge angle of –30° or less. The supply air jet is directed towards the occupied zone. Due to the lower density of warm air the jet becomes buoyant. When the supply air jet reaches the occupied zone, both the supply air to room air temperature difference and the airflow velocity should ideally have been reduced.

The discharge angle can be changed manually or with an electric actuator.

DUK-F

Functional description

Jet nozzles are the preferred solution wherever the supply air has to travel large distances from the point of discharge to the occupied zone. Fixed jet nozzles can be used for heating and cooling. The supply air to room air temperature difference can range from –12 to +20 K.

Cooling mode
The supply air is discharged horizontally, but the higher density of cold air results in an increasing deflection of the air jet towards the floor as the distance from the jet nozzle increases. When the supply air jet reaches the occupied zone, both the supply air to room air temperature difference and the airflow velocity have been reduced to comfortable levels.

Heating mode
The supply air is discharged horizontally, but due to the lower density of warm air the jet becomes buoyant. When the supply air jet reaches the occupied zone, both the supply air to room air temperature difference and the airflow velocity should ideally have been reduced.

Nominal sizes	100, 125, 160, 200, 250, 315, 400 mm
Volume flow rate range	15 – 400 l/s or 54 – 1440 m³/h
adjustable discharge angle	–30 to +30°
Supply air to room air temperature difference	–12 to +20 K

Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

Exact values for all parameters can be determined with our Easy Product Finder design program.

DUK-V, DUK-V-A, DUK-V-A-(E1, E2, E3), DUK-V-K, DUK-V-K-(E1, E2, E3), DUK-V-R, DUK-V-R-(E1, E2, E3), sound power level and total differential pressure

NS	Volume flow rate [l/s]	Volume flow rate [m³/h]	Δp_t [Pa]	L_WA [dB(A)]	v_L
					0.5 m/s	1.0 m/s
					L [m]
100	8	28	11	<15	<5	<5
100	15	54	38	<15	5	<5
100	20	72	68	<15	7	<5
100	30	108	152	30	10	5
125	15	54	13	<15	<5	<5
125	30	108	49	<15	8	<5
125	45	162	110	31	12	6
125	60	216	196	42	16	8
160	20	72	9	<15	<5	<5
160	40	144	36	<15	8	<5
160	60	216	81	19	13	6
160	80	288	144	30	17	8
200	35	126	10	<15	6	<5
200	70	252	37	<15	11	6
200	105	378	82	23	17	9
200	140	504	145	35	23	11
250	55	198	9	<15	7	<5
250	110	396	35	<15	14	7
250	165	594	77	22	21	11
250	220	792	137	34	28	14
315	90	324	9	<15	9	<5
315	185	666	37	<15	18	9
315	265	954	75	23	26	13
315	360	1296	137	35	>30	18
400	155	558	6	<15	12	6
400	310	1116	34	<15	24	12
400	465	1674	75	29	>30	18
400	620	2232	133	40	>30	24

All values apply to discharge angle 0°
L: Throw distance with isothermal operation

DUK-V-A-(E4, E5, E6), DUK-V-K-(E4, E5, E6), DUK-V-R-(E4, E5, E6), sound power level and total differential pressure

NS	Volume flow rate [l/s]	Volume flow rate [m³/h]	Δp_t [Pa]	L_WA [dB(A)]	v_L
					0.5 m/s	1.0 m/s
					L [m]
160	20	72	9	<15	<5	<5
160	40	144	36	18	8	<5
160	60	216	81	31	13	6
160	80	288	144	41	17	8
200	35	126	10	<15	6	<5
200	70	252	37	22	11	6
200	105	378	82	35	17	9
200	140	504	145	44	23	11
250	55	198	9	<15	7	<5
250	110	396	35	20	14	7
250	165	594	77	33	21	11
250	220	792	137	43	28	14
315	90	324	9	<15	9	<5
315	185	666	37	22	18	9
315	265	954	75	33	26	13
315	360	1296	137	43	>30	18
400	155	558	6	<15	12	6
400	310	1116	34	22	24	12
400	465	1674	75	35	>30	18
400	620	2232	133	44	>30	24

All values apply to discharge angle 0°
L: Throw distance with isothermal operation

DUK-F, sound power level and total differential pressure

NS	Volume flow rate [l/s]	Volume flow rate [m³/h]	Δp_t [Pa]	L_WA [dB(A)]	v_L
					0.5 m/s	1.0 m/s
					L [m]
100	8	28	6	<15	3	<5
100	15	54	33	<15	5	<5
100	20	72	61	<15	7	4
100	30	108	142	19	11	5
125	15	54	10	<15	4	<5
125	30	108	52	<15	9	<5
125	45	162	122	16	13	6
125	60	216	220	26	17	9
160	20	72	5	<15	4	<5
160	40	144	31	<15	9	<5
160	60	216	74	<15	13	7
160	80	288	134	20	17	9
200	35	126	6	<15	6	<5
200	70	252	33	<15	12	6
200	105	378	79	<15	17	9
200	140	504	143	24	23	12
250	55	198	6	<15	7	<5
250	110	396	34	<15	14	<5
250	165	594	80	18	22	11
250	220	792	145	28	29	14
315	90	324	6	<15	9	5
315	185	666	36	<15	19	10
315	265	954	77	22	27	14
315	360	1296	145	33	37	19
400	155	558	6	<15	12	6
400	310	1116	34	17	24	12
400	465	1674	81	30	35	18
400	620	2232	148	40	>30	24

L: Throw distance with isothermal operation

Fixed and adjustable jet nozzles for the ventilation of large internal spaces such as halls and assembly rooms. Air discharge with long throw distance under optimal acoustic conditions. For horizontal air discharge; variants with fixed discharge angle, adjustable air discharge (360°), or air discharge with nozzle that tilts between –30 and +30°.

Fixed nozzles with acoustically optimised contours and countersunk holes for screw-fixing to a plane surface

Adjustable jet nozzles include a spherical nozzle casing and a casing with a spigot, raised edge or saddle connector.

For push fitting directly onto circular ducts or as a junction off circular or rectangular ducts; also for installation on plane surfaces.

Special characteristics

High discharge momentum, hence large penetration depth in heating mode
Optimised nozzle contours
Fixed and adjustable variants
Discharge angle can be adjusted from –30° to +30°, either manually or with an actuator
Electric actuator as an option

Useful additions

TDC temperature difference control module

Technical data

Nominal sizes: 100, 125, 160, 200, 250, 315, 400 mm
Volume flow rate range: 15 – 400 l/s or 54 – 1440 m³/h
Adjustable discharge angle: –30 to +30°
Supply air to room air temperature difference: –12 to +20 K

Sizing data

q_v [m³/h]
Δp_t [Pa]

air-regenerated noise

L_WA [dB(A)]

DUK

–

250

630

P1 - RAL 9016

1 Type
DUK Jet nozzle

2 Discharge direction
F fixed
V adjustable

3 Connection
Applies to discharge direction V only
No entry: without spigot
A Pipe connection spigot (axial)
K Duct connection spigot
R Saddle connector

4 Adjustment
No entry: manual adjustment
From nominal size 160

External electric actuator
E1 230 V AC, 3-point
E2 24 V AC/DC, 3-point
E3 24 V AC/DC, modulating, 2 – 10 V DC

5 Nominal size [mm]
100, 125, 160, 200, 250, 315, 400

6 Circular duct diameter [mm]
Only for connection R
200 (nominal size 100)
250 (nominal size 125)
315 (nominal size 160)
500 (nominal sizes 160 – 315)
630 (from nominal size 160)
800 (from nominal size 160)

7 Exposed surface
No entry: without surface finish
P0 powder-coated, RAL 9010 (pure white)
P1 powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU 50
RAL 9006 GU 30
All other RAL colours GU 70

Order example: DUK-V-R-E1/250×630/P1-RAL9016

Type	DUK
Air discharge direction	adjustable
Connection	saddle connector
Adjustment	230 V AC, 3-point
Nominal size [mm]	250
Circular duct diameter [mm]	630
Exposed surface	Powder-coated, RAL 9016 (traffic white)

Variants, Product details

DUK-F

Fixed jet nozzle

Application

DUK-F

Application

DUK-V

Application

DUK-V-A

Designed for high comfort

Together with renowned designers and architects we have developed ceiling, wall, staircase and floor diffusers and grilles that are not only aesthetic design elements, but also meet demanding ventilation and acoustic requirements.

Application

DUK-V-K

Application

DUK-V-R

Installation on a plane surface

TJN, DUK-V

1 Plane surface

2 Jet nozzle

Ensure correct installation orientation
Installation directly onto circular ducts or as a junction off circular or rectangular ducts
DUK-F and DUK-V can also be installed on the face of plane surfaces, e.g. walls and bulkheads

The schematic diagrams are provided to illustrate installation details.

Product details

DUK-V front view

Product details

DUK-V

NS	ØD₁	ØD₂	A_eff [m²]
100	146	50	0.0019
125	169	64	0.0031
160	200	82	0.005
200	257	108	0.0085
250	302	136	0.0135
315	384	174	0.0225
400	467	230	0.0385

DUK-F

NS	ØD₁	ØD₂	A_eff [m²]
100	138	50	0.00174
125	161	64	0.00277
160	225	82	0.00469
200	265	108	0.00813
250	315	136	0.01289
315	400	174	0.0211
400	485	230	0.03683

Installation and commissioning

Ensure correct installation orientation
Installation directly onto circular ducts or as a junction off circular or rectangular ducts
DUK-F and DUK-V can also be installed on the face of plane surfaces, e.g. walls and bulkheads

The schematic diagrams are provided to illustrate installation details.

Downloads

product information

Product data sheet Actuators – Heating/Cooling

PD_2017_03_Heating_cooling_DE_en Product data sheet 670 KB pdf
Product data sheet Actuators – Modulating actuators

PD_2017_03_Variable_DE_en Product data sheet 430 KB pdf
Product data sheet DUK

DUK_PD_2024_06_05_DE_en Product data sheet 1,6 MB pdf

certificates

Declaration of hygiene conformity Type DUK

DUK_HC_2024_05_DE_en Hygiene certificate 1,7 MB pdf
Non-CE Manufacturer's statement DUK

DUK_NotCE_2022_02_08_14_27_06_DE_en Certificate 1,9 MB pdf

operation manuals

Installation manual

A00000070338 Type DUK 590 KB pdf

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For installation into walls and onto rectangular and circular ducts, adjustable and fixed – made of aluminium

General information

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

Variants, Product details

Product details

Product details

Downloads

product information

Product data sheet Actuators – Heating/Cooling

Product data sheet Actuators – Modulating actuators

Product data sheet DUK

certificates

Declaration of hygiene conformity Type DUK

Non-CE Manufacturer's statement DUK

operation manuals

Installation manual

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