Type QSH

For industrial zones with air polluting processes

Displacement flow diffusers with bell-shaped, low turbulence air discharge in cooling mode

  • Nominal sizes 250, 355, 450, 560 mm
  • Volume flow rate range 205 – 1570 l/s or 738 – 5652 m³/h
  • Casing made of galvanised sheet steel
  • For variable and constant volume flows
  • Installation either free hanging or on walls or pillars
  • Low-turbulence displacement ventilation
  • Discharge direction can be adjusted manually or with an actuator
  • Chain pull for adjusting the discharge direction manually


Optional equipment and accessories

  • Exposed diffuser parts in RAL CLASSIC colours
  • Electric and thermal actuators for adjusting the air discharge direction
  • Bowden cable for adjusting the discharge direction manually
  • Wall mount

QSH 00131788_0


  • Application
  • Description

Application

  • Type QSH displacement flow diffusers are used primarily for industrial zones with air polluting work processes
  • Bell-shaped air discharge in cooling mode, vertical air discharge in heating mode
  • Low-turbulence displacement of polluted or contaminated air in the occupied zone
  • For variable and constant volume flows
  • For supply air to room air temperature differences from –8 to +12 K
  • Installation at heights between 3.5 m and 10 m, either free hanging or on walls or pillars
  • Installation preferably outside of occupied zones, e.g. in corridors
  • Ideal for use with TDC temperature difference control module

Special characteristics

  • Bell-shaped, low-turbulence air discharge in cooling mode
  • Air discharge direction is adjusted manually or with an electric or thermal actuator

Nominal sizes

  • 250, 355, 450, 560 mm

Parts and characteristics

  • Perforated sheet metal casing
  • Air control disc to control the air discharge direction
  • Top entry spigot for connection to a vertical duct

Attachments

  • Chain pull for manual adjustment, approx. 2.0 m
  • B: Bowden cable for manual adjustment, approx. 2.8 m
  • E*: Electric actuator
  • T: Thermal actuator

Accessories

  • W00: Wall mount
  • K00: Chain fixing
  • WK0: Wall mount and chain fixing

Construction features

  • Spigot suitable for circular ducts to EN 1506 or EN 13180

Materials and surfaces

  • Casing with base plate, cross bar and air control disc made of galvanised sheet steel
  • Chain pull made of galvanised steel
  • Pulley wheels made of plastic, UL 94, V-0, flame retardant
  • B: Hand lever made of galvanised steel, Bowden cable made of galvanised steel and with PE sheath
  • P0: Powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour

Standards and guidelines

  • Sound power level of the air-regenerated noise measured according to EN ISO 5135

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Inspection and cleaning to VDI 6022

Technical information

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

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

Functional description

Displacement flow diffusers discharge the air from air conditioning systems vertically and with a low velocity into the room, causing very little turbulence. This results in a very good air quality in the occupied zone.

Type QSH displacement flow diffusers are used primarily for industrial zones with air polluting work processes. They are installed preferably outside of occupied zones, e.g. high up in corridors. An adjustable air control disc allows for adapting the air discharge direction to heating or cooling mode. The supply air to room air temperature difference may range from –8 to +12 K.


Cooling mode

In cooling mode the supply air is discharged outside the occupied zone, from above and in a bell-shaped air pattern. This creates a pool of fresh air over the entire floor area, similar to displacement ventilation where the air is supplied near the floor. The convection from people and other heat sources causes the fresh air from the pool to rise and create comfortable conditions in the occupied zone.


Heating mode

In heating mode the air is discharged vertically.


The air control disc can be adjusted manually or with a thermal or electric actuator.

Extract air units should be installed in the upper part of a room, above the occupied zone.

Nominal sizes

250, 355, 450, 560 mm

Minimum volume flow rate

205 – 785 l/s or 738 – 2826 m³/h

Maximum volume flow rate, with LWA ≅ 55 dB(A)

410 – 1570 l/s or 1476 – 5652 m³/h

Supply air to room air temperature difference

–8 to +12 K


Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The maximum volume flow rates apply to a sound power level of approx. 55 dB (A).

Sizing example

Given data

V = 500 l/s (1800 m3/h)

Displacement flow diffuser for installation in corridors

Maximum sound power level 50 dB(A)

Quick sizing

Type QSH

Nominal sizes: 355, 450

Selected: QSH/355

QSH supply air, horizontal air discharge, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

250

205

738

12

31

250

270

972

20

41

250

340

1224

32

48

250

410

1476

47

55

355

335

1206

11

34

355

435

1566

18

43

355

535

1926

27

50

355

635

2286

39

55

450

470

1692

9

27

450

625

2250

16

39

450

780

2808

25

48

450

940

3384

36

55

560

785

2826

14

29

560

1050

3780

25

40

560

1310

4716

39

49

560

1570

5662

56

55


QSH supply air, vertical air discharge, sound power level and total differential pressure

Nominal size V Δpt LWA
Nominal size l/s m³/h Pa dB(A)

250

205

738

12

36

250

265

954

21

44

250

335

1206

33

51

250

385

1386

44

55

355

335

1206

11

38

355

420

1512

17

45

355

505

1818

25

51

355

590

2124

34

55

450

470

1692

10

33

450

595

2142

16

42

450

725

2610

24

49

450

855

3078

33

55

560

785

2826

15

36

560

990

3564

24

45

560

1180

4248

34

51

560

1370

4932

46

55


Displacement flow diffusers with a cylindrical casing, for industrial zones with air polluting work processes. With adjustable air control disc for air discharge from bell-shaped to vertical (90°). For free hanging installation and also for installation on walls or pillars, preferably outside the occupied zone, e.g. in corridors.

Ready-to-install component which consists of a cylindrical, perforated metal casing, air control disc and top entry spigot.

Spigot suitable for ducts to EN 1506 or EN 13180.

Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

  • Bell-shaped, low-turbulence air discharge in cooling mode
  • Air discharge direction is adjusted manually or with an electric or thermal actuator

Materials and surfaces

  • Casing with base plate, cross bar and air control disc made of galvanised sheet steel
  • Chain pull made of galvanised steel
  • Pulley wheels made of plastic, UL 94, V-0, flame retardant
  • B: Hand lever made of galvanised steel, Bowden cable made of galvanised steel and with PE sheath
  • P0: Powder-coated RAL 9010, pure white
  • P1: Powder-coated, RAL CLASSIC colour

Technical data

  • Nominal sizes: 250, 355, 450, 560 mm
  • Minimum volume flow rate: 205 – 785 l/s or 738 – 2826 m³/h
  • Maximum volume flow rate, with LWA ≅ 55 dB(A): 410 – 1570 l/s or 1476 – 5652 m³/h
  • Supply air to room air temperature difference: –8 to +12 K

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

00100694_0

 Type
QSH              Displacement flow diffuser

 Actuator
       No entry: chain pull for manual adjustment
B       Bowden cable for manual adjustment
E4       230 V AC, 3-point
E5       24 V AC/DC, 3-point
E6       24 V AC/DC, modulating 0 – 10 V DC
T       Thermal actuator

 Nominal size [mm]
250
355
450
560

 

 Fixing
       No entry: none
W00       With wall mount
K00       With chain fixing (only for variants with chain pull)
WK0       With wall mount and chain fixing (only for variants with chain pull)

 Exposed surface
       No entry: galvanised
P0       Powder-coated RAL 9010, pure white
P1       Powder-coated, specify RAL CLASSIC colour

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Order example: QSH–E5/450/P1-RAL 9016

Actuator

24 V AC/DC, 3-point

Nominal size

450 mm

Fixing

Without

Exposed surface

RAL 9016, traffic white, gloss level 70 %


 

Accessories, Dimensions and weight, Product details

  • Accessories
  • Dimensions and weight
  • Product details
Wall mount (accessory) 00205500_0
① Diffuser
② Centre of diffuser
③ Wall mount, inner part
④ Wall mount, outer part
⑤ Wall bracket


QSH

Nominal size
ØD1
mm
ØD
mm
m
kg
250 252 248 4.8
355 357 353 7.2
450 452 448 9.9
560 562 558 12.8


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Installation preferably at heights between 3.5 m and 10 m
  • Freely suspended installation
  • Vertical duct connection
  • The spigot has to be screw-fixed to the duct and the entire system has to be securely fixed and suspended (by others)
  • Fixing to walls or pillars with optional wall mount
  • Attach the chain fixing and the hand lever of the Bowden cable to the wall or pillar, if necessary


These are only schematic diagrams to illustrate installation details.

Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Outer diameter of the diffuser

m [kg]

Weight

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δtz [K]

Supply air to room air temperature difference

Δpt [Pa]

Total differential pressure


All sound power levels are based on 1 pW.

Share page

Recommend this page

Recommend this page by sending a link by mail.

Fields marked with an (*) are required fields.

Share page

Thank you for your recommendation!

Your recommendation has been sent and should arrive shortly.


Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Contact

We are here for you

Visual contact Visual contact

Please specify your message and type of request.
Tel.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051

Attachment (max. 10MB)

Fields marked with an (*) are required fields.

Contact

Thank you for your message!

Visual contact Visual contact

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.: +44 (0)1842 754545 | Fax: +44 (0)1842 763051