TVLK_img_05psd.png
VAV terminal unit TVLK with nozzle and flange

TVLK_img_13psd.png
Easy cleaning of sensor tubes

Easy cleaning of sensor tubes

TVLK_img_10psd.png
Variant with nozzle and connecting circular spigot

Variant with nozzle and connecting circular spigot

TVLK_img_09psd.png
Variant with bluff body and flange

Variant with bluff body and flange

LVC_gc_05ai.png
For all upstream conditions

For all upstream conditions

doc_graphic_000009.png
Tested to VDI 6022

Tested to VDI 6022

TVLK_img_05psd.png
TVLK_img_13psd.png
TVLK_img_10psd.png
TVLK_img_09psd.png
LVC_gc_05ai.png
doc_graphic_000009.png

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


Technical information

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

  • FUNCTION
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
  • RELATED PRODUCTS
Schematic illustration of the TVLK TVLK_gc_01ai.png

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

Nominal sizes250 mm
Volume flow rate range 30 – 515 l/s or 108 – 1854 m³ /h
Volume flow rate control range Approx. 15 to 100 % of the nominal volume flow rate
Minimum differential pressure5 – 130 Pa
Maximum differential pressure1000 Pa
Operating temperature10 – 50 °C


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 qvmin and qvmax.

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 (Δpstat,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

NSqv [l/s]qv [m³/h]Δpstmin [Pa]Δqv [±%]
250 - 10057202222210
250 - 100172618171818187
250 - 1002881035484950505
250 - 1004031451949597995
250 - 16030108333310
250 - 16092330262626267
250 - 160153551717172726
250 - 1602147731391401401415
250 - D0876273111211
250 - D082338389910107
250 - D083891402232526286
250 - D085461967454851545
250 - D1055196222210
250 - D10167601101111117
250 - D102791006282929306
250 - D103911411545657595
250 - D1631111222210
250 - D1694340151516167
250 - D16158569424243435
250 - D16221798828383845

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 LPA

Controller including silencer
(total flow rate range of type)

NSqv [l/s]qv [m³/h]150 Pa500 Pa
250 - 100572024034302753474440
250 - 1001726184841373360545047
250 - 10028810354941383462555248
250 - 10040314515042383563565249
250 - 160301084034312854494642
250 - 160923304539353259545047
250 - 1601535514640373461555249
250 - 1602147734740363361555248
250 - D08762733325211841333026
250 - D082338384133302749423835
250 - D0838914024336322951444037
250 - D0854619674537343153454239
250 - D10551963832282545393532
250 - D101676014537343152454139
250 - D1027910064638353253464240
250 - D1039114114639353253464340
250 - D16311113530272447423936
250 - D16943404338353255504744
250 - D161585694641383558535047
250 - D162217984741393659545148

Air-regenerated noise LPA [dB] at static differential pressure Δpst 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 LPA

NSqv [l/s]qv [m³/h]150 Pa500 Pa
250 - 100572022740
250 - 1001726183548
250 - 10028810353952
250 - 10040314514254
250 - 160301082539
250 - 160923303044
250 - 1601535513247
250 - 1602147733448
250 - D08762732129
250 - D082338383139
250 - D0838914023644
250 - D0854619673947
250 - D10551962532
250 - D101676013240
250 - D1027910063643
250 - D1039114113845
250 - D16311112234
250 - D16943403042
250 - D161585693446
250 - D162217983648

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

n.a.: The specified static differential pressure Δpst is less than Δpst 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_______________________ [m³/h]
    • Δpst _______________________[Pa]

    Air-regenerated noise
    • LPA _______________________[dB(A)]

    Case-radiated noise
    • LPA _______________________[dB(A)]


    Order code for fume cupboard control (with EASYLAB attachment)
    TVLKFL / 250 – 100 / GK / ELAB / S / FH – VS / UMZS / 200 – 900 [m³/h]
    |||||||||
    123456789
    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: qᵥmin – qᵥmax
    FH-VD: qᵥmin – qᵥmax
    FH-DS: qᵥmin – qᵥmax
    FH-DV: qᵥmin – qᵥmax
    FH-2P: qᵥ1 /qᵥ2
    FH-3P: qᵥ1 /qᵥ2/qᵥ3
    FH-F: qᵥ1
     
    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 connectionWith flange
    Nominal size250 with bluff body 100
    AccessoriesMatching flanges for both ends
    Attachments (control component)EASYLAB controller with fast-running actuator
    ActuatorFast-running actuator (3 s)
    Equipment functionFume cupboard control with face velocity transducer
    Volume flow rateqvmin = 200 m³/h
    qvmax = 900 m³/h


    Order code for single operation (with EASYLAB attachment)
    TVLKFL / 250 – 100 / GK / ELAB / S / ECE0 / UMZ / … [m³/h]
    ||||||||||
    12345678910
    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
    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: qᵥmin/qᵥmax
    2P: qᵥ1/qᵥ2
    3P: qᵥ1/qᵥ2/qᵥ3
    F: qᵥ1

    Order example: TVLK/250–D08/ELAB/S/E2/400–1600 m³/h
    Duct connectionSpigot
    Nominal size250 with nozzle D08
    Attachments (control component)EASYLAB controller TCU3
    ActuatorFast-running actuator (3 s)
    external volume flow rate settingVoltage signal 2 – 10 V DC
    Operating valuesqvmin = 400 m³/h
    qvmax = 1600 m³/h

    Attachments
    Type Universal, static
    Type EASYLAB TCU3

    Additional products
    Type CAK

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

    • VARIANTS
    • DIMENSIONS AND WEIGHT
    • PRODUCT DETAILS
    • FURTHER PRODUCT DETAILS

    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


    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

    LABCONTROL





















    EASYLAB: ELAB


    350 350 400 300 250 300


    Space required for cleaning the sensor tubes



    Nominal size










    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


    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 Δqᵥ applies 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.


      LABCONTROL EASYLAB control components

      AttachmentControlled variableInterfaceEffective pressure transducerActuatorManufacturer
      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


      ① TROX

       * The controlled variable depends on the type of VAV terminal unit

      • TVR, TVRK: Fume cupboard, room supply air, room extract air, room pressure, single controller
      • TVLK: Fume cupboard, single controller
      • TVJ, TVT: Room supply air, room extract air, room pressure, single controller
      • TVZ, TZ-Silenzio: Room supply air, room pressure, single controller
      • TVA, TA-Silenzio: Room extract air, room pressure, single controller

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      Thank you for your message!

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