Wedge wire screen is a type of purifying screen, which is composed of profile wires and support rods. The profile wires are usually triangle wire and the support wire of wedge wire screen can be triangle wire, round bar, flat wire or wedge wire. Wedge wire screen has various types and specs. The type of wedge wire screen is mainly according to the shape of the screen. There are many types of wedge wire screens.
Main types are as follows-
Wedge wire screen with cylinder, panels and nozzle shapes is commonly used in the mine, coal, chemical and water treatment for filtering and screening.
Common Advantages of Wedge wire screens are-Wedge wire screen is prepared with profile wire, woven or welded and support rods. Accordingly, it can distribute into two major types: woven wedge wire and welded wedge wire.
From two basic forms, almost all shapes and sizes can be developed according to the customer’s wish,namely:
The filter elements can be provided with fastenings, reinforcements … In most of these cases a drawing will be submitted to the customer for approval. After welding these accessories to the filter elements,further treatment can be provided to improve the surface quality:
Trislot slot tubes are composed of a surface profile that is spirally wrapped around axial support profiles and attached to each other by resistance welding. These filter elements have the unique advantages 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.
Filter cycle During the filter cycles the solids are deposited on smooth surface. This ‘cake’ acts as an extra filter for finer particles. The fines that sleep through do not get stuck in the conical slots.
Back wash cycle By reversing the flow, the cake and dirt are removed from the filter surface.
| Profile | Support Wires | Min (in mm) |
Min. Slot Width (in mm) |
|---|---|---|---|
| 4S | Q22 or Q25 | 20 | 0.0015[4 |
| 5S | Q22 or Q25 | 20 | 0.0015[4 |
| 6SC | Q22) | 20 | 0.0015[4 |
| 10S | Q25 | 20 | 0.0015[4 |
| 11S | Q22 or Q25 | 21 | 0.0015[4 |
| 12S | Q25 | 21 | 0.0015[4 |
| Q35 | 30 | 0.05 | |
| 18S | 22S or Q35 | 30 | 0.05 |
| 18S | 22S or Q35 | 30 | 0.05 |
| Q25 | 25 | 0.03 | |
| D45 | 300 | 0.2 | |
| 10X3 | 300 | 0.2 | |
| 10X3 | 300 | 0.2 | |
| 22S | 22S or Q35 | 45 | 0.05 |
| D45 or 10X3 or 25X3 | 300 | 0.2 | |
| 28S | Q35 | 215 | 0.2 |
| D45 or 10X3 or 25X3 | 300 | 0.2 | |
| 34S | Q35 | 300 | 0.2 |
| D45 | 300 | 0.2 | |
| 10X3 or 25X3 | 300 | 0.2 | |
| 42S | Q35 or D45 | 300 | 0.2 |
| 10X3 or 25X3 | 300 | 0.2 |
| O.D. (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 |
| 628 | 80 |
| 924 | 80 |
| 924 | 180 |
| Profile | Support wires | Min slot (in mm) |
Standard pitch (in mm) |
|---|---|---|---|
| 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 | 10×3 till 50X3 | 0.15 | 70 |
| Max. surface profile length | Max. suport profile length | |
|---|---|---|
| Pitch 17mm/Profile Q25 | 810mm | 2000mm |
| Pitch 17-22mm/Profile Q35 | 2700mm | 3000mm |
| Pitch 22mm | 710mm | 1650mm |
| Pitch 70 mm | 3000mm | 3500mm |
Trislot welded screens can be used as flat filters or processed to make cylinders.
Curve direction and filtration Direction are to be determined by the customer.
1. “Recently we had a very large international project with a tight and strict schedule. Together with Trislot, we developed the supply plan to meet the project requirements. During production, we had another very good customer submit an emergency Purchase Order which also required the high quality level of Trislot filter elements. Trislot immediately reacted and together we achieved the required delivery of both projects. MAHLE Industrial Filtration sincerely appreciates our relationship and the customer service of this premium quality supplier.”
2.“We have been trading partners with Trislot for many years now, and we hope our partnership can last for many years more. The service and quality we demand would be absolutely unattainable elsewhere. Trislot always provides us with the best answer, even when faced with those ‘unplanned’ moments.”
3.“Trislot® has offered valuable design input, high quality products, and on-time deliveries for PSL for many years. Trislot’s flexible approach to design, excellent technical knowledge and customer focus has forged a valuable partnership between Trislot® and PSL in the pharmaceutical marketplace.”
