Filter Press Plates
Plate configuration--the selection of the correct filter element--is absolutely critical to filtration applications. Among determinant factors in plate configuration are cake thickness and filtration area, the temperature of the filtrate, the need (or lack of need) for temperature control, volatility of the filtrate, viscosity, and so on. The particular combination of these factors in any application will determine compatible materials of construction. Cost is also a consideration here. The multiplicity of factors inherent in any application makes flexibility of plate construction material a real advantage to anyone designing a filtration system.
Pressure/Temperature Chart
The pressure chart is a guideline for filtration or wash pressures at certain temperatures.
Temperature differentials during a cycle of more than 20 degrees F can induce thermal shock and plate failure.
Chemical composition of the slurry can reduce operating
parameters of filter plates. Contact the factory for chemical resistance guidance.
Available Materials
Listed below are the materials from which D. R. Sperry manufacturers filter press plates. The charts indicate current Sperry plate patterns by plate style, material, and size of filtration area. These charts reflect standard Sperry plates and do not include special plates which Sperry can produce and which may be indicated for your application.
| Cast Iron | Aluminum (steam-heated) Teflon ® coated |
| Cast Iron (steam-heated) | Polypropylene |
| Cast Iron-Heresite ® coated | 10% glass-filled Polypropylene |
| Cast Iron-galvanized | Hi-temp glass-filled Polypropylene |
| Cast Iron-lithcote | Hastelloy ® B (heat-treated) |
| 304 Stainless | Hastelloy ® C |
| 304 Stainless (steam-heated) | Ductile Iron |
| 316 Stainless | Ni Resist |
| 316 Stainless (steam-heated) | Kynar ® PVDF |
| Cast Iron-nickel coated | Bronze |
| Aluminum | Nickel Iron |
| Aluminum (steam-heated) | CI-Firmacoat |