FBK_img_10psd.png
FBK-1-*-KF-SV

FBK_img_01psd.png
FBK-1-*-KF-SM

With clamping flange and dirt trap, adjustable on the rear side

FBK_img_06psd.png
FBK-1-*-SM

With compensating ring and dirt trap, adjustable on the rear side

FBK_img_12psd.png
FBK-2-*-KF-SM

Black floor diffuser with clamping flange and dirt trap

FBK_img_22psd.png
FBK-2-*-SV

Black floor diffuser with dirt trap

FBK_img_10psd.png
FBK_img_01psd.png
FBK_img_06psd.png
FBK_img_12psd.png
FBK_img_22psd.png

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

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.

Nominal sizes150, 200 mm
Volume flow rate range

1 – 59 l/s or 4 – 213 m³/h

Supply air to room air temperature difference

-12 to +20 K

Crush resistance> 5 kN


The quick lay-out provides a proficient overview of the possible volume flow rates, the corresponding sound power levels and pressure differences with horizontal air flow. The minimum volume flow rates apply to a supply air temperature difference of -6 K. The maximum volume flows apply to a sound power level of approx. 50 dB(A) Exact values for all parameters can be determined with our Easy Product Finder design program.

Air diffuser only

NS

qv

Δpt

LwA

l/sm³/hPa

dB(A)

15014

0

< 15
11391320
21774939
3211510950
20014

0

< 15
20721117
401434338
592139550

With plenum box

NS

qv

Δpt

LwA

l/sm³/hPa

dB(A)

15014

0

< 15
13471524
26935740
3914012750
20014

0

< 15
19671419
371335438
5519811950

With dirt trap

NS

qv

H4 = maximum

H4 = 45

H4 = 35

Δpt

LwA

Δpt

LwA

Δpt

LwA

l/sm³/hPa

dB(A)

Pa

dB(A)

Pa

dB(A)

15014

0

< 15

0

< 15

0

< 15
1139122014181621
2278483954396141
32116108501205113652

NS

qv

H4 = maximum

H4 = 50

H4 = 40

Δpt

LwA

Δpt

LwA

Δpt

LwA

l/sm³/hPa

dB(A)

Pa

dB(A)

Pa

dB(A)

20014

0

< 15

0

< 15

0

<15
2073111813191419
40143423849395640
5921493501105012652

With plenum box and dirt trap

NS

qv

H4 = maximum

H4 = 45

H4 = 35

Δpt

LwA

Δpt

LwA

Δpt

LwA

l/sm³/hPa

dB(A)

Pa

dB(A)

Pa

dB(A)

15014

0

< 15

0

< 15

0

< 15
1244142216191822
2486544060406942
36129119501355315554

NS

qv

H4 = maximum

H4 = 50

H4 = 40

Δpt

LwA

Δpt

LwA

Δpt

LwA

l/sm³/hPa

dB(A)

Pa

dB(A)

Pa

dB(A)

20014

0

< 15

0

< 15

0

< 15
1864131914191519
35125493854396039
52187108501215013351

Specification text

General information:

Floor diffusers as supply air diffusers for installation in raised floors of all types. Supply air provision either directly via the raised floor if it is constructed as a pressurised floor, or via a plenum box connected to the on-site air duct system.

Grille core with twist-shaped connecting bars made of plastic polyamide PA 6 UL94, V-0, flame-retardant.

Installation:

  1. With stepped compensating ring made of ABS plastic UL94, V-0, flame-retardant for precise installation in the raised floor
  2. With clamping flange and clamp spring attachment for easy assemblage with various base plate magnitude from 10 mm. The component made of plastic polyamide PA 6 UL94, V-0 centres the grille core and simultaneously secures it against twisting

Airflow direction:

  1. Without adjustable swirl unit for vertical airflow
  2. With adjustable swirl unit made from ABS plastic UL94-V-0 for vertical or horizontal airflow. If required, the swirl unit can be adjusted manually

Dirt trap:

  1. Without dirt trap and hence without damper element for volume flow rate balancing
  2. With dirt trap made of ABS plastic UL94-V-0 which also serves as an adjustable damper element for volume flow rate balancing

Plenum box:

  1. Without plenum box for installation in pressurised floor
  2. With plenum box made of galvanised sheet steel; plenum box with Ø 123 mm spigot for connection to the air duct system With incorporated air distribution element for a steady flow to the floor diffuser


Equivalence criteria

2 nominal sizes [mm]

  • 150
  • 200

2 versions

  • Diffuser face similar to RAL7037, dust grey
  • Diffuser face similar to RAL 9005, black

Volume flow rate range

  • 1 – 59 l/s or 4 – 213 m³/h

Supply air to room air temperature difference

  • -12 – 20 K

Crush resistance

  • > 5 kN

FBK2VKFSMA/150
|||||||
1234567
1 Type
FBK
Floor diffuser

2 Surface floor grille and trim ring
1
Similar to RAL 7037 (dusty grey)
2 Similar to RAL 9005 (jet black)

3 Airflow direction
No entry: vertical
V vertical, adjustable swirl unit
H horizontal, adjustable swirl unit

4 Installation
No entry: spacing ring for stepped holes
KF Trim ring and spring clip fixing

5 Dirt trap
No entry: without dirt trap
SM flow rate adjustment on the rear side
SV flow rate adjustment on the front side

6 Plenum box
No entry: without plenum box
A with plenum box

7 Nominal size [mm]
150, 200


Order example: FBK-2-V-KF-SM-A/150

TypeFBK
Surface of diffuser core and trim ringSimilar to RAL 9005 (jet black)
Swirl unit (to set the airflow direction)Vertical, adjustable swirl unit
InstallationTrim ring with spring clips
Dirt trapFlow rate adjustment from the underside
Plenum boxWith plenum box
Nominal size [mm]150

Variants, Product details

  • Varianten
  • PRODUKTDETAILS


  • Installation in pressurised floors without plenum box
  • Plan plenum boxes for rooms with individual volume flows and/or supply air temperatures
  • For raised floors (from 10 mm panel magnitude) with carpet coverings use floor diffusers with clamping flange for better edge protection
  • Clamping flanges are suitable for compensating tolerances when creating the installation opening. A particularly tight fit is achieved when the minimum dimension of the installation opening is realised
  • By installation without a clamping flange in a stepped bore use the supplied spacing ring to ensure the function and height compensation
  • Variants with adjustable swirl unit can be adjusted manually. Setting position H provides a horizontal supply airflow, setting position V provides a vertical supply airflow



The schematic diagrams are provided to illustrate installation details.

Downloads

product information

certificates

operation manuals

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Our department for Service-Requests will contact you asap.
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Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051