Automatic Self Scrape Filter

Automatic Self-Scraping Filter (UMCF Series)

High-Viscosity & High-Dirt Load Filtration | 25–400 μm | Continuous Operation

The CMI UMCF Series Automatic Self-Scraping Filter is designed for high-viscosity, high-solid-content, and difficult-to-filter liquids where conventional bag or cartridge filters are not suitable.

This fully automatic system uses a pneumatically or electrically driven PTFE (Teflon) scraping disc to continuously clean the inner surface of a vertically installed wedge-wire filter element, ensuring stable filtration without interrupting flow.

Contaminants are concentrated at the bottom and discharged periodically within 1–2 seconds, minimizing product loss (typically <1%) while maintaining consistent flow and pressure.

The UMCF system is widely used in adhesives, resins, coatings, edible oils, pulp & paper, steel mills, and chemical processing.

Working Principle

The system operates by moving a PTFE scraper disc vertically inside the wedge-wire filter element.

Scraping Disc Mechanism

• Dual pneumatic actuator drives vertical movement
• PTFE disc with wiping and scraping edges
• Continuous contact with wedge-wire surface
• Solids are removed and directed downward during operation
• Accumulated solids are discharged via automatic drain valve

This design enables continuous filtration without stopping flow or opening the vessel.

Key Features

• Continuous filtration without shutdown
• No consumables – no filter bags or cartridges required
• PTFE self-cleaning scraper with long service life
• Suitable for high-viscosity liquids (up to 1,000,000 cps)
• Fast discharge (1–2 seconds, product loss <1%)
• Heavy-duty wedge-wire element, reusable and robust
• Quick-opening vessel design for fast maintenance
• Pneumatic or electric drive options

Applications

UMCF is designed for viscous, sticky, and high-solid-content liquids:

• Adhesives & glue (10,000–50,000 cps)
• Resins (5,000–50,000 cps)
• Paint & coatings (500–1,000 cps)
• Edible oils (10–100 cps)
• Honey (50–100 cps)
• Oil-based and water-based inks
• Pulp & paper processes
• Steel mill fluids
• Chemical processing
• Industrial parts washing
• Well water with high solids

Model Range (UMCF Series)

Technical Specifications

• Filtration Range: 25–400 μm
• Material: SS304 / SS316L
• Scraper: PTFE (Teflon)
• Filter Element: Stainless steel wedge wire
• Surface Finish: Shot blasted

Connections

• 1½” BSP (UMCF-4)
• 2” Flange (UMCF-8)
• 3” Flange (UMCF-16)
• 3” SMS (VUMCF-16)

Drive Options

• Pneumatic actuator (4–5 bar)
• Electric motor drive (optional)

Advantages vs Conventional Filters

Sizing Guide

A detailed sizing guide is available covering different fluids such as water, adhesives, oils, inks, paints, and resins. Please contact CMI Filtration for selection support.