3	Return Line - Suction Filters
4	Pressure Filters Change over
5	Pressure Filters PN < 100 bar
6	Pressure Filters PN > 100 bar
7	Stainless Steel Pressure Filters
8	Filter Battery
9	Off-Line Filters
11	Suction Filters
12	Breather Filters
14	Spin-On Filters
15	Clogging Indicators
16	Accessories
18	Specifications
19	Interchange Elements