DA 1211 Flange Inlet
Mounting Guide
612301 • 2021-11-05
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DA 1211 Flange Inlet
2 Mounting Guide
Product and Documentation Changes
SKOV A/S reserves the right to change this document and the product herein described without further notice.
In case of doubt, please contact SKOV A/S.
The date of change appears from the front and back pages.
Note
• All rights belong to SKOV A/S. No part of this manual may be reproduced in any manner whatsoever without
the expressed written permission of SKOV A/S in each case.
• All reasonable efforts have been made to ensure the accuracy of the information contained in this manual.
Should any mistakes or imprecise information occur in spite of this, SKOV A/S would appreciate being noti-
fied thereof.
• Irrespective of the above, SKOV A/S shall not accept any liability with regard to loss or damage caused or
alleged to be caused by reliance on any information contained herein.
• Copyright by SKOV A/S.
DA 1211 Flange Inlet
1 Product description........................................................................................................................................4
2 Product survey ...............................................................................................................................................5
2.1 Flange inlet ................................................................................................................................. 6
2.2 Accessories................................................................................................................................ 6
3 Mounting guide.............................................................................................................................................12
3.1 Recommended tools................................................................................................................ 12
3.2 Mounting of sandwich screws................................................................................................ 13
3.3 Wall inlet positioning............................................................................................................... 14
3.4 Mounting inlet ..........................................................................................................................14
3.4.1 Preparing hole in wall................................................................................................................. 14
3.4.2 Mounting the net ........................................................................................................................ 16
3.4.2.1 Net without extension piece ....................................................................................................... 16
3.4.2.2 Net including extension piece .................................................................................................... 16
3.4.3 Mounting using screws .............................................................................................................. 17
3.4.4 Mounting using foam.................................................................................................................. 18
3.4.5 Oblique walls.............................................................................................................................. 19
3.4.6 Final rubber sealant edge .......................................................................................................... 20
3.4.7 Checking the assembly.............................................................................................................. 20
3.5 Mounting the regulation set.................................................................................................... 21
3.5.1 Regulation set with advanced inlet control................................................................................. 21
3.5.1.1 Check the position of the string at advanced inlet control.......................................................... 24
3.5.2 Adjustment of wall inlets ............................................................................................................ 25
3.5.3 Regulation set without advanced inlet control............................................................................ 25
3.6 Mounting of accessories......................................................................................................... 27
3.6.1 Inlet sleeve................................................................................................................................. 27
3.6.2 Air direction plate ....................................................................................................................... 28
3.6.3 Extension rod ............................................................................................................................. 29
3.6.4 Baffle plate ................................................................................................................................. 30
3.6.5 Regulation set for 2 inlets .......................................................................................................... 31
3.6.6 LPV door set for pull rod ø8 ....................................................................................................... 31
3.6.7 Door set for wire drive................................................................................................................ 32
4 Maintenance..................................................................................................................................................33
4.1 Recycling/Disposal .................................................................................................................. 33
5 Technical data...............................................................................................................................................34
5.1 Dimensioned sketch ................................................................................................................ 36
5.1.1 Flange inlet ................................................................................................................................ 36
5.1.2 Light trap complete/outside flange ............................................................................................. 36
5.1.3 Inlet funnel ................................................................................................................................. 37
5.1.4 Inlet Cover.................................................................................................................................. 37
5.1.5 Light trap for inlet cover ............................................................................................................. 38
5.1.6 Fly screen for inlet cover............................................................................................................ 38
Mounting Guide
DA 1211 Flange Inlet
4 Mounting Guide
1 Product description
Flange inlet DA 1211 is a universal wall inlet which is used for ventilating livestock houses with natural, LPV or
Combi-Tunnel ventilation.
The flange inlet can be adapted to wall thicknesses up to 50 cm employing an extension piece. The inlet is fixed
on the inside wall by screws through the flange itself. It cannot be built or cast directly into wall elements.
The Advanced inlet control of the inlets is patent pending and is supplied with a regulation set which makes it
easy to adjust the air inlet in accordance with the current conditions.
The inlet is easy-to-clean due to its open and smooth construction. Also, the thermoplastic stands high-pressure
cleaning. Furthermore, the choice of material makes the inlet resistant to UV radiation. The inlet is made of high-
impact material; it is dimensionally stable and 100% recyclable.
DA 1211 Flange Inlet
Mounting Guide 5
2 Product survey
DA 1211 Flange Inlet
6 Mounting Guide
2.1 Flange inlet
433011 DA 1211 flange inlet 11 cm
433160DA 1211 flange inlet with transp. flap
DA 1211 is used for light constructions. The inlet can be adapted to all stan-
dard wall thicknesses using an extension. The inlet flap is insulated and the
springs are made of stainless steel.
The inlet is supplied with regulation set and parts for Advanced Inlet Con-
trol.
433008 DA 1211B flange inlet 11 cm
DA 1211B is used for light constructions. The inlet can be adapted to all
standard wall thicknesses using an extension. The inlet flap is uninsulated
and the springs are galvanized. Advanced Inlet Control is not possible for
DA 1211B.
The inlet is supplied with regulation set.
2.2 Accessories
433047 DA 1211 extension piece 20 cm
Used for wall dimensions from 12 to 28 cm.
433049 DA 1211 extension piece 30 cm
Used for wall dimensions from 17 to 38 cm.
433051 DA 1211 extension piece 40 cm
Used for wall dimensions from 22 to 49 cm.
433052 DA 1211 extension piece 100 cm
Used for wall dimensions from 50 to 95 cm.
Extension piece is used together with DA 1211 and DA 1211B when the
wall thickness exceeds 11 cm.
An extension piece can as a maximum be divided into two pieces if net is
applied.
433016 DA 1200 net, fine 10x10 mm
The net for DA 1211/1211B is ordered separately. Fine net prevents the
ingress of mice and rats.
Net size 10x10 mm. Self-supporting, but it is recommendable to fasten it
with screws if used together with the extension.
Fine net reduces inlet capacity by approx. 10 %.
One per inlet.
DA 1211 Flange Inlet
Mounting Guide 7
433015 DA net, coarse 65x20 mm
The net for DA 1211/1211B is ordered separately.
Net size 65x20 mm. Self-supporting, but it is recommendable to fasten it
with screws if used together with the extension.
Coarse net does not reduce the inlet capacity.
One per inlet.
433117 DA 1211/1911 net holder set for 25 inlets
The net holder is used for mounting the net when mounting is required on
the outer wall instead of directly on the inlet, for example, at deep window
openings.
Contains 100 pcs.
One set for each 25 inlets.
433043 DA 1211/1911 screw kit f. flange, 10/5 set
Used for mounting of flange inlet. Contains 40 4.8x70 tapping screws.
433025 DA 1200/1900 screw kit f. flange, 10/5 set
Is used for fastening of net in connection with extensions on DA
1211/1211B/1900 inlets. Includes the required number of 5x30 mm stain-
less screws.
One set for each six inlets.
433054 DA 1211 screw kit x 10 f. ceiling mount
Used when DA 1211 is used for Combi-Diffuse.
One set for each 10 inlets.
433112 DA 1200 air direction baffle, short
The air direction baffle is 7.5 cm. Air direction baffle (short/long) can be
used for adjusting the air jet under cold weather conditions and to avoid ad-
hesion on the wall. The baffle is used for all inlets. However, in connection
with 2 rows of inlets the baffle is only required for the top row if the inlets
are placed right above each other.
One per inlet or one for every second inlet.
DA 1211 Flange Inlet
8 Mounting Guide
433114 DA 1200 air direction baffle, long incl. side plate
The air direction baffle is 15 cm and includes side plates. Air direction baffle
(short/long) can be used for adjusting the air jet under cold weather condi-
tions and to avoid adhesion on the wall. The baffle is used for all inlets.
However, in connection with 2 rows of inlets the baffle is only required for
the top row if the inlets are placed right above each other.
Long air direction baffle is applied where the air jet range and Coanda-ef-
fect are particular important, for instance in wide livestock houses.
One per inlet or one for every second inlet.
433014 DA 1200 baffle plate
For reduction of external actions on the DA 1200 or DA 1211/1211B, baffle
plates are offered in connection with one or more of the following condi-
tions:
• The volume of the livestock house is low (narrow and low livestock
house with a flat ceiling)
• In detached wind-affected buildings without windbreaks and the like.
The baffle plate must be mounted on all inlets in the same room and are not
to be used together with Advanced Inlet Control.
The baffle plate increases the requirements to the tightness of the building
and cannot replace external windshield.
The baffle plate does not reduce the inlet capacity.
One per inlet.
560195 DA 1200 regulation set w. long U-shackle
Used where obstacles such as lopsided walls, steel trusses projecting up to
70 mm out from the wall, etc. impede the free movement of the pull rod.
The current system of Advanced inlet control cannot be used with the kit
and therefore an extra string with spring to reduce the slack is included by
which you can make Advanced inlet control.
The inlet flap should as a maximum open to a horizontal position; otherwise
it may overload the winch motor.
One per inlet.
433039 DA 1200 extension piece 240 mm
S433037B DA 1200 extension piece 400 mm, type B
The extension rod is used if you want to run the pull rod round heavy con-
crete pillars or the like, where it is not possible to run the pull rod directly
through the pillar by making a through-going hole. The extension rod is
made of stainless steel.
One per inlet.
401902 DA 1000/1200 single operation set
If individual operation of each inlet is required, DA 1200 single operation
set is mounted.
One per inlet.
DA 1211 Flange Inlet
Mounting Guide 9
401349 All-purpose holder for pull rod
If the distance between the inlets exceeds 2 m, the pull rod will bend down-
wards causing inaccuracies if all-purpose holders are not used.
One unit for each 2 meters free-hanging pull rod.
433021 DA 1200 regulation set for 2 inlets
DA 1200 regulation set for 2 inlets at different heights.
A pull rod row for each row of inlets is preferred and using 433021 should
therefore be regarded as a cheaper alternative.
One for each inlet in the upper row.
413214 LPV door set for pull rod 8 mm
If there are doors or the like in the wall where the inlets are mounted and
you temporarily want to end the pull rod, a special kit containing the neces-
sary parts can be acquired. The kit makes it possible to manually maintain
correct ventilation level and easily reestablish the pull rod.
One per door.
413223 Door set for wire tension
The mounting set is used where the pull rod is directed along the door
frame by means of wire and reels.
One per door.
433065 DA 1211 light trap complete
Used for DA 1211/1211B flange inlet if dimming of light is required.
The light-tightness of the light trap is 99.9 %, corresponding to 20,000 lux
outside and 0.05 lux inside (0.05 lux corresponds to 2.5 ppm).
One per inlet.
433281 DA 1211 external flange
The flange is included in 433065 but can also be mounted on the outside in
connection with DA 1211/1211B flange inlets to
• increase the output to the same level as DA 1200. Correct the number of
inlets, if needed.
• make a nicer finish on the outside of the building and the net can subse-
quently be mounted on the flange.
433281 can be used when the lateral distance between the inlets is 5 cm or
less.
One per inlet.
DA 1211 Flange Inlet
10 Mounting Guide
433066 DA 1200 light trap ex. flange
Used for retrofitting on DA 1200/1211/1211B when the flange is already on
the building and light dimming is required.
The light-tightness of the light trap is 99.9 %, corresponding to 20,000 lux
outside and 0.05 lux inside (0.05 lux corresponds to 2.5 ppm).
One per inlet.
433056 DA 1211 1211 inlet sleeve, SKOV
DA 1211 sleeve can be used in connection with DA 1211/1211B flange in-
let. The use of inlet sleeve ensures a waterproof assembly with a good fin-
ish.
The inlet sleeve is designed to keep drifting snow out and mitigate the effect
of wind on the inlet performance. Also, the inlet sleeve has a certain light
dimming effect.
The mounting of an inlet sleeve does not affect the output of DA
1211/1211B (m3/h).
The inlet sleeve can be used in connection with 433281.
One per inlet.
433058 DA 1211 net for inlet sleeve
The net is used together with 433056 DA 1211 inlet sleeve so that birds are
prevented from entering the livestock house.
When the net is mounted on the inlet sleeve, the output (m3/h) of the air in-
let is reduced by approx. 4% at the same pressure.
One per inlet sleeve.
433155 DA 1200 inlet cover
DA 1200 inlet cover can be used together with the inlets of the DA 1200 se-
ries.
The inlet cover is designed to protect the livestock house against rain/snow
and to provide a certain amount of wind and light dimming effect.
One per wall inlet.
433312 DA 1200 light trap for inlet cover
DA 1200 light trap for inlet is always used together with DA 1200 inlet
cover.
The light trap prevents a large amount of daylight from seeping into the
building ("brown out"). The light trap is made of injection-molded PP
(polypropylene) which is dirt-repellent and easy to clean.
Use one for each DA 1200 inlet cover.
DA 1211 Flange Inlet
Mounting Guide 11
433334 DA 1200 fly screen
DA 1200 fly screen for inlet cover is always used together with DA 1200 in-
let cover.
The fly screen prevents the ingress of flies and the screen is self-support-
ing.
Can only be used for inlets in 1 row.
With regular and sufficient cleaning, the capacity of the inlet is not reduced
by the use of the fly screen.
One per inlet.
433317 Fly screen - 25 m x 1.37 m
Fly screen on a roll prevents the ingress of flies.
With regular and sufficient cleaning there will be no significant pressure
loss, but an emergency opening should be provided via bypass in case the
fly screen is choked.
Use 1 m2 fly screen per 2000 m3/h max. air.
433138 DA 1200 hen net, hinged
The hen net prevents the fledged hens from sitting in the air inlet. The net is
top-hinged, allowing easy access when servicing the inlet.
Screw kit (560333) is ordered separately.
560333 Screw kit DA 1200/1911 hen net
The screw kit is used to mount the hen net.
1 set per hen net.
DA 1211 Flange Inlet
12 Mounting Guide
3 Mounting guide
Check that all ordered parts are present and undamaged prior to starting the work. Read the directions carefully
before starting mounting.
3.1 Recommended tools
See a list of tools recommended for the installation of the flange inlet below.
Item Description
Cordless drill
Jigsaw
Saw
Hammer
Screwdriver
Sealant gun
Marker pen
Tape measure
Spirit level
Water pump (multi-grip) pliers
Utility knife
Chisel
Try square
DA 1211 Flange Inlet
Mounting Guide 13
Item Description
Atomizer
Wedge
Foam gun
Ladder
3.2 Mounting of sandwich screws
To ensure that the screw makes the right thickening and the best possible thread on the back, the correct hole
must be drilled first and the screwing must be done with the correct momentum depending on the thickness of
the metal in the sandwich panel.
Diameter of
screw [mm]
Thickness of metal in
sandwich panel
[mm]
Size of holes in
sandwich panel
[mm]
Tightness
torque
[Nm]
5
0.63 - 0.75 ø3.8 2.5
0.75 - 0.88 ø4.1 3.0
0.88 - 1.00 ø4.2 3.5
1.00 - 1.25 ø4.3 3.5
1.25 - 1.50 ø4.4 4.0
DA 1211 Flange Inlet
14 Mounting Guide
3.3 Wall inlet positioning
The positioning of the inlet in a wall depends on the layout of the building and the house layout. The positioning
may therefore only be made according to directions communicated by SKOV A/S or representatives of the com-
pany.
The inlet must be placed horizontally in the wall. The inlet flap should be pointing into the livestock house.
Place the insulation of the brickwork against the inlet all the way round (like in other categories of constructions).
This way you prevent a cold bridge along the side of the inlet from being formed.
The inlet is fixed on the inside wall by screws directly through the flange itself, see section Mounting using
screws [}17]. In connection with brick and concrete walls, use mounting foam to fix the inlet, see section
Mounting using foam [}18].
3.4 Mounting inlet
3.4.1 Preparing hole in wall
Mark out the correct number of holes according to measurements. Be aware of tolerance.
Distance to coil spring
Min. distance between holes
Min. distance to the wall on the
tensile side, see table below
1200 mm
555 mm
100 mm
xxx mm
*280 mm
280 mm
Distance to the ceiling
*570 mm
265 mm
555 mm
*570 mm
*Including extension
Positioning of actuator Min. distance to the wall on the tensile side
[mm]
Min. 2100 mm
637 mm
637
700 mm 950 mm
1650
Min. 2100 mm
2100
DA 1211 Flange Inlet
Mounting Guide 15
Remember always to use a spirit level.
Drill 4 holes of roughly 10 mm right through the wall.
Cut the holes.
DA 1211 Flange Inlet
16 Mounting Guide
3.4.2 Mounting the net
3.4.2.1 Net without extension piece
Mount the net on the inlet until the click engages.
Push the inlet incl. the net through the hole in the wall.
3.4.2.2 Net including extension piece
Push the extension onto the inlet.
Mount the net on the extension by means of 4 screws.
Push the inlet into wall hole.
DA 1211 Flange Inlet
Mounting Guide 17
3.4.3 Mounting using screws
Make sure that the inlet flap closes tightly: In
case of oblique walls, you have to make sure not to
tighten the screws too much so the inlet frame be-
comes oblique; the inlet flap is then not able to close
tightly, see the section Oblique walls [}19].
Place the inlet in the middle of the hole. Avoid pushing
the inlet into place during mounting.
Drill ø6 mm holes indicated by the center marks in the
outside frame of the inlet.
Use 4 center marks. 2 in the upper flange and 2 in the
lower flange.
Use the holes to mark out holes in the wall.
Center mark or 2 mm hole when mounting in a sand-
wich panel. Material thickness ≤ 1mm.
4 mm hole when mounting in steel profiles.
Material thickness >1 mm ≤ 2 mm.
4.5 mm hole when mounting in steel profiles.
Material thickness >2 mm ≤ 4 mm.
Recommended screw: Tapping screw 4.8x70 A2
Recommended tightening: 5.1 Nm.
Mount the inlet on the wall using screws.
Make sure not to over-tighten the screws as they are
tightened directly against plastic.
DA 1211 Flange Inlet
18 Mounting Guide
3.4.4 Mounting using foam
SKOV A/S recommends using single-component polyurethane foam or similar.
Check before foaming how much the foam expands.
Place the inlet in the middle of the hole. Avoid pushing
the inlet into place during mounting.
Fix it using smooth wedges/distance pieces. Place the
wedges at each end in order not to press the inlet.
Make sure that the inlet flap closes tightly.
Remove the wedges again after pointing.
Point the inlet as shown in the photo. The inlet is
pointed in the entire depth of the inlet in the corners
and approx. 100 mm to each side of the corners. It is
important only to seal the edge in the middle of the inlet
as the joint would otherwise make the inlet skew. We
recommend using a sealant gun.
Wet the joint faces with water from a
mist sprayer before proceeding with
the pointing.
DA 1211 Flange Inlet
Mounting Guide 19
Point the inlet fully by filling the joint 10 mm from the
front edge of the wall.
Push the joint sealer towards the inlet when the sealer
has dried a little to make room for repointing using a
rubber sealer.
Wet the joint with water from a mist sprayer.
Wait until the next day to ensure that the mounting
foam is dry before applying the final rubber sealer, see
the section Final rubber sealant edge [}20]
3.4.5 Oblique walls
If the inside wall is oblique, it may be necessary to
mount a heavy-duty plate or wedges between the inlet
and the wall in order to avoid distortion of the inlet.
It is important to adjust the distortion when mounting in
oblique walls. Otherwise, the inlet flap does not close
tightly after the inlet is inserted.
Place the inlet in the hole and fasten it with 1 screw/
foam in one of the corners. Push the opposite end of
the inlet against the wall in order to check whether the
inlet flap closes tightly.
If this is not the case, the frame of the inlet must be
aligned by means of wedges.
Each time a screw is tightened, check that the inlet flap
still closes tightly. Otherwise, you must adjust the
wedges until the inlet flap closes tightly again.
DA 1211 Flange Inlet
20 Mounting Guide
Remove the redundant part of the wedge when all the
screws have been tightened.
3.4.6 Final rubber sealant edge
SKOV A/S recommends Sikaflex 111 Stick & Seal.
Apply a sealing edge between the inlet and the wall -
both on the inside and the outside.
If the distance between the wall and the edge of the in-
let exceeds 6 mm, sealant tape can be used before
making a sealing edge.
3.4.7 Checking the assembly
Check that all the edges are tight and that the inlet flap
closes tightly at both ends.
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