Extended Service Life and Higher Flow in Standard Bag Filter Housings

Skytech Ultrafab PP Pleated Hardshell Filter Bags combine a rigid polypropylene outer cage with a pleated polypropylene or polyester membrane inner element to deliver up to 5× the filtration area of conventional flat-panel bags in the same housing footprint. This increased surface area translates into lower differential pressure, longer change-out intervals, and higher flow rates in paint, chemical, water treatment, and industrial process applications.

What Are PP Pleated Hardshell Bags?

PP Pleated Hardshell Filter Bags are a high-performance alternative to standard needle-felt liquid filter bags. A rigid polypropylene support cage holds a pleated membrane or melt-blown depth filter element in a fixed, expanded geometry inside a standard size 1 or size 2 bag filter housing. The pleating dramatically increases the available filtration surface area compared to a flat bag of the same housing size — delivering superior performance without housing modification.

Features and Benefits

• 5× Greater Filtration Area: Pleated element provides up to 5 times more filtration area than an equivalent flat-panel felt bag in the same housing — dramatically reducing differential pressure and extending bag life
• Rigid Cage Support: Structural polypropylene outer cage prevents element collapse at high differential pressure — maintains full filtration area throughout the service cycle
• Absolute Micron Ratings: Pleated membrane element achieves absolute ratings from 0.5 µm to 50 µm for reliable, consistent particle retention in each cycle
• Lower Operating Costs: Extended change-out interval reduces bag consumable cost, labour downtime, and waste disposal versus conventional felt bags in the same housing
• High Flow Rate: Large pleated surface area supports higher liquid flow rates at equivalent or lower differential pressure compared to flat-panel alternatives
• Drop-In Replacement: Size 1 and Size 2 PP hardshell bags install directly into all standard bag filter housings without housing modification or adapter rings

Technical Specifications

Applications

• Paint and Coatings: Fine pigment agglomerate and gel particle removal from water-borne and solvent-borne paints — longer bag life reduces costly paint-line changeover downtime
• Chemical Process Filtration: Intermediate chemical product clarification where consistent micron retention and low pressure drop are both critical process requirements
• Water Treatment: Pre-filtration ahead of RO membranes and UV systems where extended service intervals reduce maintenance intervention frequency
• Industrial Process Liquids: General process liquid filtration in pharmaceutical, food, and chemical industries where absolute micron ratings are required
• Metalworking: Fine coolant polishing to achieve sub-5 µm particle control for high-precision grinding and lapping operations

Why Choose Skytech Ultrafab for PP Pleated Hardshell Bags?

• Performance Guarantee: Each bag tested for integrity and dimensional fitment before despatch — absolute micron rating verified by bubble point or particle challenge test
• Lower Total Cost: Despite higher unit cost than flat-panel felt bags, extended service life typically delivers 40–60% lower total filtration cost per unit volume processed
• Immediate Stock: Common micron ratings and both bag sizes held in stock for same-week delivery across India
• Housing Compatibility: Confirmed compatible with all major bag filter housing brands — Eaton, Parker, Fil-Trek, Boll & Kirch, and locally manufactured vessels
• Technical Selection: Application engineers assist in confirming the right micron rating, media type, and bag size for your specific process liquid and flow requirements