Cast Iron Filter Press

High-Temperature Cast Iron Filter Press

The Only Solution for Extreme Temperatures and Viscous Materials.

Standard Polypropylene (PP) filter plates have a limit: they soften and deform at temperatures above 80°C. For industrial processes involving hot oil, petroleum sludge, or high-viscosity ceramics, you need a machine with superior thermal stability and mechanical strength.

Our Cast Iron Filter Press is built entirely from high-strength cast iron or ductile iron. It withstands temperatures up to 300°C and filtration pressures up to 2.5 MPa, ensuring reliable operation in the harshest environments.

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Why Cast Iron? Built for Extreme Conditions

When process conditions get tough, Cast Iron delivers:

1. Extreme Heat Resistance:

  • Maintains structural integrity up to 300°C.
  • Ideal for filtering hot edible oils, petroleum residues, and chemical solvents that would melt plastic plates.

2. High Pressure Capability:

  • Cast iron plates are rigid and do not flex.
  • Can handle filtration pressures up to 2.5 MPa (25 bar), resulting in drier cakes for difficult-to-dewater sludges.

3. Durability & Lifespan:

  • Resistant to oxidation and wear.
  • With proper maintenance, a cast iron plate pack can last for decades.

4. Excellent Sealing:

  • Precision-machined sealing surfaces ensure minimal leakage even at high pressures.

Versatile Plate Configurations

We offer two main designs to fit your specific process:

  • Square Cast Iron Plates:
  • Standard chamber or plate-and-frame design.
  • Best for general high-temperature filtration in chemical and ceramic industries.
  • Round Cast Iron Plates:
  • Designed specifically for Ceramic Industries (Kaolin, Pottery Clay) and Stone Cutting.
  • The round shape provides better stress distribution under ultra-high feeding pressures.
Cast iron filter press frame

Parameters

Plate size: 320x320mm, 450x450mm, 630x630mm, 800x800mm, 1000x100mm.

Filtering Area from 10 to 200 m2.

Feeding Pump Pressure: 6 bar.

Industries Requiring Cast Iron Filter Press

filter press use in tailings disposal picture

Petroleum & Petrochemicals

Waste oil recycling and regeneration. Dewaxing of lubricating oils. Bitumen and asphalt filtration.

filter press use in ceramic industry

Ceramics & Stone

Kaolin clay dewatering (requires high pressure). Porcelain insulator production.

filter press use in food industry

Edible Oil

High-temperature bleaching earth filtration (palm oil, soybean oil).

filter press use in chemical industry

Chemical Industry

Hot chemical solutions and solvents.

Frequently Asked Questions

A: Yes, cast iron plates are significantly heavier than PP plates. Therefore, for models larger than 630mm, we strongly recommend our Automatic Hydraulic System and Automatic Plate Shifter to reduce operator fatigue.

A: Cast iron can oxidize on the surface, but it does not corrode structurally like thin steel. For applications requiring clean filtrate (e.g., food oil), we recommend using high-quality filter paper or cloth as the primary barrier.

A: Cast iron is generally NOT suitable for strong acids (pH < 6). For hot acidic liquids, we recommend our Stainless Steel Filter Press. Cast iron is excellent for neutral, alkaline, or oil-based fluids.

Handle the Heat

Don’t let high temperatures stop your production. Choose the durability of Cast Iron.

Tell us your operating temperature and pressure requirements.

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