Water Well Screen, Wedge Wire Screen, Johnson Screen Tube manufacturer / supplier in China, offering Perfect Roundness Slot Tubes / Water Well Screen, Stainless Steel Screen Tube, Well Pump Screen Pipe, Well Drilling Wedge Well Screen Tube and so on.
|Min. Order / Reference FOB Price||30 Meters||US $30/ Meter|
|Production Capacity:||300m Per Day|
|Transport Package:||Pallet, or Container|
|Payment Terms:||L/C, T/T, D/P, Paypal, Money Gram, Western Union|
perfect roundness Slot tube 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.
perfect roundness Slot Tube 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 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.
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.
Variable slot opening
For special purposes variable slot openings are possible for all diameters.
By using a lot of support profiles, an axial slot can be obtained.
These filter elements are called continuous cylinders.
See support tubes.
grinding of end surfaces
removal of loose profile ends
degreasing and pickling
fastening of loose profile ends
removal of burs of profile ends
post machining for tighter tolerances
|Surface Profiles||Support Profiles||Min. diam. in mm||Min. slot width in mm|
|11S||Q20 or Q25||23||0.030|
|18S||22S or Q35||30||0.050|
|22S||22S or Q35||45||0.10|
|22S||D45 or 10x3 or 25x3||300||0.20|
|28S||D45 or 10x3 or 25x3||300||0.20|
|34S||10x3 or 25x3||300||0.20|
|42S||Q35 or D45||300||0.20|
|42S||10x3 or 25x3||300||0.20|
|Outside diameter in mm||Number of support profiles|
± 0.030 mm
(max. ± 0.030)
± 0.1 mm
(max. ± 0.2)
for O.D. ≤ 300 mm
for O.D. > 300 mm
± 0.3 mm
± 0.5 mm
± 2.5 mm
Ø < 164 mm
164 < Ø < 300 mm
Ø > 300 mm
± 2 mm
± 4 mm
Ø ≤ 300 mm
Ø > 300 mm