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Trislot - Radial External Wire
These tubes are composed of a surface profile wire that is spirally wrapped around axial support profiles and attached to each other by resistance welding.
The direction of the filtering flow determines the position of the surface profiles in relation to the support profiles.
- The flat side of the surface profile is on the outside of the tube when the flow is from out to in (FOTI)
- The flat side of the surface profile is on the inside of the tube when the flow is from in to out (FITO). This is also called a reversed profile.
The designation of a slot tube with radial external wire 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 around 360°
Variable slot openings are possible on all diameters
Continuous cylinders: by using a lot of support profiles, an axial slot can be obtained. These filter elements are called continuous cylinders.
Optional finish for the slot tubes:
- Degreasing and pickling
- Fastening of loose profile ends
- Post machining for tighter tolerances