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FBK-1-*-KF-SV

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FBK

Round plastic air diffusers for installation in the floor

Air diffuser for different installation situations and room air flows

  • Nominal sizes 150, 200 mm
  • Volume flow rate range 1 – 59 l/s or 4 – 213 m³/h
  • Circular diffuser face style
  • For constant and variable volume flows
  • For all types of raised floors
  • Horizontal or vertical airflow
  • Damper element can be adjusted on the front or rear side
  • Can be installed with or without clamping flange
  • The clamping flange allows quick and easy installation and removal of the grille core for cleaning purposes
  • Ideal for comfort zones

Optional equipment and accessories

  • Adjustable swirl unit for manual adjustment between vertical and horizontal air routing
  • Clamping flange with clamp spring attachment to cover the installation opening
  • Dirt trap can also be used as a damper element
  • Plenum box

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Allgemeine Informationen

Application

  • Floor diffusers as supply air diffusers for comfort areas

  • Installation in raised floors without plenum box if it is constructed as a pressurised floor

  • Installation in raised floors with plenum box to allow individual ventilation in rooms or zones

  • Vertical supply airflow, with adjustable swirl unit and added horizontal air routing

  • Variants with adjustable swirl units can be manually set to vertical or horizontal air routing

  • Surface floor grille and clamping flange in 2 factory-available colours - for builders and architects with special demands on architecture and design

  • Comfortable and energy-efficient airflow through supporting convection currents in the occupied zone

  • Thermal loads are effectively dissipated

  • For constant and variable volume flows

  • For supply air temperature differences of -12 - +20 K


Special characteristics

  • Simple and quick assembly and covering of the installation opening when used with clamping flange and clamp spring attachment
  • Installation in hard flooring requires a compensating ring. The compensating ring is included in the delivery if no clamping flange has been selected
  • Grille inserts are twist-proof when combined with clamping flange
  • Quick and easy installation of floor diffusers with clamping flange and clamp spring attachment
  • With or without swirl unit to allow for various air patterns
  • Dirt trap adjustable at the front and rear, which can be used for volume flow balancing and reduces soiling of the raised floor


Nominal sizes

  • 150, 200


Variants

Setting of the airflow direction

  • -*: no entry: vertical airflow, inalterable
  • -V: vertical swirling airflow, the swirl unit is manually adjustable
  • -H: horizontal swirling airflow, manually adjustable swirl unit

Installation

  • -*: Floor diffuser with compensating ring
  • -KF: Floor diffuser with clamping flange and clamp spring attachment

Dirt trap

  • -*: Floor diffuser with compensating ring
  • -SM: with adjustable dirt trap The adjustment which simultaneously serves as a damper element to balance the volume flow, is carried out at the rear of the diffuser
  • -SV: with adjustable dirt trap. The adjustment which simultaneously serves as a damper element to balance the volume flow, is carried out at the front of the diffuser

Plenum box

  • -*: no entry: without plenum box
  • -A: with plenum box for connection to the on-site air duct system


Construction

  • -1: Diffuser face similar to RAL 7037, dust grey
  • -2: Diffuser core similar to RAL 9005, black


Parts and characteristics

Diffuser core

  • Ring spacing 6 mm
  • Height-adjustable dirt trap serves as a damper element for volume flow rate balancing
  • Adjustable swirl unit for swirling airflow in vertical or horizontal flow direction

Clamping flange with clamp spring attachment

  • Anti-twist device for the grille insert
  • Covers the installation opening
  • Clamp spring attachment enables different magnitude of the raised floor and the compensation of large cut-out tolerances when creating the installation openings. For the tightest possible fit of the clamping flange, we recommend the minimum installation dimension
  • Levelling of soft flooring, e.g. carpet


Attachments

  • Clamping flange with clamp spring attachment
  • Adjustable swirl unit for vertical or horizontal swirling airflow
  • Fixed swirl unit for vertical airflow (only for nominal size 200)
  • Height-adjustable dirt trap which also serves as a damper element for volume flow rate balancing


Accessories

Plenum box -A:

  • For direct connection to the on-site air duct system
  • With incorporated air distribution element for a steady flow to the floor diffuser
  • Plenum box suitable for all nominal sizes


Material and surfaces

  • Grille core and clamping flange made of plastic Polyamide PA 6 UL94, V-0
  • Spring clips made of stainless steel
  • Adjustable swirl unit and dirt trap made of ABS plastic UL94, V-0
  • Compensating ring made of ABS plastic UL94, V-0
  • Dirt trap adjustment device and connective material made of galvanised steel
  • Plenum box made of galvanised sheet steel
  • Plastic surface, optionally in the colours dust grey (similar to RAL 7037) or deep black (similar to RAL 9005)


Technical data

  • Nominal sizes: 150, 200 mm
  • Volume flow rate range: 1 – 59 l/s or 4 – 213 m³ /h
  • Supply air temperature difference: -12 - +20 K
  • Crush resistance > 5 kN

Technical information

Function, Technical data, Quick sizing, Specification text, Order code

  • Function
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
Schematische Darstellung FB_gc_17svg.png

A FBK-...-KF

B FBK

C FBK-...-KF-A

1 Frontdurchlass

2 Gehäuse mit Klemmflansch und Klemmfedern

3 Ausgleichsring

Optional

4 Schmutzfangkorb

5 Anschlusskasten

6 Bodenplatte (bauseitig)

Floor diffusers allow supply air in mechanical ventilation and air conditioning systems to flow into the room from below or from the floor. For adaptation to different local conditions, 3 different variants of the air routings are possible.


 


Vertical flow without adjustment option


Without adjustable swirl unit, the supply air flows vertically into the room at a moderate speed. Since cold air is heavier than warm air, the direction of flow reverses and the supply air flows back towards the floor. A low-turbulence or swell-like flow spreads over the entire floor surface. A lift current forms at heat sources such as people and equipment, so that the air is primarily exchanged in these areas.


This type of hybrid ventilation or mixed-source ventilation is designed exclusively for cooling operation. It is particularly suitable for rooms with a clear division between circulation and occupied areas. These include, for instance, cinema or theatre halls and waiting areas. The maximum supply air temperature difference should not exceed -6 K. The exhaust air should be dissipated in the upper part of the room, above the occupied zone.


 


Horizontal swirling airflow


An adjustable swirl unit set for vertical flow causes a swirling vertical supply air flow into the room. In doing so, the supply air induces room air near the floor surface and quickly reduces the air velocity as well as the temperature difference between supply air and room air. This type of mixed ventilation is particularly suitable for areas that are permanently intended for people to remain. This includes, for example, office spaces or assembly and
meeting rooms.


 


Vertical swirling airflow


An adjustable swirl blade set for vertical flow causes a swirling vertical supply air flow into the room. Through this process, the supply air induces room air. There is a rapid reduction in flow velocities and a quick reduction of the temperature difference between supply air and room air. This type of mixed ventilation results in proficient room ventilation. It is particularly suitable for areas in which people do not remain for longer periods of time. This includes corridors or similar circulation areas.

Variants, Product details

  • Varianten
  • PRODUKTDETAILS


Downloads

product information

certificates

operation manuals

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Contact

Thank you for your message!

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265