Dia 50×22 10PPI 20PPI Round Zirconia Ceramic Foam Filter for Foundry

Foundrymax – Round Ø50×22mm / 10PPI & 20PPI Zirconia Ceramic Foam Filter for Foundry Applications

• Material: Zirconia (ZrO₂), max service temperature 1700°C

• Pore Density Options: 10 PPI – high flow, coarse filtration; 20 PPI – finer filtration for enhanced cleanliness

• Dimensions: 50 mm diameter × 22 mm thickness (round disc)

• Structure: Open‑cell reticulated foam

• Core Functions: Removes non‑metallic inclusions, oxides, slag, and refractory fragments; reduces turbulence and gas entrapment

• Primary Applications: Carbon steel, alloy steel, stainless steel, nickel‑based alloys, and other high‑temperature metals

Foundrymax Round Ø50×22mm / 10PPI & 20PPI Zirconia Ceramic Foam Filter for Foundry Applications

Foundrymax offers the Ø50×22mm zirconia ceramic foam filter in 10 PPI, 20 PPI and 30PPI pore densities, providing foundries with flexibility to match filtration performance to specific alloy and quality requirements. This round disc filter delivers reliable high‑temperature performance in a practical, compact format.

Zirconia (ZrO₂) is the established filter material for steel and high‑alloy casting, rated to 1700°C. It maintains structural integrity at steel pouring temperatures (typically 1550°C–1650°C). Zirconia resists erosion from aggressive slags and does not react with or contaminate the melt – essential for maintaining alloy chemistry and achieving consistent mechanical properties. 

The 50mm diameter round format provides practical filtration coverage for a range of castings, fitting neatly into sprue wells, pouring cups, and runner systems. The 22mm thickness offers robust mechanical strength for pouring conditions.

Pore density options are available to suit different application needs:

• 10 PPI – Coarse pore structure (~2.5 mm) that maximises melt flow, making it suitable for larger or heavier castings where maintaining fill rate is the priority while still capturing coarse slag and refractory particles.

• 20 PPI – Finer pore structure (~1.2–1.5 mm) that captures smaller inclusions, delivering higher melt cleanliness. This grade is recommended for applications requiring superior surface finish, pressure tightness, or critical service performance.

Application Versatility

These filters are suitable for a broad range of foundry applications, including carbon steel, alloy steel, stainless steel, and nickel‑based superalloys. The 10 PPI version is often selected for general steel casting where flow rate is the primary consideration, while the 20 PPI version is preferred for higher‑integrity castings where inclusion control is more critical.

Why Foundrymax for This Zirconia Filter?

As a direct manufacturer, we produce this Ø50×22 size with both pore densities, maintaining consistent quality and dimensional accuracy. Alternative thicknesses (15mm, 20mm, 25mm) and other PPI grades are available upon request. Our technical team can advise on the optimal pore density for your specific alloy and quality requirements.

Contact Foundrymax to discuss your foundry filtration needs or request samples of diffrernce PPI grades for evaluation.