OPLb

OPLb
OPL
Supply air ramp with micro-filter for operating theatres
QUICK FACTS
○○ Air flow specially designed for operating theatres
○○ Suitable for general surgery
○○ Pressure outlet for filter guard
○○ Easy access to filters
○○ Cleanable
○○ Equipped with microfilter H14
○○ Available in different colours
AIR FLOW - PRESSURE - SOUND LEVEL - AIR VELOCITY
OPL
Velocity through filter
Size
3500 (x2)
0.45 m/s
q (l/s)
650
p (Pa)
110
L(dB(A))
35
This data is valid for a complete installation with two ramps.
OPL
Technical description
Commissioning
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 galvanized 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 9003/NCS S 0500-N. 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 white
RAL 9010.
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 at
www.swegon.com.
Accessories
Filter: 
Micro-filter H14 with rubber seal.
Separation efficiency: 99.995 % @ MMPS, EN 1822.
Size 610 x 610 x 117.
Planning
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. See Figures 1 and 2.
Area of use
Usually used in so-called general surgery, which is simpler operations during daytime where CFU content may be at 50-100
particles / m3. (CFU = number of bacteria-carrying particles per
cubic meter). The supply air ramp provide mixing. This technique has also been shown to provide significantly lower CFU
levels if higher demands on staffing, clothing, air locks etc.
Figure 1. Installation OPL.1. Filter
Installation
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. See Figures 1 and 2.
The figures below show the flow principle and the isovel limit
for 0.2 m/s and Dt -3 K.
Figure 2. Example of installation for optimum performance.
2
Swegon reserves the right to alter specifications.
20150101
OPL
Sizing
• Sound level dB(A) applies to rooms of 10 m2 equivalent
absorption area.
Sound data- OPL - Supply air
Sound attenuation DL (dB)
Table DL
Sound power level Lw (dB)
Table KOK
Size
Size
Mid-frequency (octave band) Hz
OPL
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
Engineering graphs
Mid-frequency (octave band) Hz
OPL
63
125
250
500
1000
2000
4000
8000
3500
15 
9 
2
4
4
6
7
11
Tol. ±
2
2
2
2
2
2
2
2
OPL 3500 - One panel
Supply air - Air flow - Pressure drop - Sound
level
• The graph illustrates data for a single OPL with a microfilter. Two OPL units are normally installed in a room,
in which case the sound level increases by 3 dB.
• The dB(A) values are for rooms with normal acoustic absorption (4 dB).
• The dB(C) value is normally 6-9 dB higher than the
dB(A) value.
• The light area shows recommended working area to
ensure filter efficiency (class H14)
Dimensions and weights
Figure 3. Dimensions and weights.
• Pressure outlet for filter guard.
• The distance A to the suspended ceiling can vary between 100 - 200 mm.
Angle profiles for attaching to the OPL are not supplied
with the unit.
• T = Top edge of duct.
Weights: 166 kg including the filter.
20150101
Swegon reserves the right to alter specifications.
3
OPL
Order key
Product
Supply air ramp
OPL
b
-aaa
Version
Size: 3500
Specification example
SD XX
Swegons supply air ramp for operating theatres, of type
OPLb, having the following functions:
•
•
•
•
•
•
Specially designed spread pattern
Micro-filter
Pressure outlet for filter guard
Painted interior
Can be opened completely for cleaning
Powder coated in white, RAL 9003/NCS S 0500-N
Size:
4
OPLb 3500
Swegon reserves the right to alter specifications.
xx items
20150101
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