What is ppi?

PPI means: "How many holes are there in a square inch?" For example: 25ppi, that's 25 holes in one square inch. 30ppi 30 holes in one square inch. 

● The larger the value is , the smaller the hole is. 

● Meanwhile, the smaller the pore size is, the better the filtration effect is.

● Generally, 15-20ppi refers to the large hole, 25-30ppi is the medium hole, and more than 35ppi is the small hole.

What the rational ppi for Aluminium, Iron and Steel liquid filtration?

In order to get the best filtration effection for your metal casting, the right ppi should be chosen before order that.

What can We"Hebei Cangchen" do for you?

Hebei Cangchen, a professional foundry filtration products manufacturer who focuses on the production, sales, service and solutions. We are the recognized leader in the development and production of casting filters at home and abroad, and possesses the excellent innovation capabilities in filter manufacturing technology.

Main products include all kinds of high silica fiberglass filter mesh, smokeless & odorless high temperature carbonized fiberglass filtration mesh, fiberglass filter bag and other heteromorphic filter mesh, ceramic foam filters including SIC, Alumina, Zirconia and Honeycomb extruded ceramic filter.

As a professional and experienced supplier, not only customize the casting filtration products to those who have their own brand, but also customize the solutions and service to them. 

Welcome all clients to inquiry our products, if any need, please leave us a message, we will reply you rapidly!