Specifications

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Ducting
A simple 0-5kPa manometer, used to
monitor the air fl ow within ducting used as
part of a dust/chip extractor system (LEV).
The fi tting of a manometer on each “hood”,
e.g. extraction point, is recommended
as a method of daily monitoring of the
system’s performance by the HSE in their
LEV checklist for employers. This unit provides an “at a glance”
monitoring of the system at each extraction point each time it is
used, thus satisfying the requirements under the HSE’s guidance.
These are used by our own Extraction Installation team when
fi tting new systems.
Simple clips to hold the ducting either
suspended from a ceiling or standing out
from a wall. A variety of diameters available.
The clips have an M8 threaded hole. Use M8
threaded plated studding, available in 1m or 3m lengths. Each clip
requires a M8/10 back plate (210502) and M8 studding (410113).
By using studding the ducting can be suspended from the ceiling
at the height required. By using short lengths of studding, ducting
can be mounted directly onto a wall.
With so many saw tables now with
extraction both under the saw and over
the top on the saw guard, it is often the
case that the top guard extraction point
is never used because there is no easy means of joining in the
smaller hose. Here is a simple answer: two galvanised adaptors
which go in line with the 100mm hose and provide a handy
connection for the top guard hose, either 50mm or 38mm.
A short length tube used to join two
fi xtures together. It fi ts over the outside
of the fi xtures (bends , T or Y junctions etc.)
and can be secured either with duct tape,
self-tapping screws or pop rivets. The 100mm comes in
a pack of 5, the other sizes are in packs of 1.
A short length of tube used to join two
lengths of ducting together. It fi ts inside
the duct and can be secured either with duct
tape or short self tapping screws. Pack of 5.
Duct Joiners 100mm (Pkt 5) £13.94 £11.62 410228
Duct Joiner 125mm (ea) £3.05 £2.54 951607
Duct Joiner 150mm (ea) £3.05 £2.54 951608
Duct Joiner 200mm (ea) £3.44 £2.87 951609
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Ducting Joiners
the duct and can be secured either with duct
tape or short self tapping screws. Pack of 5.
self-tapping screws or pop rivets. The 100mm comes in
Fixture Joiner 100mm (Pkt 5) £13.94 £11.62 410232
Fixture Joiner 125mm (ea) £3.05 £2.54 211461
Fixture Joiner 150mm (ea) £2.94 £2.45 211462
Fixture Joiner 200mm (ea) £3.35 £2.79 211463
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Fixture Joiners
To provide a smooth bend
within a duct system. Fits
inside the duct tubing. Use
Fixture Joiners to connect
elbows together.
Steel Elbows
90° Elbow 100mm £9.74 £8.12 410013
90° Elbow 125mm £11.94 £9.95 951601
90° Elbow 150mm £17.45 £14.54 951602
90° Elbow 200mm £23.94 £19.95 951603
45° Elbow 100mm £7.44 £6.20 400499
45° Elbow 125mm £8.94 £7.45 951604
45° Elbow 150mm £12.95 £10.79 951605
45° Elbow 200mm £16.94 £14.12 951606
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Branch Tees are the best way to lead off to
a machine from a duct system. Having a
smooth inner surface and a 45° angle there
is no obstruction to the airfl ow. Also, these
are available in a range of sizes to suit the
duct and machine extraction outlet.
100mm off 100mm at 45° £34.45 £28.71 951618
100mm off 125mm at 45° £34.96 £29.13 951619
100mm off 150mm at 45° £36.46 £30.38 951620
100mm off 200mm at 45° £41.95 £34.96 951621
125mm off 125mm at 45° £36.46 £30.38 951622
125mm off 150mm at 45° £37.45 £31.21 951623
125mm off 200mm at 45° £44.45 £37.04 951624
150mm off 150mm at 45° £45.95 £38.29 951625
150mm off 200mm at 45° £49.45 £41.21 951626
200mm off 200mm at 45° £55.50 £46.25 951627
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Branch Tee
Aluminium blastgates, stronger than
plastic and with a locking screw.
Blastgate for 100mm Hose £7.94 £6.62 340920
Blastgate for 125mm Hose £9.95 £8.29 200071
Blastgate for 150mm Hose £11.45 £9.54 200070
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Aluminium Blastgates
Ducting
Reducing adaptors are for stepping down in ducting size, i.e. from
150mm to 125mm. Available in a variety of sizes. These fi t inside
the ducting for a smooth air fl ow.
100-80mm £11.94 £9.95 410083
100-125mm £11.94 £9.95 410084
150-100mm £14.45 £12.04 410085
150-125mm £13.44 £11.20 510074
180-150mm £20.94 £17.45 951628
200-150mm £17.94 £14.95 951629
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Steel
Reducers
90° and 45° twin bends are used when
splitting the system off, i.e. to lead into
another room or to the other side of a
workshop. Offering a smooth air fl ow
with many advantages over the more usual 90° Tee junction. A
selection of 4 sizes and 2 angles available.
100mm 90° Twin Bend £64.94 £54.12 951630
125mm 90° Twin Bend £72.95 £60.79 951631
150mm 90° Twin Bend £83.94 £69.95 951632
200mm 90° Twin Bend £109.94 £91.62 951633
100mm 45° Twin Bend £46.94 £39.12 951634
125mm 45° Twin Bend £49.94 £41.62 951635
150mm 45° Twin Bend £52.94 £44.12 951636
200mm 45° Twin Bend £64.94 £54.12 951637
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Twin Bends
End caps are used to seal the end of ducting. Useful
to allow an extension at a later date, or to provide a
permanent seal.
End Cap
100mm £3.95 £3.29 211476
125mm £5.04 £4.20 211477
150mm £5.54 £4.62 211478
200mm £7.25 £6.04 951610
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Steel Saw Table
Adaptors
Y Junction 100-50mm £38.95 £32.46 810353
Y Junction 100-38mm £38.95 £32.46 810352
Black GP Hose 38mm x 2.5m £20.95 £17.46 200783
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100mm £4.94 £4.12 211466
125mm £4.94 £4.12 211467
150mm £4.94 £4.12 211468
200mm £6.14 £5.12 211469
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Suspension Rings
Used for mounting suspension rings to ceilings or walls.
8mm x 1m £2.45 £2.04 410113
8mm x 3m £4.44 £3.70 211612
10mm x 3m £6.24 £5.20 211613
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Threaded Plated Studding
Plated back plates for use with all suspension rings. Threaded
M8 and with 2 mounting holes. Use M8 studding to mount the
ducting the appropriate distance from the ceiling or wall.
Back Plate £2.95 £2.46 210502
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M8 Threaded
Back Plate
Manometer, 0-5kPa £89.94 £74.95 210675
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Manometer 0-5 kPa
Available in a variety of diameters to suit all applications. Sections
of duct can be joined together with short joining lengths, which
fi t on the inside of the duct. The perfect solution for extraction
systems.
100mm X 1m Ducting £8.45 £7.04 410229
125mm X 1m Ducting £10.94 £9.12 951611
150mm X 1m Ducting £13.94 £11.62 951612
200mm x 1m Ducting £19.94 £16.62 951613
100mm X 2m Ducting £16.44 £13.70 410230
125mm x 2m Ducting £20.94 £17.45 951614
150mm x 2m Ducting £26.94 £22.45 951615
200mm x 2m Ducting £39.95 £33.29 951616
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Ducting
The most common question asked is what size extractor do I need?
Many manufacturers will state the volume of air required for each
machine in their manual. If not, note the size of the extraction port
and use the chart below
outlet size volume of air reqd
50 200 m³/hr
100 700 m³/hr
125 1100 m³/hr
150 1600 m³/hr
200 2800 m³/hr
Example: for a single machine with a 100mm port an extractor of a
minimum of 700m³/hr will be suffi cient. For multiple machines count
the number of extraction ports per size, multiply the number of each
size by the volume of air required. Then add the results per outlet
size to give you a total volume of air required. This total is for all the
machines operating at the same time. You then must decide which
and how many machines will be used at the same time. Divide the
total volume of air required by this number and add 500m³/hr. Choose
an extractor that gives the airfl ow required by your calculations. Look
at the main inlet size of the extractor, this is the size of the main duct
to be used. In larger systems the ducting should get larger towards
the extraction unit as more machines that are in use are added to
maintain the correct air speed in the duct. This is very important; if the
airfl ow is too low a build up of dust and debris will occur and is a fi re
and explosion risk. If the air speed is high then the system will be noisy
but there will be no deposits in the ducting. Always use blastgates to
close off airfl ow to machines that are not in use.
Basic design
• Keep it simple, don’t over complicate the system
• Keep it straight, ducting runs should all be straight with as few
bends as possible
• Keep transfer duct as big as required by the extractor, this should
get larger towards the extractor
• Keep fl exible duct to a minimum. If the machine cannot be
connected to the system by solid ducting only then should
fl exible ducting be used for the fi nal connection.
• Keep branches joining the duct to a maximum of 45° When
branches join the main duct ideally they must enter at the side
or the top at an angle of a maximum of 45° towards the direction
of fl ow.
• Fit Blastgates to maximise effi ciency and balance the system
The negative pressure inside the ducting draws air into the system.
Incorrect sizing of the duct, too many bends coupled to lots of
fl exible hose induces losses into the system and in badly designed
systems this is akin to leaving the handbrake on in a vehicle.
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Aluminium Blastgates
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