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Profile Wire Slotted Tubes

General Construction Drawing

Slot tubes are welded structures with the support profiles being rods in the axial direction of the tube and surface profiles spirally wound around the support profiles.

Slot Tubes are manufactured directly on a machine. They have the unique advantage of very accurate, narrow slot openings and perfect roundness all in one. Slot tubes can be provided with the necessary end pieces for attachments and/or reinforcements.

Standard constructions of slot tubes (special constructions are possible on request) The designation of a slot tube describes its construction as follows:

surface wire / support wire × number of support wires.Example: 12S/Q25 × 8.

This means that the profile wire is 12S. The support wire is Q25 and there are 8 support wires, equally spaced over 360°.

Slot tubes with dimensions and/or tolerances other than those described below, are available on request.

Profile Wire Slotted Tubes

Profile combinations

Surface Profiles Support Profiles Min. diam. mm Min. slot width mm
10S Q25 21 0.10
11S Q20 or Q25 23 0.030
12S 22S 30 0.050
12S Q25 23 0.030
12S Q35 30 0.050
18S 22S or Q35 30 0.050
18S Q25 25 0.030
18S D45 300 0.20
18S 10 × 3 300 0.20
22S 22S or Q35 45 0.10
22S D45 or 10 × 3 or 25 × 3 300 0.20
28S Q35 215 0.20
28S D45 or 10 × 3 or 25 × 3 300 0.20
34S Q35 300 0.20
34S D45 300 0.20
34S 10 × 3 or 25 × 3 300 0.20
42S Q35 or D45 300 0.20
42S 10 × 3 or 25 × 3 300 0.20

Diameters

Outside diameter in mm Number of support profiles
30 8
45 10
57 12
70 18
85 18
97 20
110 24
137 30
164 36
215 48
268 48
305 40
380 48
460 60
510 64
625 80
914 180

Standard tolerances (tighter tolerances are possible on request through the use of special techniques).

Slot Size: ± 0.030mm
(max. ± 0.030)
± 0.1mm
(max. ± 0.2)
for O.D. ≤ 300mm

for O.D. > 300mm
Diameter ± 0.3mm
± 0.5mm
± 2.5mm
Ø < 164mm
164 < Ø < 300mm
Ø > 300mm
Length ± 2mm
± 4mm
Ø ≤ 300mm
Ø > 300mm

Special features:

Profile Wire Slotted Tubes
Profile Wire Slotted Tubes

Reversed profile

Normal construction of slot tubes allows for flow out to in filtration. However, flow-in -to-out constructions are also possible.

This construction can also be used when the slot tube is used as support tube for another filter medium, so that only the wedge is in contact with the medium to increase the open area. It is can be always found in filtration solution.

Variable slot opening

For special purposes variable slot openings are possible for all diameters.

Continuous cylinders

By using a lot of support profiles, an axial slot can be obtained. These filter elements are called continuous cylinders.

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