• Perforated Metal Series

  Normal Perforated Sheet Decorative Perforated Sheet Decorative Laser Cutting Sheet Laser cutting metal parts Micro Hole Etched Metal Perforated tube

  Perf Metal Planks & Grating

  Perforated Metal Gratings Steel Bar Grating

  Expanded Metal Series

  Standard expanded metal Flattened expanded metal Expanded Metal for building facade or fence DVA Mesh

  Woven Wire Mesh Series

  Security Screen Stainless steel wire mesh & wire cloth Hand woven Rope Mesh Brass wire mesh Crimped Wire Mesh Black wire cloth Architectural Woven Mesh

  Johnson Screen

  Wedge Wire Screens Flat Welded Screens Johnson Screen Slot tubes V wire wrap screen Screen Support Grids Water Well Screen Wedge wire screen cylinders Johson Screen for Architecture & Construction

SLOT TUBES

Slot tubes have the construction of welding with the support profiles being rods in the axial direction of the tube and the surface profiles spirally wound around the support profiles.

Standard constructions of slot tubes
The designation of a slot tube could describes its construction as follows:
surface wire / support wire x number of support wires.
Example: 12S/Q25 x 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. 
Slot Tubes Special features

Reversed profile
Slot tubes with normal construction 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. 
Slot tubes with dimensions and/or tolerances other than those described below, are available on request. 
Slot Tubes Special features

* 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.
Profile combinations

Surface Profiles	Support Profiles	Min. diam. in mm	Min. slot width in 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	10x3	300	0.20
22S	22S or Q35	45	0.10
22S	D45 or 10x3 or 25x3	300	0.20
28S	Q35	215	0.20
28S	D45 or 10x3 or 25x3	300	0.20
34S	Q35	300	0.20
34S	D45	300	0.20
34S	10x3 or 25x3	300	0.20
42S	Q35 or D45	300	0.20
42S	10x3 or 25x3	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