An automatic volume flow controller, which removes the tedious and expensive process of adjusting flow rates in ventilation and air conditioning systems, has been unveiled by leading air movement manufacturer TROX (UK).

The maintenance-free Type VFL unit, which can be adjusted on-site in seconds, has a differential pressure range of 30 to 300Pa. It can be used at diffusers to replace manually operated volume control dampers or volume control blades, or in residential bathroom ventilation systems.

The VFL comprises a control unit, including the mechanical components of damper, bridge, bellow, and leaf spring, surrounded by a sheath tube that protects the interior movable components.

The unit is factory set to a reference volume flow. To change the volume flow setting on site, the control unit is simply twisted and pulled out of the sheath tube. Then, a special screwdriver is used to loosen the screws on either end of the set value adjuster. The set value adjuster can then be set to the required volume and the unit replaced quickly and easily.

Benefits of the VFL include:

• Large volume flow range
• Near-continuous adjustment of volume flow
• Large pressure range
• Easy and precise volume flow adjustment to the strictest tolerances
• Fast and simple installation into circular ventilation ducts
• Proven technology of the TROX R Type controller

Further details are available on www.troxuk.co.uk

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