TVLK

Quick sizing tables provide a good overview of the minimum differential pressures, the volume flow rate accuracy and the room sound pressure levels that can be expected. Intermediate values may be achieved by interpolation.

The sound power levels for calculating the sound pressure levels were measured in the TROX laboratory according to DIN EN ISO 5135 - see "Basic information and nomenclature".

Precise results and spectral data for all control components can be calculated with our Easy Product Finder design program. The first selection criteria for the nominal size are the actual volume flow rates q_vmin and q_vmax.

Volume flow rate ranges and minimum differential pressure values
The minimum differential pressure of VAV terminal units is an important factor in designing the ductwork and in rating the fan including speed control. It must be ensured that for all operating conditions and for all terminal units a sufficient pressure differential is applied to each controller (Δ_pstat,min). The measurement points for fan speed control must be selected accordingly. The volume flow rates given for VAV terminal units depend on the nominal size and on the control component (attachment) that is installed.

Volume flow rate ranges and minimum differential pressure values
Controller for static pressure measurements
Attachment: ELAB

① Basic unit
② Basic unit with circular silencer CAK, insulation thickness 50 mm, length 500 mm
③ Basic unit with circular silencer CAK, insulation thickness 50 mm, length 1000 mm
④ Basic unit with circular silencer CAK, insulation thickness 50 mm, length 1500 mm

Quick sizing table for sound pressure level

In the quick sizing tables, practical attenuation and insulation values (system attenuation) are included in the tables. If the sound pressure level exceeds the required level, a larger air terminal unit and/or a silencer is required. For more information on the acoustic data, see the basic information and nomenclature.

Quick sizing table for air-regenerated noise L_PA

Controller including silencer
(total flow rate range of type)

Air-regenerated noise L_PA [dB] at static differential pressure Δ_pst of 150 or 500 Pa

① Basic unit

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

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

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

Quick sizing table for case-radiated noise L_PA

Case-radiated noise L_PA [dB] at static differential pressure Δ_pst of 150 or 500 Pa

n.a.: The specified static differential pressure Δ_pst is less than Δ_{pst min}.

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.

• 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

• 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)

• 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

• q_ᵥ _______________________ [m³/h]
• Δ_pst _______________________[Pa]

• L_PA _______________________[dB(A)]

• L_PA _______________________[dB(A)]

Attachments
Type Universal, static
Type EASYLAB TCU3

Additional products
Type CAK

LABCONTROL EASYLAB control components

① TROX

 * The controlled variable depends on the type of VAV terminal unit

• TVR, TVRK: Fume cupboard, room supply air, room extract air, room pressure, single controller
• TVLK: Fume cupboard, single controller
• TVJ, TVT: Room supply air, room extract air, room pressure, single controller
• TVZ, TZ-Silenzio: Room supply air, room pressure, single controller
• TVA, TA-Silenzio: Room extract air, room pressure, single controller