Flour Mill Plansifter Sieve Frame in 304 Stainless Steel (AISI 304 (1.4301)) is used for separating flour, semolina, middlings and bran in plansifters with tensioned sieve frames covered in stainless steel cloth matched to each mill stream. The alloy gives good general corrosion resistance in atmosphere and fresh water and is essentially non-magnetic (annealed), with a practical service limit of approx. +450 °C continuous.
Alloy Properties
| Grade designation | AISI 304 (1.4301) |
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| Magnetic response | Essentially non-magnetic (annealed) |
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| Service temperature | approx. +450 °C continuous |
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| Corrosion characteristic | Good general corrosion resistance in atmosphere and fresh water |
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Specifications of Flour Mill Plansifter Sieve Frame Available in 304 Stainless Steel
| Mesh count | Wire diameter (mm) | Aperture (mm) | Micron rating (u00b5m) | Open area (%) | Frame |
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| 20-Mesh | 0.400 | 0.870 | 870 | 46.9 | Square 640 u00d7 640 wood/aluminum |
| 40-Mesh | 0.250 | 0.385 | 385 | 36.8 | Square 640 u00d7 640 |
| 60-Mesh | 0.190 | 0.233 | 233 | 30.4 | Square 740 u00d7 740 |
| 100-Mesh | 0.100 | 0.154 | 154 | 36.8 | Square 740 u00d7 740 |
Where 304 Stainless Steel Flour Mill Plansifter Sieve Frame Is Used
- Wheat flour mills: plansifter sieve stacks on break, reduction and scratch passages.
- Semolina & durum mills: grading semolina from flour and bran.
- Corn & rice mills: grits and meal sifting.
- Spice, sugar & feed mills: sifting and grading powders.
Ordering Flour Mill Plansifter Sieve Frame in 304 Stainless Steel
- Frame size & make: Square frames must match the plansifter model and stack height.
- Mesh by stream: 20–40 mesh on break passages, 60–100 mesh on flour dressing.
- Tension & cleaners: High, even cloth tension with sieve cleaners or pads under every sieve.
Mistakes to Avoid with Flour Mill Plansifter Sieve Frame
- Fitting the wrong mesh in a stream, which sends bran into flour.
- Running slack, torn or patched cloth.
