TVLK

Variant with nozzle and connecting circular spigot

TVLK

Optimised for use in laboratories and on fume cupboards

Plastic circular VAV terminal units for aggressive extract air in laboratories and production facilities

Casing and damper blade made of flame-resistant polypropylene
Compact construction, only 400 mm long
High control accuracy even in case of unfavourable upstream conditions
Combination with fast-running actuators (air management systems)
Volume flow rate measurement with bluff body or nozzle
Slide-out sensor tubes allow for easy cleaning
Closed blade air leakage to EN 1751, class 4
Casing air leakage to EN 1751, class C

Optional equipment and accessories

With flanges on both ends
Plastic secondary silencer Type CAK for the reduction of air-regenerated noise

General information

Application

Circular VAV terminal units for use in ventilation and air conditioning systems
Terminal unit made of plastic for controlling the volume flow rate of fume cupboards and fume hoods in labs
Suitable for contaminated air
Closed-loop volume flow control using an external power supply
For variable and constant volume flows
Shut-off by means of switching (equipment supplied by others)

Special features

High control accuracy even in case of unfavourable upstream conditions
Integral effective pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
Construction with bluff body: Slide-out sensor tubes allow for easy inspection and cleaning
No metal parts come into contact with the airflow
Factory set-up or programming and aerodynamic function testing
Configuration and subsequent parameter setting for the control component can be done with the EasyConnect configuration software

Nominal sizes

Bluff body: 250 – 100, 250 – 160
Nozzle: 250 – D08, 250 – D10, 250 – D16
Bluff body available in 2 sizes and nozzle available in 3 sizes for various volume flow rate ranges

Variants

TVLK: VAV terminal unit
TVLK-FL: VAV terminal unit with flanges on both ends

Parts and characteristics

Ready-to-commission unit which consists of mechanical parts and control components (attachments)
Averaging effective pressure sensor for volume flow rate measurement,
the construction with bluff body has a slide-out sensor that can be removed for cleaning
Damper blade
Factory assembled control components (attachments) complete with wiring and tubing
Aerodynamic functional testing on a special test rig before shipping of each unit
Set-up data is given on a label affixed to the unit

Attachments

LABCONTROL: Control components (attachments) for air management systems

Accessories

Matching flanges for both ends, including seals

Useful additions

Plastic secondary silencer Type CAK for demanding acoustic requirements

Construction features

Circular casing
Short casing: 392 mm without flange, 400 mm with flange
Spigot suitable for ducts according to DIN 8077
Both spigots with the same diameter (250 mm)
Position of the damper blade indicated externally at shaft extension

Materials and surfaces

Casing and damper blade made of flame-resistant polypropylene (PP), flammability to UL 94, V-0
Effective pressure sensor (bluff body or Venturi nozzle) and plain bearings made of polypropylene (PP)
Damper blade seal made of thermoplastic elastomers (TPE)

Standards and guidelines
Fulfils the hygiene requirements of

EN 16798, Part 3
VDI 6022, Sheet 1
DIN 1946, Part 4
For other applicable standards and guidelines refer to the hygiene certificate

Casing leakage

EN 1751, Class C

Closed blade air leakage

EN 1751, class 4
Meets the increased requirements of DIN 1946, Part 4, with regard to the acceptable closed blade air leakage

Maintenance

Maintenance-free as construction and materials are not subject to wear
We recommend zero point correction once a year; alternatively you can use the EASYLAB control component with the EM-AUTOZERO expansion module for automatic zero point correction

Information technique

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

Schematic illustration of the TVLK

① Nozzle (optional)

② EASYLAB control component

③ Casing

④ Actuator

⑤ Bluff body and sensor tubes

The VAV terminal unit is fitted with an effective pressure sensor with a bluff body or a nozzle for measuring the volume flow rate.

The control components (attachments) include an effective pressure transducer that transforms the effective pressure into an electric signal, a controller, and an actuator. The controller compares the actual value with the setpoint value and alters the control signal of the actuator if there is a difference between the two values.

Setpoint value default setting
Fume cupboard control

The volume flow rate setpoint depends on the control strategy for the fume cupboard:

Face velocity
Sash distance
Combination of face velocity and sash distance
Using switch contacts (2-point, 3-point)
Constant value

Volume flow control

The volume flow rate setpoint is specified by an external setpoint value setting

Quick sizing tables provide a good overview of the minimum differential pressures, the volume flow rate accuracy and the room sound pressure levels that can be expected. Intermediate values may be achieved by interpolation.

The sound power levels for calculating the sound pressure levels were measured in the TROX laboratory according to DIN EN ISO 5135 - see "Basic information and nomenclature".

Precise results and spectral data for all control components can be calculated with our Easy Product Finder design program. The first selection criteria for the nominal size are the actual volume flow rates q_vmin and q_vmax.

Volume flow rate ranges and minimum differential pressure values
The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control. It must be ensured that for all operating conditions and for all terminal units a sufficient pressure differential is applied to each controller (Δ_pstat,min). The measurement points for fan speed control must be selected accordingly. The volume flow rates given for VAV terminal units depend on the nominal size and on the control component (attachment) that is installed.

Volume flow rate ranges and minimum differential pressure values
Controller for static pressure measurements
Attachment: ELAB

NS	qv [l/s]	qv [m³/h]	Δpstmin [Pa]				Δqv [±%]
NS	qv [l/s]	qv [m³/h]	①	②	③	④	Δqv [±%]
250 - 100	57	202	2	2	2	2	10
250 - 100	172	618	17	18	18	18	7
250 - 100	288	1035	48	49	50	50	5
250 - 100	403	1451	94	95	97	99	5
250 - 160	30	108	3	3	3	3	10
250 - 160	92	330	26	26	26	26	7
250 - 160	153	551	71	71	72	72	6
250 - 160	214	773	139	140	140	141	5
250 - D08	76	273	1	1	1	2	11
250 - D08	233	838	9	9	10	10	7
250 - D08	389	1402	23	25	26	28	6
250 - D08	546	1967	45	48	51	54	5
250 - D10	55	196	2	2	2	2	10
250 - D10	167	601	10	11	11	11	7
250 - D10	279	1006	28	29	29	30	6
250 - D10	391	1411	54	56	57	59	5
250 - D16	31	111	2	2	2	2	10
250 - D16	94	340	15	15	16	16	7
250 - D16	158	569	42	42	43	43	5
250 - D16	221	798	82	83	83	84	5

① Basic unit
② Basic unit with circular silencer CAK, insulation thickness 50 mm, length 500 mm
③ Basic unit with circular silencer CAK, insulation thickness 50 mm, length 1000 mm
④ Basic unit with circular silencer CAK, insulation thickness 50 mm, length 1500 mm

Quick sizing table for sound pressure level

In the quick sizing tables, practical attenuation and insulation values (system attenuation) are included in the tables. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required. For more information on the acoustic data, see the basic information and nomenclature.

Quick sizing table for air-regenerated noise L_PA

Controller including silencer
(total flow rate range of type)

NS	qv [l/s]	qv [m³/h]	150 Pa				500 Pa
NS	qv [l/s]	qv [m³/h]	①	②	③	④	①	②	③	④
250 - 100	57	202	40	34	30	27	53	47	44	40
250 - 100	172	618	48	41	37	33	60	54	50	47
250 - 100	288	1035	49	41	38	34	62	55	52	48
250 - 100	403	1451	50	42	38	35	63	56	52	49
250 - 160	30	108	40	34	31	28	54	49	46	42
250 - 160	92	330	45	39	35	32	59	54	50	47
250 - 160	153	551	46	40	37	34	61	55	52	49
250 - 160	214	773	47	40	36	33	61	55	52	48
250 - D08	76	273	33	25	21	18	41	33	30	26
250 - D08	233	838	41	33	30	27	49	42	38	35
250 - D08	389	1402	43	36	32	29	51	44	40	37
250 - D08	546	1967	45	37	34	31	53	45	42	39
250 - D10	55	196	38	32	28	25	45	39	35	32
250 - D10	167	601	45	37	34	31	52	45	41	39
250 - D10	279	1006	46	38	35	32	53	46	42	40
250 - D10	391	1411	46	39	35	32	53	46	43	40
250 - D16	31	111	35	30	27	24	47	42	39	36
250 - D16	94	340	43	38	35	32	55	50	47	44
250 - D16	158	569	46	41	38	35	58	53	50	47
250 - D16	221	798	47	41	39	36	59	54	51	48

Air-regenerated noise L_PA [dB] at static differential pressure Δ_pst of 150 or 500 Pa

① Basic unit

② Basic unit with circular silencer CAK, insulation thickness 50 mm, length 500 mm

③ Basic unit with circular silencer CAK, insulation thickness 50 mm, length 1000 mm

④ Basic unit with circular silencer CAK, insulation thickness 50 mm, length 1500 mm

Quick sizing table for case-radiated noise L_PA

NS	qv [l/s]	qv [m³/h]	150 Pa	500 Pa
NS	qv [l/s]	qv [m³/h]	①
250 - 100	57	202	27	40
250 - 100	172	618	35	48
250 - 100	288	1035	39	52
250 - 100	403	1451	42	54
250 - 160	30	108	25	39
250 - 160	92	330	30	44
250 - 160	153	551	32	47
250 - 160	214	773	34	48
250 - D08	76	273	21	29
250 - D08	233	838	31	39
250 - D08	389	1402	36	44
250 - D08	546	1967	39	47
250 - D10	55	196	25	32
250 - D10	167	601	32	40
250 - D10	279	1006	36	43
250 - D10	391	1411	38	45
250 - D16	31	111	22	34
250 - D16	94	340	30	42
250 - D16	158	569	34	46
250 - D16	221	798	36	48

Case-radiated noise L_PA [dB] at static differential pressure Δ_pst of 150 or 500 Pa

n.a.: The specified static differential pressure Δ_pst is less than Δ_{pst min}.

Specification text

Circular VAV terminal units made of flame-resistant plastic, for variable air volume systems and fume cupboards. Suitable for the control of extract air containing hazardous particles, as all components coming into contact with the airflow are made of plastic (no interior metal parts). Ready-to-commission unit which consists of the mechanical parts and the electronic control components (attachments). Each unit contains an averaging effective pressure sensor with bluff body or a nozzle for volume flow rate measurement, and a damper blade. Factory assembled control components (attachments) complete with wiring and tubing. Effective pressure sensor with 3 mm measuring holes, hence resistant to contamination. Position of the damper blade indicated externally at shaft extension. The damper blade is factory set to open position, which allows a ventilation airflow even without control. Meets the hygiene requirements of EN 16798, Part 3, of VDI 6022, Sheet 1, and of DIN 1946, Part 4.

Special features

High control accuracy even in case of unfavourable upstream conditions
Integral effective pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
Construction with bluff body: Slide-out sensor tubes allow for easy inspection and cleaning
No metal parts come into contact with the airflow
Factory set-up or programming and aerodynamic function testing
Configuration and subsequent parameter setting for the control component can be done with the EasyConnect configuration software

Materials and surfaces

Casing and damper blade made of flame-resistant polypropylene (PP), flammability to UL 94, V-0
Effective pressure sensor (bluff body or Venturi nozzle) and plain bearings made of polypropylene (PP)
Damper blade seal made of thermoplastic elastomers (TPE)

Technical data

Nominal sizes: 250 mm
Volume flow rate range: 30 – 546 l/s or 108 – 1967 m³/h
Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
Minimum differential pressure: Up to 139 Pa (without circular silencer)
Maximum differential pressure: 1000 Pa
Closed blade air leakage to EN 1751, class 4
Casing air leakage to EN 1751, class C

Specification text for attachment
Variable volume flow control with an electronic EASYLAB controller for fume cupboards

Supply voltage 24 V AC/DC
Fast and stable control
Static effective pressure measurement
Fast-running actuator
Easy commissioning due to plug and play communication system
Controller is a modular system and can be expanded
Volume flow rate monitoring

Sizing data

q_ᵥ_______________________ [m³/h]
Δ_pst _______________________[Pa]

Air-regenerated noise

L_PA _______________________[dB(A)]

Case-radiated noise

L_PA _______________________[dB(A)]

Order code for fume cupboard control (with EASYLAB attachment)

TVLK

–

250 – 100

ELAB

FH – VS

UMZS

200 – 900 [m³/h]

1 Type
TVLK VAV terminal unit, plastic

2 Duct connection
No entry: Spigot
FL Flanges on both ends

3 Nominal size
250 – 100 Bluff body 100
250 – 160 Bluff body 160
250 – D08 Nozzle D08
250 – D10 Nozzle D10
250 – D16 Nozzle D16

4 Accessories
No entry: None
GK Matching flanges for both ends

5 Attachments (control component)
ELAB EASYLAB controller TCU3

6 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication interface (TROX HPD)

7 Equipment function
Fume cupboard control

With face velocity transducer
FH-VS Face velocity control strategy

With face velocity transducer and sash distance sensor
FH-VD Optimised face velocity control strategy

With sash distance sensor
FH-DS Linear control strategy
FH-DV Safety-optimised control strategy

With switch contacts (by others) for switching steps
FH-2P 2 switching steps
FH-3P 3 switching steps

Without signalling
FH-F Volume flow rate constant value control

8 Expansion modules
Option 1: Supply voltage
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point correction

Option 4: Lighting
No entry: None
S EM-LIGHT Wired socket for the connection of lighting and for switching the lighting on/off using the control panel (only with EM-TRF or EM-TRF-USV)

9 Operating values [m³/h or l/s]
Depending on the equipment function
FH-VS: q_ᵥmin – q_ᵥmax
FH-VD: q_ᵥmin – q_ᵥmax
FH-DS: q_ᵥmin – q_ᵥmax
FH-DV: q_ᵥmin – q_ᵥmax
FH-2P: q_ᵥ1/q_ᵥ2
FH-3P: q_ᵥ1/q_ᵥ2/q_ᵥ3
FH-F: q_ᵥ1

Useful additions
Control panel for fume cupboard controllers, for displaying the functions of the control system according to EN 14175
BE-SEG-02 OLED display
BE-LCD 40-character display

Order example: TVLK-FL/250–100/GK/ELAB/S/FH-VS/200–900 m³/h

Duct connection	With flange
Nominal size	250 with bluff body 100
Accessories	Matching flanges for both ends
Attachments (control component)	EASYLAB controller with fast-running actuator
Actuator	Fast-running actuator (3 s)
Equipment function	Fume cupboard control with face velocity transducer
Volume flow rate	q_vmin = 200 m³/h q_vmax = 900 m³/h

Order code for single operation (with EASYLAB attachment)

TVLK

–

250 – 100

ELAB

–

UMZ

… [m³/h]

1 Type
TVLK VAV terminal unit, plastic

2 Duct connection
No entry: Spigot
FL Flanges on both ends

3 Nominal size
250 – 100 Bluff body 100
250 – 160 Bluff body 160
250 – D08 Nozzle D08
250 – D10 Nozzle D10
250 – D16 Nozzle D16

4 Accessories
No entry: None
GK Matching flanges for both ends

5 Attachments (control component)
ELAB EASYLAB controller TCU3

6 Actuators
S Fast-running actuator (3 s)
SD Fast-running actuator (3 s), with digital communication interface (TROX HPD)

7 Equipment function
Single operation
EC Extract air controller

8 External volume flow rate setting
Depending on external volume flow rate setting
E0 Voltage signal 0 – 10 V DC
E2 Voltage signal 2 – 10 V DC
2P Switch contacts (provided by others) for 2 switching steps
3P Switch contacts (provided by others) for 3 switching steps
F Volume flow rate constant value, without signalling

9 Expansion modules
Option 1: Supply voltage
No entry: 24 V AC/DC
T EM-TRF for 230 V AC
U EM-TRF-USV for 230 V AC, provides uninterruptible power supply (UPS)

Option 2: Digital communication interface
No entry: None
B EM-BAC-MOD-01 for BACnet MS/TP
M EM-BAC-MOD-01 for Modbus RTU
I EM-IP for BACnet/IP, Modbus/IP and web server
R EM-IP with real time clock

Option 3: Automatic zero point correction
No entry: None
Z EM-AUTOZERO Solenoid valve for automatic zero point correction

10 Operating values [m³/h or l/s]
Depending on external volume flow rate setting:
E0, E2: q_ᵥmin/q_ᵥmax
2P: q_ᵥ1/q_ᵥ2
3P: q_ᵥ1/q_ᵥ2/q_ᵥ3
F: q_ᵥ1

Order example: TVLK/250–D08/ELAB/S/E2/400–1600 m³/h

Duct connection	Spigot
Nominal size	250 with nozzle D08
Attachments (control component)	EASYLAB controller TCU3
Actuator	Fast-running actuator (3 s)
external volume flow rate setting	Voltage signal 2 – 10 V DC
Operating values	q_vmin = 400 m³/h q_vmax = 1600 m³/h

Variants, Dimensions and weight, Product details, Further product details

VAV terminal unit TVLK with bluff body and connecting circular spigot

VAV TERMINAL UNIT TVLK WITH BLUFF BODY AND CONNECTING CIRCULAR SPIGOT

VAV terminal unit for variable volume flow control
Spigot

VAV terminal unit TVLK with bluff body and flange

VAV terminal unit for variable volume flow control
With flanges to make detachable connections to the ductwork

Order code detail	Part	Material
-	Casing	Plastic, polypropylene (PPs), flame resistant
-	Effective pressure sensor	Plastic, polypropylene (PPs), flame resistant
-	Damper blade	Plastic, polypropylene (PPs), flame resistant
-	Damper blade seal	Thermoplastic elastomer (TPE)
-	Shaft	Galvanised steel
-	Plain bearings	Plastic, polypropylene (PPs), flame resistant

Optional flange

Order code detail	Part	Material
FL	Flange	Plastic, polypropylene (PPs), flame resistant

Optional matching flange

Order code detail	Part	Material
GK	Matching flange	Plastic, polypropylene (PPs), flame resistant
GK	Seal	Rubber, EPDM

VAV terminal unit (TVLK)

Note: For exact dimensions of the space required for accessing the control component, see section Space required for commissioning and maintenance

Dimensions/weight of TVLK

NS	kg
250	5.1

Dimensions/weights of TVLK-FL

NS	kg
250	5.7

Space required for commissioning and maintenance

Sufficient space must be kept clear near any attachments to allow for commissioning and maintenance. It may be necessary to provide sufficiently sized inspection access openings. Product illustrations do not show any installation situation details. If an attachment requires a certain installation orientation, this is specified on a sticker on the product.

Space requirement, control components on two sides

Attachment	①	②	③	④	⑤	⑥
LABCONTROL
EASYLAB: ELAB	350	350	400	300	250	300

Space required for cleaning the sensor tubes

Nominal size	①	②	③
250-* bluff body	100	160	D ***
250-** nozzle	100	160	100

* Available bluff body sizes: 100 mm, 160 mm

** Available Venturi nozzle sizes: D08, D10, D16

*** D: Casing diameter

Bend

A bend with a centre line curvature radius of at least 1D – without an additional straight duct section upstream of the VAV terminal unit – has only a negligible effect on the volume flow rate accuracy.

Installation orientation

VAV terminal unit TVLK is made of plastic and intended for aggressive media
The control component has an integral static pressure transducer
Installation orientation must be as shown on the sticker

Commissioning

We recommend zero point correction once a year; alternatively you can use the EASYLAB control component with the EM-AUTOZERO expansion module for automatic zero point correction.

Upstream conditions

The volume flow rate accuracy Δ_qᵥapplies to a straight upstream section of the duct. Bends, junctions or a narrowing or widening of the duct cause turbulence that may affect measurement. Duct connections, e.g. branches off the main duct, must comply with EN 1505.

Téléchargements

Attachment	Controlled variable	Interface	Effective pressure transducer	Actuator	Manufacturer
EASYLAB
ELAB	qv, Δp *	TROX plug and play communication system and 0 - 10 V or 2 - 10 V or with optional accessories: Modbus, BACnet, web server	qv = integral Δp = separate	fast-running, separate or fast-running with digital communication interface (TROX HPD), separate	③

Information produit

Basic information and nomenclature - VAV terminal units

Basic-information-and-nomenclature_VAV-terminal-units_PD_2022_02_25_DE_en Basic information and nomenclature 490 ko pdf
Product data sheet Type TVLK

TVLK_PD_2021_11_05_DE_en Product data sheet 890 ko pdf

Certificats

Certificate concerning statistical leakage tests

LC_v1_2024_10_DE_en Certificate 660 ko pdf
Classe d'étanchéité des composants de ventilation TROX

Classe d'étanchéité_2021_05_31_DE_fr Certificat 670 ko pdf
Classification aux fuites des composants de ventilation TROX

Leckageklassifizierung-FK2-EU-v1_HC_2021_05_31_DE_fr Certificat 670 ko pdf
Declaration of conformity or declaration of incorporation Type TVLK

CE_VVS_DE_en Declaration of conformity or declaration of incorporation 70 ko pdf
Declaration of conformity or declaration of incorporation Type TVLK

CE/2010-12/TVLK/DE/en Declaration of conformity or declaration of incorporation 66 ko pdf
Declaration of hygiene conformity Type TVLK

TVLK_HC_2024_05_DE_en Hygiene certificate 2.1 Mo pdf
Leakage classification of TROX ventilation components

Leckageklassifizierung-_v1_2022_07_07_DE_en Certificate 680 ko pdf

Manuels d'utilisation

Installation manual Type VVS-Regelgeräte

A00000066402 Installation manual 1.4 Mo pdf

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