\n| 60 PPI<\/td>\n | Very fine pore structure within this product range<\/td>\n | Specialized applications requiring careful validation of flow and filter loading<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n This table is a starting guide, not a universal grade-to-application rule. Actual performance varies with filter structure, melt cleanliness, metal flow rate, filtration area, and operating conditions.<\/p>\n A common purchasing mistake is to select the highest available PPI without checking whether the filter area and process can support the required throughput. Where finer filtration increases flow resistance, a larger filter area or a different filtration configuration may be more appropriate.<\/p>\n <\/span>What Ceramic Foam Filter Sizes Are Available?<\/span><\/h2>\nFilter dimensions must match the filtration chamber and the required metal throughput. AdTech offers standard square ceramic foam filters in several nominal sizes, with a standard thickness of 50 mm. Customized dimensions can be considered when the existing filter box or casting line requires a different specification.<\/p>\n \n\n\n| Nominal filter size<\/th>\n | Approximate dimensions in millimeters<\/th>\n | Typical purchasing consideration<\/th>\n<\/tr>\n<\/thead>\n | \n\n| 7 \u00d7 7 in<\/td>\n | 178 \u00d7 178 mm<\/td>\n | Smaller filtration chambers<\/td>\n<\/tr>\n | \n| 9 \u00d7 9 in<\/td>\n | 229 \u00d7 229 mm<\/td>\n | Compact casting installations<\/td>\n<\/tr>\n | \n| 12 \u00d7 12 in<\/td>\n | 305 \u00d7 305 mm<\/td>\n | Intermediate filtration area<\/td>\n<\/tr>\n | \n| 15 \u00d7 15 in<\/td>\n | 381 \u00d7 381 mm<\/td>\n | Larger metal throughput requirements<\/td>\n<\/tr>\n | \n| 17 \u00d7 17 in<\/td>\n | 432 \u00d7 432 mm<\/td>\n | Filtration systems requiring additional area<\/td>\n<\/tr>\n | \n| 20 \u00d7 20 in<\/td>\n | 508 \u00d7 508 mm<\/td>\n | Larger casting operations<\/td>\n<\/tr>\n | \n| 23 \u00d7 23 in<\/td>\n | 584 \u00d7 584 mm<\/td>\n | High-capacity filtration configurations<\/td>\n<\/tr>\n | \n| 26 \u00d7 26 in<\/td>\n | 660 \u00d7 660 mm<\/td>\n | Large filtration chambers and high-throughput applications<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n These are nominal dimensions; the final drawing should specify the required dimensional tolerances and thickness.<\/p>\n Filter size should not be selected from casting tonnage alone. The required filtration area also depends on the instantaneous metal flow rate, the design of the filter chamber, the casting process, and the available metallostatic head. A suitable filter must fit the installation and provide enough flow capacity throughout the intended casting operation.<\/p>\n <\/span>Why Does the Filter’s Edge-Sealing Design Matter?<\/span><\/h2>\n![\"Workers](\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/10\/11-scaled.jpg\") Workers applying CFF edging<\/em><\/p><\/div>\nA ceramic foam filter must fit securely in the filter chamber. If molten aluminum flows around the filter instead of through it, part of the metal bypasses the filtration medium. This can undermine the purpose of installing a filter, even when the selected PPI is appropriate.<\/p>\n The sealing arrangement is therefore an important part of the purchase specification.<\/p>\n AdTech offers a ceramic foam filter design with an expanding fiber edge. During the specified preheating process, the edge expands to help close small gaps between the filter and its seat, reducing the risk of metal bypass.<\/p>\n When comparing CFF suppliers, check the following:<\/p>\n \n\n\n| \u041e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u044c<\/th>\n | What to verify<\/th>\n<\/tr>\n<\/thead>\n | \n\n| Filter dimensions<\/td>\n | Compatibility with the filter chamber and seat<\/td>\n<\/tr>\n | \n| Edge geometry<\/td>\n | Correct fit and support within the filter box<\/td>\n<\/tr>\n | \n| Sealing material<\/td>\n | Suitability for the intended thermal conditions<\/td>\n<\/tr>\n | \n| Expansion behavior<\/td>\n | Compatibility with the specified preheating procedure<\/td>\n<\/tr>\n | \n| Filter integrity<\/td>\n | No unacceptable cracks, chips, or structural damage<\/td>\n<\/tr>\n | \n| Installation method<\/td>\n | Clear instructions for seating and sealing the filter<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n The sealing design must work with the actual filter box. A gasket cannot compensate for a badly mismatched filter dimension or incorrect installation.<\/p>\n <\/span>What Should You Check When Buying Ceramic Foam Filters from a Manufacturer?<\/span><\/h2>\nA reliable CFF specification should identify more than the product name and PPI rating. Buyers should confirm that the supplier can provide consistent dimensions, a defined material specification, and a filter suitable for the intended aluminum casting process.<\/p>\n The following items help distinguish a technically complete quotation from one that only lists a unit price.<\/p>\n \n\n\n| \u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438<\/th>\n | Information to confirm before ordering<\/th>\n<\/tr>\n<\/thead>\n | \n\n| \u041c\u0430\u0442\u0435\u0440\u0438\u0430\u043b<\/td>\n | Alumina-based ceramic suitable for molten aluminum filtration<\/td>\n<\/tr>\n | \n| PPI<\/td>\n | Required pore density and available grade<\/td>\n<\/tr>\n | \n| \u0420\u0430\u0437\u043c\u0435\u0440\u044b<\/td>\n | Length, width, thickness, and dimensional tolerance<\/td>\n<\/tr>\n | \n| Edge design<\/td>\n | Standard edge or specified sealing arrangement<\/td>\n<\/tr>\n | \n| Operating conditions<\/td>\n | Alloy, metal temperature, and process requirements<\/td>\n<\/tr>\n | \n| Flow requirements<\/td>\n | Metal throughput and available filtration area<\/td>\n<\/tr>\n | \n| \u041a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0430<\/td>\n | Dimensional checks and agreed acceptance criteria<\/td>\n<\/tr>\n | \n| \u0423\u043f\u0430\u043a\u043e\u0432\u043a\u0430<\/td>\n | Protection against breakage during storage and transport<\/td>\n<\/tr>\n | \n| Supply consistency<\/td>\n | Whether repeat orders can follow the approved specification<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n For a production line running continuously, consistency between deliveries matters. A nominally identical filter that differs in dimensions or pore structure may not behave identically in the same filtration system. Requesting a controlled product specification and agreed inspection criteria helps reduce uncertainty when placing repeat orders.<\/p>\n Claims such as a fixed filtration percentage or a guaranteed removal size should be evaluated against the test method and operating conditions behind them. PPI alone is not sufficient evidence of a particular filtration result.<\/p>\n ![\"ceramic](\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/10\/7316_2TFQ7a9t.webp\") ceramic foam filter with cotton edge<\/em><\/p><\/div>\n<\/span>How Much Does a Ceramic Foam Filter Cost?<\/span><\/h2>\nThe price of a ceramic foam filter depends on its size, PPI, material specification, sealing design, order quantity, and customization requirements. Comparing unit prices is useful only when the quoted filters share the same technical specification.<\/p>\n A lower-priced filter may not offer the required dimensions or filtration characteristics. Conversely, selecting a finer PPI than the process needs can add cost or create unnecessary flow restrictions.<\/p>\n When comparing quotations, consider:<\/p>\n | | | |
![\"ceramic](\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/ceramic-foam-filter\u4e3b\u56fe.webp\")