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Sperry - Model Lug -Specialized Lug Style Filter Press Plates for Shellac Processing - Material Options and Chemical Resistance
The Sperry Model Lug filter press plates are a specialized type of flush plate and frame designed for applications that require frequent changes of filter media, such as the processing of shellac. These lug style plates simplify media alignment, reducing labor and enhancing operational efficiency. The pressure/temperature chart provides guidelines for filtration or wash pressures at various temperatures. Note that temperature differentials exceeding 20 degrees F during a cycle can cause thermal shock and plate failure. Additionally, the chemical composition of the slurry can impact the operating parameters of the filter plates; consult the factory for guidance on chemical resistance. Available in a variety of materials, including cast iron, stainless steel, aluminum, and high-performance polymers, these plates can be customized to meet specific application requirements. Standard materials include cast iron (with various coatings), stainless steel (304 and 316), aluminum, polypropylene, and specialized alloys like Hastelloy B and C.
- 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.
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
