Replacement Air Intake Filter Element – Equivalent Replacement For Soklberg AP431, 431, 31 & 31P This high-quality replacement air intake filter element is designed as an equivalent replacement for AP431, 431, 31, and 31P filter elements. It is manufactured to provide excellent airflow and filtration performance while helping protect your compressor, blower, vacuum pump, or other industrial equipment from dust and airborne contaminants. Unlike many standard replacement elements, this filter includes a removable foam pre-filter for increased dirt-holding capacity and extended service life. The foam sleeve can easily be removed if your application requires the standard configuration, making this filter compatible with both P and non-P style applications. Features Equivalent replacement for AP431, 431, 31, and 31P filter elements Fits equipment designed to use these filter element part numbers Heavy-duty pleated polyester filter media Removable foam pre-filter for increased dirt-holding capacity Foam pre-filter can be removed when not required High airflow with excellent filtration efficiency Reinforced construction for long service life Helps protect compressors, blowers, vacuum pumps, and other industrial equipment Dimensions Filter Height: 4-5/8" (4.625") Outside Diameter (Filter Only): 5-3/4" (5.75") Outside Diameter with Foam Pre-Filter Installed: 6.00" Please verify dimensions before ordering to ensure compatibility with your application. Replaces Part Numbers AP431 431 31 31P Common Applications Air compressors Rotary screw compressors Reciprocating compressors Vacuum pumps Industrial blowers Pneumatic conveying equipment Dust collection systems Industrial machinery Important Compatibility Information This is an aftermarket replacement filter element designed to fit equipment that uses the part numbers listed above. It is not manufactured by, affiliated with, or endorsed by Solberg Manufacturing, Inc. Any manufacturer names or part numbers are used for identification and compatibility purposes only.