TVLK

Easy cleaning of sensor tubes 

Variant with nozzle and connecting circular spigot 

Variant with bluff body and flange 

For all upstream conditions

Tested to VDI 6022 

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 
  • SPECIFICATION TEXT 
  • ORDER CODE 
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

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

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

  • qᵥ _______________________ [m³/h]
  • Δpst _______________________[Pa]
Air-regenerated noise
  • LPA _______________________[dB(A)]
Case-radiated noise
  • LPA _______________________[dB(A)]
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

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: qᵥmin/qᵥmax
2P: qᵥ1
/qᵥ2
3P: qᵥ1
/qᵥ2
/qᵥ3
F: qᵥ1


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

Downloads

product information

operation manuals

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Contact

Thank you for your message!

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +60 6 678 8188 | Fax: +60 6 678 8288 (388)