กรกฎาคม 4, 2022
กรกฎาคม 6, 2022



Plastic circular VAV terminal units for aggressive extract air in variable air volume systems

  • Casing and damper blade made of flame-resistant polypropylene
  • Slide-out effective pressuresensor allows for easy cleaning
  • Suitable for the control of volume flow rate, room pressure or duct pressure
  • Electronic control components for different applications (Universal and LABCONTROL)
  • Suitable for airflow velocities up to 13 m/s
  • Closed blade air leakage to EN 1751, class 3
  • Casing air leakage to EN 1751, class B

Optional equipment and accessories

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


General Information


  • Circular VAV terminal units for use in ventilation and air conditioning systems
  • VAV terminal units made from plastic, suitable for contaminated air
  • For controlling, restricting or shutting off airflows, preferably extract air flows
  • Closed-loop volume flow control using an external power supply
  • For variable or constant volume flow systems
  • Shut-off by means of switching (by others)
  • Can also be used for duct or room pressure control with suitable control components

Special features

  • Slide-out integral effective pressure sensor with 3 mm measuring holes (resistant to contamination)
  • Factory set-up or programming and aerodynamic function testing
  • Parameters can also later be set on the control component; an additional adjustment device may be necessary

Nominal sizes

  • 125, 160, 200, 250, 315, 400


  • TVRK: VAV terminal unit
  • TVRK-FL: VAV terminal unit with flanges on both ends

Parts and characteristics

  • Ready-to-commission unit which consists of mechanical parts and control components.
  • Averaging effective pressure sensor for volume flow rate measurement; can be removed for cleaning
  • Damper blade
  • Factory mounted control components 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
  • High control accuracy (even with upstream bend R = 1D)


  • Universal controller: controller, effective pressure transducer, and actuators for special applications
  • LABCONTROL: control components for air management systems


  • Matching flanges for both ends, including seals

Useful additions

  • Plastic secondary silencer Type CAK for demanding acoustic requirements

Construction features

  • Circular casing
  • Spigot suitable for ducts according to DIN 8077
  • Both spigots with the same diameter
  • Position of the damper blade indicated externally at shaft extension

Materials and surfaces

  • Casing and damper blade made of flame-resistant polypropylene (PPs)
  • Effective pressure sensor and plain bearings made of polypropylene (PP)
  • Damper blade seal made of chloroprene rubber (CR)
  • Stainless steel shaft, material no. 14104

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 B

Closed blade air leakage

  • EN 1751, Class 3
  • Meets the general requirements of DIN 1946, part 4, with regard to the acceptable closed blade air leakage


  • Maintenance-free as construction and materials are not subject to wear
  • Zero point correction of the static effective pressure transducer should be carried out once per year (recommendation)



Product Information



Operation Manuals