DUK

DUK-V

DUK-F

Fixed jet nozzle

DUK-V

Adjustable jet nozzle

Connection to circular ducts

Actuator

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 and have excellent acoustic properties

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

Application

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

Description

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*: Internal or external electric actuator

Parts and characteristics

Nozzle with acoustically optimised contours

Useful additions

TDC temperature difference control module

Construction features

Spigot (optional) suitable for circular ducts to EN 1506 or EN 13180.

Materials and surfaces

Fixed

Nozzle made of aluminium
Untreated surface

Adjustable

Nozzle and face cover ring made of aluminium
Spherical nozzle casing ring, casing, saddle connector and spigot made of galvanised sheet steel
Spherical nozzle casing made of plastic, UL 94, V-0, flame retardant, heat resistant up to 50 °C
Nozzle and face cover ring untreated
Spherical nozzle casing similar to RAL 9010, white
P0: Nozzle and face cover ring powder-coated RAL 9010, pure white
P1: Nozzle and face cover ring powder-coated, RAL CLASSIC colour

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
Inspection and cleaning 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 Linkage

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.

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 programme.

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

Nominal size	Volume flow rate		Δp_t	L_WA	v_L
Nominal size	Volume flow rate		Δp_t	L_WA	0.5 m/s	1.0 m/s
Nominal size	Volume flow rate		Δp_t	L_WA	L
Nominal size	l/s	m³/h	Pa	dB(A)	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

Nominal size	Volume flow rate		Δp_t	L_WA	v_L
Nominal size	Volume flow rate		Δp_t	L_WA	0.5 m/s	1.0 m/s
Nominal size	Volume flow rate		Δp_t	L_WA	L
Nominal size	l/s	m³/h	Pa	dB(A)	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

Nominal size	Volume flow rate		Δp_t	L_WA	v_L
Nominal size	Volume flow rate		Δp_t	L_WA	0.5 m/s	1.0 m/s
Nominal size	Volume flow rate		Δp_t	L_WA	L
Nominal size	l/s	m³/h	Pa	dB(A)	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, excellent acoustic properties. 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 have an additional spherical casing and a casing with a spigot, raised edges or saddle connector.

For push fitting directly onto circular ducts or as a branch 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

Materials and surfaces

Fixed

Nozzle made of aluminium
Untreated surface

Adjustable

Nozzle and face cover ring made of aluminium
Spherical nozzle casing ring, casing, saddle connector and spigot made of galvanised sheet steel
Spherical nozzle casing made of plastic, UL 94, V-0, flame retardant, heat resistant up to 50 °C
Nozzle and face cover ring untreated
Spherical nozzle casing similar to RAL 9010, white
P0: Nozzle and face cover ring powder-coated RAL 9010, pure white
P1: Nozzle and face cover ring powder-coated, RAL CLASSIC colour

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

Sizing data

V _______________________ [m³/h]
Δp_t _______________________ [Pa]

Air-regenerated noise

L_WA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

Type
DUK Jet nozzle

Discharge direction
F Fixed
V Adjustable

Connection
       Only for variant V
       No entry: without spigot
A       Spigot to fit onto the end of circular ducts
K       Spigot to fit onto rectangular ducts
R       Saddle connector, specify duct diameter under

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
       Internal electric actuator
E4       230 V AC, 3-point
E5       24 V AC, 3-point

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

Circular duct diameter [mm]
Specify only for variant -R
200       Only for nominal size 100
250       Only for nominal size 125
315       Only for nominal size 160
500       Only for nominal sizes 160 –315
630       From nominal size 160
800       From nominal size 160

Exposed surface
       No entry: untreated
P0       Powder-coated RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

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

Order example: DUK-V-K-E1/250/P1 – RAL 9016

Discharge direction	Adjustable
Connection	Spigot to fit onto rectangular ducts
Adjustment	230 V AC
Nominal size	250 mm
Exposed surface	White aluminium, similar to RAL 9006

Order example: DUK-F/250

Discharge direction	Fixed
Nominal size	250 mm

Variants, Dimensions and weight

DUK-F

Fixed jet nozzle

DUK-V

Variant

Adjustable jet nozzle for wall and bulkhead installation

Nominal sizes

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

Parts and characteristics

Nozzle with acoustically optimised contours
Nozzle can be manually rotated inside the spherical casing by 360°
Screw fixing concealed by face cover ring

DUK-V-A

Variant

Adjustable jet nozzle for the connection to circular ducts

Nominal sizes

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

From nominal size 160 with actuator

Parts and characteristics

Nozzle with acoustically optimised contours
Nozzle can be manually rotated inside the spherical casing by 360°
Screw fixing concealed by face cover ring
Casing and spigot
The discharge angle can be adjusted from –30° to +30° with an electric actuator (optional)
E1, E2, E3: External actuator
E4, E5, E6: Internal actuator with spindle

Construction features

Spigot suitable for circular ducts to EN 1506 or EN 13180

DUK-V-K

Variant

Adjustable jet nozzle for the connection to rectangular ducts

Nominal sizes

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

From nominal size 160 with actuator

Parts and characteristics

Nozzle with acoustically optimised contours
Nozzle can be manually rotated inside the spherical casing by 360°
Screw fixing concealed by face cover ring
Casing with raised edges
The discharge angle can be adjusted from –30° to +30° with an electric actuator (optional)
E1, E2, E3: External actuator
E4, E5, E6: Internal actuator with spindle

DUK-V-R

Variant

Adjustable jet nozzle for the connection to circular ducts

Nominal sizes

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

From nominal size 160 with actuator

Parts and characteristics

Nozzle with acoustically optimised contours
Nozzle can be manually rotated inside the spherical casing by 360°
Screw fixing concealed by face cover ring
Casing and saddle connector
The discharge angle can be adjusted from –30° to +30° with an electric actuator (optional)
E1, E2, E3: External actuator
E4, E5, E6: Internal actuator with spindle

DUK-F

Variant

Fixed jet nozzle

Nominal sizes

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

Parts and characteristics

Nozzle with acoustically optimised contours
Countersunk holes for screw-fixing the nozzle to a plane surface

DUK-V

DUK-V

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD mm	m kg
100	146	11	76	98	0.4
125	169	11	85	123	0.5
160	200	11	94	158	0.8
200	257	16	110	198	1.4
250	302	16	146	248	2.5
315	384	23	153	313	4.0
400	467	24	177	398	6.0

DUK-V-A

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD₃ mm	ØD mm	C mm	m kg
100	146	11	84	134	98	50	0.8
125	169	11	94	157	123	50	1.0
160	200	11	114	188	158	50	1.6
200	257	16	143	242	198	50	2.5
250	302	16	172	287	248	50	4.0
315	384	23	223	358	313	50	6.0
400	467	24	262	441	398	50	9.0

DUK-V-A-E*

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD₃ mm	ØD mm	C mm	m kg
160	200	11	365	188	158	50	3.0
200	257	16	365	242	198	50	4.0
250	302	16	365	287	248	50	5.5
315	384	23	365	358	313	50	7.5
400	467	24	365	441	398	50	10.2

DUK-V-K

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD₃ mm	C mm	m kg
100	146	11	84	134	50	0.8
125	169	11	94	157	50	1.0
160	200	11	114	188	50	1.5
200	257	16	143	242	50	2.3
250	302	16	172	287	50	4.0
315	384	23	223	358	50	6.0
400	467	24	262	441	50	9.0

DUK-V-K-E*

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD₃ mm	C mm	m kg
160	200	11	365	188	50	3.0
200	257	16	365	242	50	4.0
250	302	16	365	287	50	5.5
315	384	23	365	358	50	7.5
400	467	24	365	441	50	10.0

DUK-V-R

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD₃ mm	C mm	m kg
100	146	11	84	134	50	0.7
125	169	11	94	157	50	0.9
160	200	11	114	188	50	1.3
200	257	16	143	242	50	2.2
250	302	16	172	287	50	3.7
315	384	23	223	358	50	5.9
400	467	24	262	441	50	8.7

DUK-V-R-E*

Nominal size	ØD₁ mm	L₁ mm	L₂ mm	ØD₃ mm	C mm	m kg
160	200	11	365	188	50	3.2
200	257	16	365	242	50	4.4
250	302	16	365	287	50	5.7
315	384	23	365	358	50	8.0
400	467	24	365	441	50	11.5

Circular duct diameter ØD5 [mm]

Nominal size	200	250	315	500	630	800
100	+
125		+
160			+	+	+	+
200				+	+	+
250				+	+	+
315				+	+	+
400					+	+

DUK-F

Nominal size	ØD₁ mm	L₁ mm	m kg
100	138	94	0.1
125	161	112	0.1
160	225	122	0.2
200	265	153	0.3
250	315	187	0.4
315	400	224	0.6
400	485	287	0.9

DUK-V front view

DUK-V

Nominal size	ØD₁ mm	ØD₂ mm	A_eff m²
100	146	50	0.00190
125	169	64	0.00310
160	200	82	0.00500
200	257	108	0.00850
250	302	136	0.01350
315	384	174	0.02250
400	467	230	0.03850

DUK-F

Nominal size	ØD₁ mm	ØD₂ mm	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	0.02110
400	485	230	0.03683

Installation details, Basic information and nomenclature

Installation onto a plane surface

① Plane surface
② Jet nozzle

No duct connection
Screw fix the spherical nozzle casing to the installation surface
Attach the face cover ring

TJN, DUK-V

Installation and commissioning

Ensure correct installation orientation
Installation directly onto circular ducts or as a branch 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

These are only schematic diagrams to illustrate installation details.

Principal dimensions

ØD₁ [mm]

Outer diameter of the face cover ring

ØD₂ [mm]

Smallest nozzle diameter (at the discharge opening)

ØD₃ [mm]

Diameter of the nozzle casing

ØD₄ [mm]

Nominal width of the circular duct, for nozzles with saddle connector

L₁ [mm]

Length of the face cover ring

L₂ [mm]

Casing length

m [kg]

Weight

Nomenclature

L_WA [dB(A)]

Sound power level of the air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δt_z [K]

Supply air to room air temperature difference

Δp_t [Pa]

Total differential pressure

v_L [m/s]

Air velocity at throw distance L (measured at the centre of the airflow)

L [m]

Throw distance with isothermal operation, no throw distance reduction

A_eff [m²]

Effective air discharge area

All sound power levels are based on 1 pW.

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 Type DUK

Product data sheet 3,4 MB pdf

certificates

Declaration of hygiene conformity Type DUK

DUK_HC_2020_06_08_DE_en Hygiene certificate 1,8 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

Application

Description

Technical information

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

Variants, Dimensions and weight

Installation details, Basic information and nomenclature

Downloads

product information

Product data sheet Actuators – Heating/Cooling

Product data sheet Actuators – Modulating actuators

Product data sheet Type DUK

certificates

Declaration of hygiene conformity Type DUK

Non-CE Manufacturer's statement DUK

operation manuals

Installation manual

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

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