Swegon Indoor Climate Systems 2004 - Air distribution products - Rev. 29 January, 2007
www.swegon.comOPLb
Supply air ramp with micro-filter
for operating theatres
FUNCTION
The OPL is a supply air ramp with five perforated diffuser sections and two micro-filters. The ramps are installed in pairs in the ceiling and are specially designed for ventilating operating theatres. The positioning of the panels in relation to each other and the different directions of air from the diffuser sections ensures a clean zone of filtered air together with low air velocities in the area around the patient. It is used with constant airflow and a constant under-temperature, operating without induction of contaminated room air.
QUICK FACTS
- Air flow specially designed for operating theatres
- Pressure outlet for filter guard
- Easy access to filters
- Cleanable
- Micro-filter with rubber seal
- Available in different colours
QUICK GUIDE
AIRFLOW - PRESSURE DROP
SOUND LEVEL - AIR VELOCITY | | |
|
| | Velocity through filter |
Size | | 0.45 m/s |
3500 (x2) | q (l/s) | 650 |
| Dp (Pa) | 110 |
| LA (dB(A)) | 35 |
|
This data is valid for a complete installation with two ramps. | | |
DESIGN
The supply air ramp consists of two filter boxes containing micro-filters with rubber seals. The connecting section to the duct system has a spigot sealed with a rubber ring. There are five perforated diffuser panels under the connecting section and the two filter boxes. Each of the panels is attached with hinges and can thus be opened easily. All five panels have a fixed spread pattern to obtain the cleanest possible zone of air around the operating table.
MATERIALS AND SURFACE TREATMENT
The whole unit is manufactured in galvanised sheet steel, including the connecting section. The filter boxes and the diffuser panels are painted inside and outside with our pure white standard paint, RAL 9010. The unit is also available in other standard colours: Dusty grey 7037, white aluminium RAL 9006, jet black RAL 9005, grey aluminium RAL 9007 and signal white RAL 9003 (NCS 0500).
ACCESSORIES
Filter:
Micro-filter H14 with rubber seal.
Separation efficiency: 99.995% @ MMPS, EN 1822.
Size 610 x610 x 117.
PLANNING (See Figures 1 and 2)
The supply air ramps are installed in pairs parallel to the operating table. The distance between the panels can vary between 2200 -2600 mm. These stipulations are to ensure the optimum air distribution within the operating zone. The remaining parts of the ramps, i.e. the filter boxes and the connecting section, are installed above the suspended ceiling. The underside of the ramp must be at least 100 mm from the underside of the suspended ceiling. The filters is removed through the outer diffuser faces. Units for the evacuation of exhaust air should be placed at low level in the room but at least 150 mm from the floor. To control the flow of air in the room it is recommended that flow control products such as a DCV regulator or flow control are used in the duct system before the ramps.
INSTALLATION (See Figures 1 and 2)
The supply air ramp is fitted with reinforced eye bolts for attaching to the ceiling (see dimensions diagram). Angle brackets for attaching to the suspended ceiling are not supplied with the ramp. The ramps are installed centrally/symmetrically in the room on both sides of the operating table and parallel to it. To achieve the conditions described in the technical data, the underside of the ramps must be between 2400 - 2800 mm above the floor and the distance between the two ramps in the ceiling must be between 2200 - 2600 mm.
Figure 1.Installation OPL.
1. Filter
Figure 2.Example of installation for optimum performance.
The figures below show the flow principle and the isovel limit for 0.2 m/s and Dt -3°.
COMMISSIONING
It is recommended that the air flow is adjusted with the aid of flow control products. These are placed in the duct system before the supply and exhaust air units in the operating theatre. There is a pressure outlet for the filter guard on the OPL.
MAINTENANCE
The filter is replaced by opening the diffuser panels and slackening the attachment screws. The entire unit can be cleaned when necessary using alcohol. All the diffuser panels can be opened and have hinges and quick-lock devices. The recommended final pressure drop over the filter is 200 Pa or twice the initial pressure drop.
ENVIRONMENT
The declaration of construction materials is available on our website.
TECHNICAL DATA
- Sound level dB(A) applies to rooms of 10 m2 equivalent absorption area.
Sound data- OPL - Supply air
Sound power level Lw(dB)
Table KOK
|
Size | Mid-frequency (octave band) Hz | | | | | | | |
OPLb | 63 | 125 | 250 | 500 | 1000 | 2000 | 4000 | 8000 |
3500 | 6 | 3 | 0 | 2 | 1 | -9 | -17 | -18 |
Tol. ± | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
|
Sound attenuation DL (dB)
Table DL