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

Download

Product Information

Certificates

Operation Manuals