"筒式过滤器" can be translated as "cylindrical filter" or "cartridge filter" （后者在特定语境下，若筒式过滤器以类似滤芯形式呈现时也适用，不过“cylindrical filter”更直接对应其形状特征） in English, depending on the specific context and the intended emphasis on its shape or function.
“Cylindrical filter” emphasizes the cylindrical (tube-like) shape of the filter.
“Cartridge filter” can sometimes refer to filters that are cartridge-shaped, which might include some cylindrical filters, especially when they are designed as replaceable units in filtration systems.
In most general cases describing the physical form, "cylindrical filter" is a straightforward and accurate translation.