Fully Welded Filter Bag Series

Fully Welded Filter Bag Series

Leak-Free Ultrasonic Welded Filter Bags | PP & PE Felt | No Sewing Holes

Product Overview

CMI’s Fully Welded Filter Bags are engineered to eliminate the risk of bypass during liquid filtration.

Instead of traditional stitching, the bags are constructed using ultrasonic welding technology, ensuring:

• No needle holes
• 100% leak-free sealing
• Stronger bonding around the plastic collar
• Superior performance in critical applications

The fully welded construction provides improved filtration efficiency, extended service life, and excellent sealing performance inside standard bag filter housings.

These bags are available in Polypropylene (PO) and Polyester (PE) felt materials, with a full range of sizes and micron ratings.

Key Features

• 100% welded — zero bypass risk
  No sewing holes means contaminants cannot escape into the filtered fluid.
• Ultrasonic welded seams
  Provides consistent weld strength and excellent sealing around the collar.
• Strong and reliable construction
  More durable than stitched bags, especially under high dirt load.
• Compatible with all major brands of bag housings
  Available in standard #1, #2, #3, #4, and #5 sizes.
• Made from silicone-free materials
  Suitable for paint, coating, automotive, and food-related applications.
• High dirt-holding capacity
  Multiple felt weights and high-quality fiber structure for improved retention.

Technical Specifications

Materials

• Polypropylene (PP / PO)
• Polyester (PE)

Micron Ratings

0.5, 1, 5, 10, 25, 50, 75, 100, 150, 200 µm

Filter Bag Sizes

• #1 – 7" dia × 17" length
• #2 – 7" dia × 32" length
• #3 – 4" dia × 9" length
• #4 – 4" dia × 15" length
• #5 – 6" dia × 20" length

Collar Types

• E – Polypropylene Collar
• H – Polyester Collar
• N – Nylon Collar
• EF – FSI Polypropylene Ring
• HF – FSI Polyester Ring

Screen / Mesh Options

• 25–400 mesh
• 2–10 mm perforated support (depending on application)

Ordering Code Structure

Filter Bag Ring Materials

Available ring materials include carbon steel (S), stainless steel (SS), polypropylene (E), polyester (H), and nylon (Z).