The mesh size (aperture) of flat nylon filter screens is typically customized based on application requirements, but common standard ranges are as follows:
1. Standard Mesh Sizes
| Mesh Count (Mesh) | Aperture Size (μm/mm) | Typical Applications |
|---|---|---|
| 50 Mesh | 300~350 μm (0.3~0.35 mm) | Coarse filtration (e.g., fruit juice, industrial wastewater) |
| 100 Mesh | 150~160 μm (0.15~0.16 mm) | Medium precision (e.g., paint filtration) |
| 200 Mesh | 75~80 μm (0.075~0.08 mm) | Fine filtration (e.g., ink, pharmaceutical liquids) |
| 300 Mesh | 48~50 μm (0.048~0.05 mm) | High precision (e.g., electronic chemicals) |
| 400 Mesh | 38~40 μm (0.038~0.04 mm) | Ultra-fine filtration (e.g., precious metal recovery) |
2. Key Factors Affecting Performance
- Mesh Count (Mesh): Number of openings per inch (25.4 mm). Higher mesh = smaller aperture.
- Wire Diameter : Thickness of nylon threads (usually 0.05~0.5 mm), affecting actual aperture.
- Formula:
- Weaving Method: Plain weave (standard) vs. twill weave (higher strength) affects effective filtration area.
3. Industry Applications
- Food Industry: 80~200 Mesh (0.08~0.15 mm), compliant with FDA standards.
- Water Treatment: 50~150 Mesh (0.3~0.1 mm), corrosion-resistant.
- Chemical/Pharmaceutical: 200~400 Mesh (0.075~0.04 mm), requires chemical stability.
4. Selection Guide
- Define Filtration Target: Particle size to be filtered (e.g., 50 μm particles require ≤200 Mesh).
- Flow Rate Consideration: Higher mesh = greater resistance; balance precision vs. flow speed.
- Material Certification: Food-grade (GB 4806.7-2016) or industrial-grade (wear resistance).
5. Notes
- Measurement: Use laser particle analyzers or standard test sieves for calibration.
- Temperature Limits: Nylon mesh withstands ≤100°C; switch to metal mesh for high-temperature environments.
