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Spiral Scraper Self-Cleaning Filter for High‑Viscosity Water-Based Paint Filtration

📍 Indonesia · 🎨 Paint and coatings production · 📦 Self-Cleaning Filter
 
Paint and coatings production poses extreme filtration challenges due to high viscosity, sticky pigments and high solids content, which easily cause screen clogging, pressure spikes and frequent equipment downtime. With professional application insight and targeted technical design, we delivered a reliable spiral scraper self-cleaning filtration solution for high-solids water-based paint processing.

Project Background & Client Requirements

The client needed a continuous filtration system specially designed for high-solids water-based paint. Conventional gravity scraper filters cannot adapt to sticky, high-viscosity paint media, resulting in poor cleaning effect and unstable operation. The project required stable, long-cycle automatic filtration to support continuous production.

Core Process Parameters 

  • Application: High-solids water-based paint filtration
  • Processing flow: 12,000 kg/h
  • Filtration precision: 100 μm
  • Medium viscosity: 2,000–13,200 mPa·s
  • Construction material: 304 stainless steel
  • Safety standard: ATEX Zone 1 explosion-proof motor protection

Industry Pain Points & Technical Challenges

Traditional scraper-type self-cleaning filters rely entirely on gravity to drop intercepted solids, which only works for low-viscosity, low-solid and non-sticky liquids.
For water-based paint with viscosity up to 13,200 mPa·s, sticky intercepted pigments cannot fall off naturally. Solids continuously accumulate inside the filter housing, leading to rising differential pressure, increased motor torque, reduced cleaning efficiency, motor overload failure and frequent production shutdowns.

Our Customized Solution: Spiral Scraper Self-Cleaning Filter

Based on rich experience in paint and coating filtration, we recommended the SS304-325-Scraper Automatic Self-cleaning Filter to completely solve the pain points of sticky solid accumulation and insufficient gravity discharge.

Working Principle

The spiral scraper adopts active screw conveying design instead of passive gravity cleaning. During operation, the equipment stably intercepts paint impurities on the screen surface. The rotating spiral structure continuously scrapes and actively conveys sticky solids to the bottom discharge area. The automatic valve opens according to differential pressure signals to discharge concentrated pollutants, realizing fully continuous and unmanned filtration.

Core Advantages for Paint Filtration

  • Active solid conveying: Effectively transports sticky high-viscosity paint residues without relying on gravity, completely avoiding internal accumulation
  • Low operating resistance: No solid deposition around rotating parts, greatly reducing motor torque and operating load
  • Stable pressure operation: Maintains stable differential pressure and consistent filtration efficiency even under long-term high-flow working conditions
  • Lower failure & maintenance rate: Avoids motor overheating and burnout risks, reducing downtime and after-sales costs

Professional Application Matching

The key to paint industry filtration is matching the correct cleaning mechanism:
Conventional scraper filters: Only applicable for low-viscosity, low-solid media with freely falling impurities.
Spiral scraper filters: Specially optimized for high-viscosity coatings, high-solid water-based paints and sticky resin media, perfectly solving the industry’s universal filtration bottleneck.

Project Outcome 

The deployed spiral scraper self-cleaning filter stably undertakes the client’s 12,000 kg/h high-viscosity water-based paint filtration work. It perfectly meets 100μm precision filtration and ATEX Zone 1 explosion-proof requirements. The equipment achieves continuous automatic cleaning, eliminates pressure fluctuation and solid accumulation problems, greatly improves production stability and reduces daily maintenance frequency.

Full Project Workflow

  1. Analyze client’s high-viscosity water-based paint working conditions and industry pain points
  2. Rule out unsuitable traditional gravity scraper solutions
  3. Recommend targeted spiral scraper self-cleaning filter solution
  4. Equip with SS304 material and ATEX Zone 1 explosion-proof configuration
  5. Realize stable continuous filtration and low-failure operation for paint production
If you need professional filtration equipment for high-viscosity paint, coatings and sticky chemical media, we can provide customized self-cleaning filter solutions based on your flow rate, viscosity and safety standards.
Any requirements? Contact us now!
💼 Grace
📩 Email: grace@filtrationchina.com
📱 Mobile / WhatsApp / WeChat: +86 17269571160
💡 We're here to help – reach out anytime! ✨

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