Johnson Wedge Wire Water Well Screen Strainer, Metal Ring Wire Wrapped Base Pipe

Reversed profile

finished

Variable slot opening

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.

Standard finish
grinding of end surfaces
removal of loose profile ends
degreasing and pickling
Optional finish
fastening of loose profile ends
removal of burs of profile ends
post machining for tighter tolerances

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.