RFD-V

Runder Frontdurchlass

Runder Anschlusskasten

Innenliegender thermischer Stellantrieb

RFD-V

With low sound power level for comfort and industrial zones, with fixed air control blades and variable internal geometry

Circular swirl diffusers for exposed ceiling installation
Nominal sizes 160, 200, 250, 315
Volume flow rate range 9l/s – 195l/s or 32m³/h – 702m³/h
For variable and constant volume flows
Available in RAL CLASSIC colours
Horizontal duct connection
Plenum box with damper blade and pressure tap
Internal thermal actuator to switch between rapid heating and cooling modes

General Information

Application

Type RFD-V ceiling swirl diffusers are used as supply or extract air diffusers for comfort and industrial zones
Attractive design element for building owners and architects with demanding aesthetic requirements
Horizontal 360° supply air discharge for mixed flow ventilation
The efficient swirl creates high induction levels, thereby rapidly reducing the temperature difference and airflow velocity (supply air)
Designed for freely suspended applications
For variable and constant volume flows
For supply air to room air temperature differences -10 to +15 K

Special characteristics

Low sound power level, ideal for comfort zones
Fixed blades
Diaphragm for volume flow determination
Optional internal lining, closed or open cell
Internal thermal actuator (supply only)

Nominal sizes

160, 200, 250, 315

Construction

Diffuser face finish

P3: Powder-coated RAL9010, pure white, gloss level 20%
P2: Powder-coated RAL9006, white aluminium, gloss level 30%
P4: Powder-coated RAL9005, jet black white, gloss level 20%
P6: Powder-coated in any other RAL CLASSIC colour, gloss level 30%

Plenum finish

0: Natural (unpainted)
P3: Powder-coated RAL9010, pure white, gloss level 20%
P2: Powder-coated RAL9006, white aluminium, gloss level 30%
P4: Powder-coated RAL9005, jet black, gloss level 20%
P6: Powder-coated in any other RAL CLASSIC colour, gloss level 30%

Material and surfaces

Diffuser face made of galvanised steel
Discharge nozzle made of aluminium
Plenum box, non-visible adjustment mechanism and cross bar made of galvanised sheet steel

Standards and guidelines

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

Maintenance

Low maintenance 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

Schematic illustration of the RFD-V

1 Discharge nozzle

2 Swirl element

3 Air distribution element

4 Pressure Diaphragm

5 Retractable sleeve

6 Thermal actuator

7 Spigot damper

8 Lip seal

9 Pressure tap

Ceiling diffusers direct the air from air conditioning systems into the room. The resulting airflow induces high levels of room air, thereby rapidly reducing the airflow velocity and the temperature difference between supply air and room air. Ceiling diffusers allow for large volume flow rates. The result is a mixed flow ventilation in comfort zones, with good overall room ventilation, creating only very little turbulence in the occupied zone.

Type RFD-V ceiling diffusers have fixed blades and an adjustable internal sleeve, allowing for horizontal and vertical air discharge. During cooling air discharge is horizontal and radial, in heating air discharge is vertical. The internal sleeve is controlled with a thermal actuator. The supply air to room air temperature difference may range from -10 to +15K. To give rooms an aesthetic, uniform look. Type RFD-V diffusers may also be used for extract air.

Nominal diffuser sizes	160, 200, 250, 315
Minimum volume flow rate, with Δt_z = -8K	9l/s - 32l/s or 32m3/h - 307m3/h
Maximum volume flow rate with L_WA ≈ 50dB(A)	64l/s - 195l/s or 230m3/h - 702m3/h

Usage instructions

Please note that the minimum volume flows are not valid for free hanging or exposed installation. For these types of installation the minimum flow rate is equivalent to an effective discharge velocity of 3.5m/s

Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures. The minimum volume flow rates apply to a supply air to room air temperature difference of –6 K. The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) with damper blade position 0°.

RFD-V-... (supply air), sound power level and total differential pressure.

Nominal size	q_v [l/s]	q_v [m³/h]	Ø Spigot	Damper blade position
				0⁰		45⁰		90⁰
				Δpₜ [Pa]	L_WA [dB(A)]	Δpₜ [Pa]	L_WA [dB(A)]	Δpₜ [Pa]	L_WA [dB(A)]
160	20	72	158	6	17	7	16	10	17
160	33	118.8	158	15	31	19	31	27	31
160	47	169.2	158	31	41	38	41	56	41
160	60	216	158	51	48	61	48	91	48
200	30	108	198	5	17	7	17	9	17
200	50	180	198	14	32	18	32	26	32
200	70	252	198	28	42	36	42	51	42
200	90	324	198	46	50	60	50	85	50
250	50	180	248	5	20	7	20	10	20
250	80	288	248	14	34	19	34	26	34
250	110	396	248	26	43	36	43	50	43
250	140	504	248	41	50	58	51	81	50
315	70	252	313	5	20	6	20	9	19
315	110	396	313	12	34	16	33	23	33
315	150	540	313	23	43	30	43	42	42
315	190	684	313	36	50	48	50	67	49

Specification text

Swirl diffusers with circular diffuser face. Supply and extract air variants for comfort zones and industrial zones. Diffuser face with fixed control blades and variable internal geometry controlled via thermal actuator. In cooling supply air will discharge in a horizontal swirling pattern creating high induction levels. In heating supply air will switch to vertical discharge to penetrate into the occupied zone. For installation into all types of suspended ceilings and rooms without suspended ceilings. Ready-to-install component which consists of the diffuser face with radially arranged fixed air control blades and a plenum box with side entry, and suspension holes or suspension lugs. The diffuser face is fixed to the cross bar with a central screw. Thermal Actuator temperature range 18 °C to 32 °C. Spigot suitable for ducts to EN 1506 or EN 13180. Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Note: Cooling supply air temperature of <22°C required to reset the thermal actuator

Note: Vertical heating requires supply air temperature of >28°C

Parts and characteristics

Circular diffuser face
Diffuser with radially arranged fixed air control blades
Simple installation of the diffuser due to central rivnut
Damper blade for volume flow rate balancing

Materials and surfaces

Diffuser face made of galvanised steel
Discharge nozzle made of aluminium
Plenum box, non-visible adjustment mechanism and cross bar made of galvanised sheet steel
P2: Powder-coated RAL 9006: 30 %
P3: Powder-coated RAL 9010: 20 %
P4: Powder-coated RAL 9005: 20 %
P6: Powder-coated RAL CLASSIC colour 30 % gloss

Technical data

Nominal diffuser sizes: 160, 200, 250, 315
Minimum volume flow rate, with Δtz = -8K: 9l/s – 32l/s or 32m³/h – 307m³/h
Maximum volume flow rate with LWA ≈ 50dB(A): 64l/s – 195l/s or 230m³/h – 702m³/h

Usage instructions

Please note that the minimum volume flows are not valid for free hanging or exposed installation. For these types of installation, the minimum flow rate is equivalent to an effective discharge velocity of 3.5m/s

RFD-V

–

D12

–

ADE

200

198

–

P6 - RAL 9016

1 Type
RFD-V Swirl diffuser

2 System
Z Supply air
A Extract air

3 Construction
DX Standard

4 Inner lining (insulation)
No entry: without lining
D06 inner lining 6 mm thick
D12 inner lining 12 mm thick

5 Spigot damper for flow rate balancing
M with damper screen

6 Lip seal
No entry: without lip seal
L with lip seal

7 Air distribution element
No entry: without air distribution element
ADE with air distribution element

8 Nominal size [mm]
160, 200, 250, 315

9 Spigot diameter [mm]
158 (only for nominal size 160)
198 (only for nominal size 200, 250)
248 (only for nominal size 200, 250, 315)
313 (only for nominal size 315)

10 Plenum box fixing
No entry: central threaded rod
SB Fixing bracket

11 Exposed surface of diffuser face
P2 powder-coated RAL 9006 (white aluminium)
P3 powder-coated, RAL 9010 (pure white)
P4 powder-coated, RAL 9005 (deep black)
P6 powder-coated, specify RAL CLASSIC colour

12 Surface plenum box
No entry: without surface finish
P2 powder-coated RAL 9006 (white aluminium)
P3 powder-coated, RAL 9010 (pure white)
P4 powder-coated, RAL 9005 (deep black)
P6 powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9006 GU 30
RAL 9010 and RAL 9005 GU 20
All other RAL colours GU 30Order example: RFD-V-Z-DX-D12-M-L/200×198/SB/P3-P6-RAL9016

Type	RFD-V – swirl diffuser
System	supply air
Construction	standard
Inner lining (insulation)	inner lining 12 mm thick
Spigot damper for volume flow rate balancing	with spigot damper
Lip seal	with lip seal
Air distribution element	with air distribution element
Nominal size [mm]	200
Spigot diameter [mm]	198
Plenum box fixing	fixing brackets
Exposed surface of diffuser face	powder-coated, RAL 9010 (pure white)
Surface plenum box	powder-coated, RAL 9016 (traffic white)

Product details

Freely suspended installation of RFD-V

M8 Captive nut provided in top of plenum

Product details

RFD-V NS	160	200	250	315
Ceiling cutout Ød [mm]	299	346	397	551

Thermal actuator function

The RFD-V switches between horizontal and vertical discharge depending on supply air temperature, via a thermal actuator. The diffuser will switch from horizontal discharge to vertical discharge once the supply temperature reaches above 28⁰C. The diffuser will switch back to horizontal discharge from vertical discharge once the supply temperature reaches below 22⁰C.

Volume flow rate balancing

When several diffusers are connected to just one volume flow controller, it may be necessary to balance the volume flow rates.

Ceiling diffusers with plenum box and damper blade

The diffuser face can be removed to access the damper blade
The damper blade can then be set to any position between 0 and 90°, the damper blade can also be adjusted externally using the cam on the spigot.

Volume flow rate measurement

Ceiling diffusers with horizontal plenum box, damper blade and pressure diaphragm allow for volume flow rate balancing with the diffuser face in place.

Connect the pressure tap to the digital manometer
Read the effective pressure
Read the volume flow rate off the characteristic or calculate it
If necessary, adjust the damper blade position

Downloads

product information

Print page RFD-V
Adjustment Data for RFD-V supply air diffusers

RFD-V_PD_2024_04_DE_en 180 KB pdf
Product data sheet RFD-V

RFD-V_PD_2023_07_31_DE_en Product data sheet 940 KB pdf

certificates

Non-CE Manufacturer statement - Type RFD-V

RFD-V_Not_CE_2023_08_10_DE_en | Type RFD-V 670 KB pdf

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RFD-V

With low sound power level for comfort and industrial zones, with fixed air control blades and variable internal geometry

General Information

Technical information

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

Product details

Downloads

product information

Print page RFD-V

Adjustment Data for RFD-V supply air diffusers

Product data sheet RFD-V

certificates

Non-CE Manufacturer statement - Type RFD-V

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE