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 characteristics
- High control accuracy even in case of unfavourable upstream conditions
- Integral effective pressure sensor with 0.1 in 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: 10 – 4, 10 – 6
- Nozzle: 10 – D08, 10 – D10, 10 – 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 slideout 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: 15 in without flange, 400 mm with flange
- Spigot suitable for ducts according to DIN 8077
- Both spigots with the same diameter (1o in)
- Position of the damper blade indicated externally at shaft extension
Material 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
