Type 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

VAV terminal unit, variant TVLK, with nozzle and flange 00131763_0
  • Application
  • Description

Application

  • Circular LABCONTROL VAV terminal units of Type TVLK, made of plastic, to control the volume flow rate of fume cupboards and fume hoods
  • Suitable for contaminated air
  • Closed-loop volume flow control using an external power supply
  • Shut-off by means of switching (equipment supplied by others)

Special characteristics

  • High control accuracy even in case of unfavourable upstream conditions
  • Integral slide-out differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • No metal parts come into contact with the airflow
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool or configuration software may be necessary

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 differential pressure sensor for volume flow rate measurement; 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 prior to shipping of each unit
  • Unit carries test label with relevant data

Attachments

  • LABCONTROL: Control components (attachments) for air management systems
  • Universal controller: Controller, differential pressure transducer and actuators for special applications

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 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
  • Differential pressure sensor (with bluff body, or nozzle) and plain bearing made of polypropylene (PP)
  • Damper blade seal made of thermoplastic elastomers (TPE)

Technical information

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
Skjematisk framstilling av TVLK 00137305_0

① Nozzle (optional)

② EASYLAB control component

③ Casing

④ Actuator

⑤ Bluff body and sensor tubes

Functional description

For measuring the volume flow rate the VAV terminal unit is fitted either with a bluff body and a differential pressure sensor or with a nozzle.

The control components (attachments) include a differential pressure transducer that transforms the differential pressure (effective pressure) into an electric signal, a controller, and an actuator.

  • Fume cupboard control: The volume flow rate setpoint depends on the control strategy for the fume cupboard and is based on the face velocity, the sash position, or a constant value.
  • Volume flow control: The volume flow rate setpoint comes from an external unit.

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.

Nominal sizes250 mm
Volume flow rate range30 – 515 l/s or 108 – 1854 m³/h
Volume flow rate control rangeApprox. 15 to 100 % of the nominal volume flow rate
Minimum differential pressure5 – 130 Pa
Maximum differential pressure1000 Pa
Operating temperature10 – 50 °C


Quick sizing: Sound pressure level at differential pressure 150 Pa TVLK with EASYLAB or TCU-LON-II

Nominal sizeVVAir-regenerated noiseAir-regenerated noiseAir-regenerated noiseAir-regenerated noiseCase-radiated noise
Nominal sizeVV
Nominal sizeVVLPALPA1LPA1LPA1LPA2
Nominal sizel/sm³/hdB(A)dB(A)dB(A)dB(A)dB(A)
250-100 55 198 4033292626
250-100 140 504 4638343133
250-100 220 792 4739353137
250-100 360 1296 4839353242
250-160 30 108 3732282522
250-160 80 288 4135312829
250-160 120 432 4337333032
250-160 195 702 4942383540
250-D08 95 342 3626232023
250-D08 210 756 4031272429
250-D08 315 1134 4132292633
250-D08 515 1854 4434312838
250-D10 55 198 3628242124
250-D10 140 504 4234302731
250-D10 220 792 4335312835
250-D10 360 1296 4537332938
250-D16 30 108 3328242221
250-D16 80 288 3933302828
250-D16 120 432 4236333031
250-D16 195 702 4742383638

① TVLK

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

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

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


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 aggressive media since 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 differential 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.

Differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)

Spigot, suitable for ducts according to DIN 8077.

Position of the damper blade indicated externally at shaft extension.

Closed blade air leakage to EN 1751, class 4.

Casing air leakage to EN 1751, class C.

Special characteristics

  • High control accuracy even in case of unfavourable upstream conditions
  • Integral slide-out differential pressure sensor with 3 mm measuring holes (resistant to dust and pollution)
  • No metal parts come into contact with the airflow
  • Factory set-up or programming and aerodynamic function testing
  • Volume flow rate can be measured and subsequently adjusted on site; additional adjustment tool or configuration software may be necessary

Materials and surfaces

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

Technical data

  • Nominal sizes: 250 mm
  • Volume flow rate range: 30 to 515 l/s or 108 to 1854 m³/h
  • Volume flow rate control range: approx. 15 – 100 % of the nominal volume flow rate
  • Minimum differential pressure: 5 – 130 Pa
  • Maximum differential pressure: 10 – 50 °C

Attachments

Variable volume flow control with electronic EASYLAB controller for fume cupboards.

  • Supply voltage 24 V AC
  • Fast and stable control
  • Static differential 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

00132123_0

 Type
TVLK       VAV terminal unit, plastic

 Flange
          No entry: none
FL      Flanges on both ends

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

 Accessories
          No entry: none
GK     Matching flanges for both ends

 Attachments (control component)
ELAB       EASYLAB controller TCU3 with fast-running actuator

 Equipment function
          With face velocity transducer
FH-VS       Face velocity control
          With sash distance sensor
FH-DS        Linear control strategy
FH-DV       Safety-optimised control strategy
          With switching steps for on-site switch con tacts
FH-2P       2 switching steps
FH-3P       3 switching steps
          Without signalling
FH-F       Volume flow rate constant value

 Expansion modules
          Option 1: Supply voltage
          No entry: 24 V AC
T       EM-TRF for 230 V AC
U       EM-TRF-USV for 230 V AC, provides unin terruptible power supply (UPS)
          Option 2: Communication interface
          No entry: none
L      EM-LON for LonWorks FTT-10A
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 webserver
R      EM-IP with real time clock
          Option 3: Automatic zero point correction
          No entry: none
Z       EM-AUTOZERO Solenoid valve for auto matic 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)

 Operating values [m³/h or l/s]
       Depending on the equipment function
       VS: Vmin – Vmax
       DS: Vmin – Vmax
       DV: Vmin – Vmax
       2P: V1 / V2
       3P: V1 / V2 / V3
       F: V1

Useful additions
          Control panel for fume cupboard controller, for displaying the functions of the control system according to EN 14175
BE-SEG-** OLED display
BE-LCD-01 40-character display

 

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Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613