Pall Dia Filtroplast Filter Elements

Summary

Product Identification

Pall Dia-Filtroplast filter elements are constructed from High Density PolyEthylene (HDPE). They feature a coarse-grained support body coated with a thin, fine filtering polyethylene membrane, which are strongly sintered together to form an integral, abrasion-resistant unit. These barrier filter elements are designed to be backflushed, even at high pressures.

Applications

• Backwashable surface filter for liquids:
  • Polish filtration of cell brine in chlor-alkali electrolysis (membrane or diaphragm process).
  • Polish filtration of concentrated salt solutions (e.g., NaCl, KCl, MgCl₂).
  • Catalyst recovery from reactive solutions (e.g., in hydroxylamine production).
  • Removal of suspended particles from pure water.
• Backpulsable surface filter for gases:
  • Recovery of valuable substances.
• Suction Device:
  • Dust separation in sacking plants.

Chemical Resistance

Dia-Filtroplast filter elements exhibit excellent chemical resistance. They are hydrophobic and do not swell in water. The media resists alcohol, aliphatic hydrocarbons, organic fluids (e.g., oil), strong alkalies, acids, and saline solutions. Chemical cleaning with sodium hypochlorite (NaOCl) or hydrochloric acid (HCl) is possible. Users are responsible for verifying compatibility with specific end-use conditions.

Operating Limits

• Maximum Backflushing Pressure: 6 bar
• Maximum Temperature: 70 °C

Technical Specifications

• Filtration Grade for Liquids: <1 µm
• Porosity Grade for Support: 40 %
• Material Density: 0.55 g/cm³
• Specific Permeability (air): 90 x 10⁻¹³ m²
• Specific Permeability (water): 25 x 10⁻¹³ m²
• Thermal Expansion Co-efficient (25 - 70 °C): 2 x 10⁻⁴/K
• Dimensions (Outer Diameter / Inner Diameter): 70 / 40 mm

Mechanical / Hydraulic

• Connection parts are custom manufactured on demand.
• All connection parts are manufactured from Polyethylene.
• Gaskets are manufactured from EPDM (standard).
• The document includes charts illustrating differential pressure vs. face velocity for both air and water flow at 20 °C. See the official PDF for exact tabulated values.

Ordering Information

Pall Dia-Filtroplast filter elements are available in several configurations, including filter candles with pin fixation, flanged filter candles, and suction devices. Standard options typically feature an outer diameter of 70 mm and an inner diameter of 40 mm, with various lengths, surface areas, and weights. Custom dimensions and special products are available upon request.

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Disclaimer: This summary is based on extracted text and may not include all figures, footnotes, or the latest revisions from the original PDF datasheet. For contractual data, please refer to the specific OEM PDF revision used on your project.

Official datasheet (PDF)

Lenntech datasheet mirror