10/20/30/40 PPI 150×150×22 mm Porous Silicon Carbide Filter

Foundrymax – Square 150×150×22mm / Multi‑PPI Silicon Carbide Ceramic Foam Filter (10, 20, 30, 40 PPI)

• Material: Silicon carbide (SiC), max working temperature 1500°C

• Pore density options: 10 PPI (~2.5 mm pores) – high flow, coarse filtration; 20 PPI (~1.2–1.5 mm) – balanced; 30 PPI (~0.8–1.0 mm) – fine; 40 PPI (~0.6–0.7 mm) – extra fine for precision

• Dimensions: 150 mm × 150 mm × 22 mm (square)

• Structure: Open‑cell reticulated foam

• Core functions: Removes slag, dross, sand inclusions, and oxide films; reduces turbulence; improves melt cleanliness and casting integrity

• Primary applications: Large castings – engine blocks, cylinder heads, pump housings, valve bodies, wind power components, heavy machinery parts (gray/ductile iron, aluminium, copper alloys)

Foundrymax 150×150×22mm Multi‑PPI Porous Silicon Carbide Ceramic Foam Filter

For foundries processing large castings, the choice of filter pore density often depends on the alloy, section thickness, and required surface finish – but changing filter dimensions for every job adds inventory complexity. Foundrymax solves this with the 150×150×22mm square silicon carbide foam filter, available in four distinct PPI grades (10, 20, 30, and 40) within the same robust footprint. This means you can standardise your gating design while dialling in the exact filtration performance for each production run.

The 150×150mm surface provides over twice the area of a 100×100 square, making it ideal for high‑throughput lines, large sprue wells, or heavy‑section castings where melt volume is substantial. The 22mm thickness ensures structural rigidity to withstand the thermal shock of molten iron (up to 1500°C) and mechanical handling in automated moulding lines.

Each PPI grade serves a distinct purpose:

• 10 PPI – coarse pores maximise flow rate, suitable for ductile iron and large aluminium components where primary slag removal is the priority.

• 20 PPI – a balanced choice for grey iron and medium‑section castings, offering good retention of finer dross without significantly reducing throughput.

• 30 PPI – finer pores capture smaller inclusions, recommended for aluminium alloys and thin‑wall iron castings where surface quality is critical.

• 40 PPI – extra‑fine structure for precision applications, such as aerospace or hydraulic components, where minimal defects are non‑negotiable.

Why Foundrymax for this multi‑PPI range?
Manufacturing this large format in various densities requires precise sintering control – exactly what our in‑house production delivers. We maintain stock of all PPI variants, offering short lead times and flexible order quantities. Our technical team can also advise on PPI selection based on your specific alloy, pouring temperature, and casting geometry. Factory‑direct pricing and sample support make it easy to test multiple grades on your shop floor.

Contact Foundrymax to discuss your large‑format filtration needs or request a trial pack of different PPI options.