Candle Filter Sleeves / Bags
Overview
Candle filter sleeves and bags are tubular filtration elements designed to fit over perforated metal candle-shaped supports in vertical pressure filters or backwashable filter systems. These sleeves play a critical role in clarifying, polishing, and solid-liquid separation processes across industries such as pharmaceuticals, food and beverage, chemicals, petrochemicals, and wastewater treatment.
At Filtech Textiles, we manufacture premium-quality, custom-fit candle filter sleeves and bags designed for consistent performance, long service life, and compatibility with various filtration systems including backflush, blowback, and vibratory cleaning mechanisms.
Design & Construction Features
- Form: Tubular sleeves, open at one end (bottom sealed or welded)
- Fixation Options:
- Elasticated collars
- Snap bands
- Hook and loop (Velcro)
- Tie-string or stitched flanges
- Construction:
- Double-stitched seams
- Thermally bonded edges for minimal fiber release
Types of Filter Media Used in Candle Filter Sleeves / Bags
| Material | Micron Rating | Advantages | Limitations |
|---|---|---|---|
| Polypropylene | 1 – 200 µm | Chemically inert, cost-effective, good cake discharge | Max temperature ~90°C |
| Polyester (PET) | 1 – 100 µm | Excellent mechanical strength, temp-resistant up to 150°C | Moderate acid resistance |
| Nylon Monofilament | 10 – 150 µm | Smooth finish for easy cleaning, reusable | Not suitable for strong acids |
| PTFE (Teflon) | 1 – 25 µm | Outstanding chemical resistance, withstands 260°C | High cost |
| Metallic Mesh (SS316L) | 1 – 100 µm | Reusable, robust under high pressure | High initial cost, less flexible |
Applications of Candle Filters
Pharmaceuticals: API purification, sterile filtration, crystallization
Chemicals: Catalyst recovery, salt slurry clarification, resin washing
Food & Beverages: Edible oil polishing, flavor extract purification
Petrochemicals: Fuel & oil polishing, additive recovery
Water Treatment: Activated carbon retention, sludge separation
Coatings & Paints: Removal of pigments, gels, and resin agglomerates
⭐ Why Choose Filtech Textiles?
- 🧪 Available in broad micron ratings for polishing to coarse filtration
- 🧵 Constructed with minimal bypass for maximum filtration efficiency
- ⚗️ Engineered for resistance to high temperatures and aggressive media
- 🛠️ Custom sizes and shapes to fit OEM and legacy filtration equipment