Sentinel filter bags

Summary

Product Identification

The SENTINEL® Filter Bag Range offers a bypass-free filter bag construction, available in polypropylene and polyester.

Key features and benefits include:

• Fully-welded construction with patented SENTINEL seal ring provides 100% bypass-free filtration.
• Pressure-activated SENTINEL seal ring offers a flexible, chemically resistant seal that adapts to any bag filter housing.
• Material is free from silicone and crater-forming substances.
• Special surface treatment significantly reduces fiber release.
• Stable and flexible welded seams adapt to the restrainer basket.
• Handles in the ring make replacing the filter bag quick and easy.
• An insertion tool is recommended to facilitate insertion and ensure correct alignment within the restrainer basket.

These filter bags are suitable for a wide range of applications, including the filtration of paints and varnishes, inks, chemicals, and process water.

Operating Limits

• Max. operating temperatures:
  • Polypropylene: 90 °C
  • Polyester: 150 °C
• Max. differential pressure: 2.5 bar
• Recommended change-out pressure for disposal: 0.8 – 1.5 bar (depending on application requirements)

Mechanical / Hydraulic

• Materials:
  • Filter media: Needle felt polypropylene or polyester
  • Seal rings: Welded polypropylene or polyester SENTINEL seal ring
• Retention ratings: 1, 5, 10, 25, 50, 100, 200 µm
• Dimensions/Parameters:
  • Size 01:
    • Dimensions: Ø 180 x 430 mm L
    • Filter area: 0.24 m²
    • Max. flow rate: 20 m³/h (for liquids with a dynamic viscosity of 1 mPa·s @ 20 °C)
  • Size 02:
    • Dimensions: Ø 180 x 810 mm L
    • Filter area: 0.48 m²
    • Max. flow rate: 40 m³/h (for liquids with a dynamic viscosity of 1 mPa·s @ 20 °C)
  • Size 03:
    • Dimensions: Ø 100 x 230 mm L
    • Filter area: 0.08 m²
    • Max. flow rate: 6 m³/h (for liquids with a dynamic viscosity of 1 mPa·s @ 20 °C)
  • Size 04:
    • Dimensions: Ø 100 x 380 mm L
    • Filter area: 0.16 m²
    • Max. flow rate: 12 m³/h (for liquids with a dynamic viscosity of 1 mPa·s @ 20 °C)

Ordering Information

Ordering is based on a structured code system. Key parameters for selection include:

• Materials:
  • PO: Needle felt polypropylene
  • PE: Needle felt polyester
• Seal rings:
  • E: Welded polypropylene SENTINEL seal ring
  • H: Welded polyester SENTINEL seal ring
• Sizes: 01, 02, 03, 04 (with specific dimensions as listed above)
• Retention ratings: 1, 5, 10, 25, 50, 100, 200 µm
• Cover layer: P (Plain)
• Packaging: 30 (Filter bags/box), with S, M, L indicating box sizes.
• Options:
  • A: Individually packed
  • L: Standard filter bags with increased length
  • S: Stitched side/bottom; welded SENTINEL seal ring

See the official PDF for exact tabulated values and full ordering codes.

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Disclaimer: This summary is based on the extracted text and may not include all figures, footnotes, or the latest revisions. Contractual data should always match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror