Multi-Layer Filter Packs woven or fabricated in 316L Stainless Steel (AISI 316L (1.4404)) keeps its dimensional specification to Extruder screen pack convention; the alloy determines corrosion behavior (superior resistance, including chlorides, brines, food CIP and mild acids) and the service temperature limit (approx. +550 °C continuous). Both are covered below with the full specification table.
Why Choose 316L Stainless Steel for Multi-Layer Filter Packs
The default filtration and process-industry grade. For multi-layer filter packs, this matters when superior resistance, including chlorides, brines, food CIP and mild acids is the controlling requirement.
Alloy Properties
| Grade designation | AISI 316L (1.4404) |
|---|---|
| Magnetic response | Essentially non-magnetic |
| Service temperature | approx. +550 °C continuous |
| Corrosion characteristic | Superior resistance, including chlorides, brines, food CIP and mild acids |
Cleaning & Compatibility
Stainless multi-layer filter packs can be cleaned by backflush, ultrasonic bath, steam and most CIP chemistry. Two cautions: (1) avoid extended contact with hydrochloric acid or hypochlorite sanitizers, which pit even 316; (2) where the mesh contacts carbon steel during fabrication or service, iron pick-up can rust-stain the surface — specify passivation after fabrication.
Comparable Alloys
Below 316L sits 304 (general purpose, lower cost). Above it: duplex 2205 (strength + chloride resistance), 904L and Hastelloy C-276 (hot chlorides, sulfuric), Monel 400 (HF, seawater), titanium (chlorides at minimum weight) for multi-layer filter packs.
Specifications of Multi-Layer Filter Packs Available in 316L Stainless Steel
| Diameter (mm) | Mesh / micron options | Layers | Edge treatment | Reference standard |
|---|---|---|---|---|
| 20 | Coarse guard + fine + support | 3 | Spot welded | Extruder / SPM pack |
| 38 | Coarse guard + fine + support | 3-5 | Spot welded | Extruder / SPM pack |
| 50 | Coarse guard + fine + support | 3-5 | Bound rim | Extruder / SPM pack |
| 90 | Coarse guard + fine + support | 5-7 | Bound rim | Extruder / SPM pack |
| 155 | Coarse guard + fine + support | 5-7 | Bound rim | Extruder / SPM pack |