Stainless Steel Ring Multi-Finger Bags for High-Flow Industrial Filtration

Skytech Ultrafab SS Ring Finger Bags combine a precision-machined stainless steel retaining ring with multi-finger woven or membrane filter fabric, providing a high-surface-area, leak-free filtration element for industrial bag filter housings. The SS ring ensures a positive, vibration-resistant seal against the vessel tubesheet, while the finger geometry multiplies filtration area — delivering reduced pressure drop, extended service life, and higher throughput in paint, chemical, water treatment, and resin filtration.

What Is an SS Ring Finger Bag?

An SS Ring Finger Bag is a filter element consisting of a machined stainless steel ring (equivalent to a P1 or P2 ring but in SS) from which multiple fabric fingers extend downward into the bag filter housing. The SS ring provides superior rigidity, sealing force, and corrosion resistance compared to PP rings — essential in high-temperature, chemically aggressive, or high-pressure filtration applications. The finger construction increases filtration area 3–5× over a single bag of the same ring diameter.

Features and Benefits

• Machined SS 304/316L Ring: Precision-machined SS 304 or 316L retaining ring provides tight, crevice-free seal against the filter housing tubesheet — withstands elevated temperature, chemical attack, and mechanical vibration
• Multi-Finger Filtration Area: Two to four fabric fingers per ring increase filtration area 3–5× compared to a standard single bag of the same ring diameter — directly extending service intervals
• Compatible with Standard Housings: SS ring machined to P1 or P2 standard dimensions for direct installation into all standard single and multi-bag filter housings without modification
• Wide Fabric Range: Fingers available in woven PP, PES, nylon monofilament, and PE membrane — any micron rating from 1 µm to 500 µm for the specific filtration requirement
• Welded or Sewn Seams: Finger-to-collar seams ultrasonically welded or sewn with chemically resistant thread for zero-bypass at the highest stress point of the finger bag assembly
• High Temperature Rating: SS ring withstands process temperatures up to 150°C (PES fabric) — suitable for hot paint, adhesive, and chemical process applications where PP rings would deform

Technical Specifications

Applications

• Paint and Coatings: High-temperature solvent-borne paint filtration where SS rings withstand elevated fluid temperatures that would deform standard PP rings
• Chemical Process: Corrosive chemical liquid filtration in SS housings requiring matched SS ring material for full corrosion resistance
• Resin and Adhesive: Hot-melt adhesive and elevated-temperature resin filtration where PP ring deformation would cause bypass and unfiltered product reaching downstream operations
• Water Treatment: High-flow industrial water and process water pre-filtration where multi-finger area reduces bag change frequency and maintenance cost
• Industrial Lubricants: Hydraulic oil, gear oil, and lubricant filtration at elevated fluid temperatures — SS ring and PES finger combination covers the full service condition

Why Choose Skytech Ultrafab for SS Ring Finger Bag?

• SS Ring for Maximum Seal Integrity: Machined SS ring provides 3–5× greater sealing force versus PP ring alternatives — eliminates the most common failure mode in high-temperature and high-pressure bag filtration
• Area Advantage: Multi-finger design delivers 3–5× the filtration area of a standard bag — directly cutting pressure drop, extending change intervals, and reducing total bag consumption
• Custom Finger Configuration: Any ring size, finger count, finger length, and fabric type produced from specification — no standard-size limitation on the engineering
• SS 316L for Aggressive Service: 316L ring option for chemical and marine applications where chloride or acid contact would corrode SS 304 — full corrosion resistance matched to the housing material
• Fast Delivery: Standard P1/P2 ring sizes with common fabric types produced in 7–10 working days; custom ring diameters in 12–15 working days