Fine Filtration Under Pressure and Vacuum for Demanding Applications

Skytech Ultrafab Candle Filter Sleeves and Bags are precision-fabricated for vertical-leaf candle filter systems widely deployed in pharmaceutical, chemical, beverage, and edible oil industries. Manufactured from woven monofilament or multifilament fabrics in polypropylene, nylon, or PTFE, they provide tight micron-rated particle retention while permitting maximum flow rates. Reinforced top collars and closed bottoms ensure secure fitment on candle frames across all major OEM designs.

What Are Candle Filter Sleeves and Bags?

Candle filters are vertical pressure or vacuum leaf filters in which a tubular filter element (the candle) is submerged in the slurry. The candle sleeve or bag is the filtration medium that fits over each candle frame. Liquid passes inward through the sleeve under pressure or vacuum, depositing a filter cake on the outer surface. At the end of the cycle, the cake is discharged by back-blowing or mechanical vibration.

Features and Benefits

• Precise Micron Retention: Woven monofilament fabric controls aperture size from 5 µm to 500 µm for consistent, repeatable particle capture across all cycles
• Reinforced Collar and Closure: Double-stitched top collar and sealed bottom closure ensure leak-free fitment on candle frames and withstand back-blow pressures
• Chemical Resistance: Polypropylene, nylon, polyester, and PTFE options cover the full pH range from concentrated acid to strong alkali process liquids
• Food-Grade Options: FDA 21 CFR-compliant fabric grades available for edible oil clarification, beverage polishing, and pharmaceutical liquid filtration
• Custom Dimensions: Sleeves manufactured to exact candle diameter and length for all major OEM candle filter designs with no bypass gaps
• High Flow Efficiency: Open monofilament weave provides low flow resistance, maximising throughput per candle frame and reducing cycle pressure drop

Technical Specifications

Applications

• Edible Oil Clarification: Palm, soybean, sunflower, and groundnut oil clarification in candle pressure leaf filters — achieves crystal-clear oil with low filter aid consumption
• Pharmaceutical Liquids: API solution clarification, syrup filtration, and intermediate product polishing under cGMP-compliant conditions
• Beverage Filtration: Beer, wine, and fruit juice clarification using candle filter systems with or without diatomaceous earth filter aid
• Chemical Process: Catalyst recovery, pigment separation, and fine chemical slurry filtration in vertical candle filter vessels
• Sugar Refining: Cane juice and liquor clarification using candle pressure filters with cellulose or perlite filter aid pre-coat

Why Choose Skytech Ultrafab for Candle Filter Sleeves and Bags?

• OEM Cross-Reference: Sleeves fabricated to fit all major candle filter brands including BHS, Larox, BOKELA, and Heinkel — drop-in replacement without frame modification
• Custom Fabrication: In-house cutting, sewing, and heat-welding to produce any candle sleeve geometry within 5–7 working days
• Material Traceability: Full batch traceability on fabric and thread for pharmaceutical and food-grade orders — certificates supplied on request
• 20+ Years Experience: Deep application knowledge in edible oil, pharmaceutical, and chemical candle filtration processes
• Technical Support: Application engineers available to select the optimal fabric, micron rating, and closure design for your specific candle filter system