Trislot

Flat screens

Trislot flat screens are flat filter surfaces that can be manufactured in two different ways.

Welded screens: directly made on the flat welding machine
Flattened slot tube: manufactured by opening and flattening a slot tube with radial external wire

Welded screen

Trislot welded screens are produced directly on a machine by welding surface profiles onto support profiles at each intersection at 90° angles.

Advantages of manufacturing directly on a machine:

Enhanced profile wire flatness: no profile wire waviness between support wires
Avoids the weakening of the welds and the chance of stress corrosion that can result when producing from a slot tube
Accurate distance between support profiles
Possibility of different support wires in one screen
Flexibility to have variable spacing between support wires in one screen

Flattened slot tube

Depending on the required specifications, we can also opt to produce from a slot tube. Subsequently the tube is split open, flattened and cut to the required size.

Possibilities

The designation for a flat screen is as follows:

Surface wire / Support wire – distance between the support wires (center to center) also called the pitch
Example: 22S/10×3 – 70

This means that the profile wire is 22S. The support wire is 10×3 and the pitch, space from center to center of the support wire, is 70 mm.

Standard constructions (1)

Profile	Support wires	Min.slot	Standard pitch (P)
		in mm.	in mm. (2)
11S	Q25	0.03	17/22
12S	Q25/Q35	0.03	17/22
	10X3	0.1	17/25
18S	Q35	0.05	17/25
	Q35/10X3/25X3	0.1	25/70
22S	Q35	0.05	17/25
	Q35/10X3 till 50X3	0.12	25/70
28S	Q35/10X3 till 50X3	0.15	17/25/70
34S	Q35/10X3 till 50X3	0.15	17/25/70
42S	Q35/10X3 till 50X3	0.15	17/25/70
50S	10X3 till 50X3	0.15	70