Star-Profile Filter Bags for Maximum Area in Compact Dust Collectors

Skytech Ultrafab Star Filter Bags are multi-lobe, star-shaped filter elements that pack substantially greater fabric surface area into a standard cylindrical dust collector housing compared to conventional round bags of the same diameter. The star cross-section — typically 4, 6, or 8 lobes — increases the filtration area by 2–4× within the same collector footprint, delivering lower air-to-cloth ratio, reduced pressure drop, longer pulse-cleaning intervals, and extended bag service life in industrial dust collection applications.

What Is a Star Filter Bag?

A Star Filter Bag is a cylindrical filter bag where the cross-sectional shape is a multi-pointed star rather than a simple round circle. The star profile is achieved by inserting a rigid star-shaped wire cage inside the bag during installation, which holds the fabric in a lobed star configuration as the collector draws air through. Each lobe of the star presents additional filtration area — a 6-lobe star bag installed in a standard 150 mm diameter position may present 3–4× the fabric area of a standard round bag at the same diameter.

Features and Benefits

• 2–4× Filtration Area: Star cross-section increases filtration area 2–4× compared to a round bag in the same collector position — directly reducing air-to-cloth ratio and extending pulse-cleaning intervals
• Lower Air-to-Cloth Ratio: Greater fabric area per position means less air velocity through the fabric — reduced pressure drop, lower dust penetration, and longer service life than equivalent round bags
• Compatible Star Cage: Star-profile wire cage supplied with each bag — precision-formed to maintain lobe geometry under collector suction pressure and mechanical shock of pulse cleaning
• All Standard Felt Media: Available in polyester, polypropylene, acrylic, Nomex, and PTFE needle-punched felt with singed/calendered/PTFE membrane surface options — same high-performance media as standard round bags
• Standard Collector Fit: Outer diameter of star assembly fits standard 127 mm, 150 mm, or custom collector tube-sheet holes — retrofits directly into existing pulse-jet baghouse without tube-sheet modification
• Pulse-Jet Cleaning Compatible: Star geometry with matched cage construction withstands repeated compressed-air pulse cleaning cycles — fabric flexes at the lobe roots to dislodge cake without bag collapse

Technical Specifications

Applications

• Cement and Lime Plants: Retrofit upgrade of existing baghouses where tube-sheet positions cannot be increased — star bags multiply filtration area within the existing hole pattern
• Chemical Industry: Space-constrained dust collectors where increasing bag count is not an option — star profile achieves area target within the existing collector shell
• Pharmaceutical Plants: Compact dust collectors in pharmaceutical API and excipient handling areas where star bags extend service intervals and reduce maintenance frequency in limited floor space
• Food Processing: Grain, flour, starch, and sugar dust collectors where increased filtration area improves efficiency and reduces cleaning pulse frequency in existing dust collection equipment
• General Manufacturing: Any pulse-jet baghouse where increasing filtration area without replacing the collector shell is the most cost-effective route to improved performance and longer bag life

Why Choose Skytech Ultrafab for Star Filter Bag?

• Retrofit Without Tube-Sheet Changes: Star bags fit existing 127 mm or 150 mm tube-sheet holes — no collector modification needed to multiply filtration area and dramatically improve baghouse performance
• Matched Star Cage Supplied: Precision star cage included with every bag order — correct cage geometry is critical for area gain and cleaning performance, and Skytech designs and supplies both together
• All Fibre Options Available: Polyester through PTFE star bags available — same material choice as standard round bags, meaning star bags can be specified for any temperature or chemical condition
• Application Engineering: Skytech engineers size the correct lobe count and bag length for the specific collector and dust load — wrong star geometry can reduce rather than improve performance
• Competitive Pricing: Star bag premium over standard round bags is significantly less than the cost of collector modification or new collector purchase to achieve the same filtration area gain