Castair Replacement Air Filter for P50-60 Rotary Pump (RAFP50-60)
The Castair RAFP50-60 is the replacement air filter for the P50-60 pump family. The P-series in Castair's lineup refers to their cast iron piston pumps — the PK20, PK30, PK50, PK60, and PUK65 are piston (not rotary screw) pump models. The P50 and P60 are 2 to 3.5 HP single-stage piston pumps producing 16 to 24 oz of oil capacity, used in smaller commercial-grade air compressor units.
Manufacturer-specific dimensional data for the RAFP50-60 filter (ID, OD, height) was not available from castair.net at time of writing. Contact us at 866-217-0063 before ordering if you need to confirm the exact filter dimensions for your unit. Provide your compressor model number and we can confirm the correct replacement.
P-Series Pump Context
Castair's piston pump lineup uses different filter housings from the rotary screw air ends. The filter for the P50-60 piston pump is separate from the D-series and G-series rotary screw filters. Using the wrong filter will result in poor fit and potential bypass of unfiltered air. Confirm you are running a P50 or P60 piston pump before ordering RAFP50-60.
Filter Details
- Part number: RAFP50-60
- Filter type: Replacement air filter element
- Application: P50 and P60 piston pump air ends
- Dimensions: Contact us at 866-217-0063 or check your unit documentation for confirmed dimensions
Piston Pump Filter Cross-Reference (Castair)
- P75 rotary screw air end filters: Use MKP75 PM kit (different from piston P-series)
- RAFP50-60 (this part): P50 and P60 piston pumps
- For other piston pump sizes: Castair's air filter assembly lineup starts at 1/4" inlet (F-10D-025) up through 2" inlet (S-32DP-200) for complete assemblies — call for your specific pump inlet size
When to Replace
- Inspect air filter at each oil change on piston compressors
- In high-dust environments (grinding, sanding, masonry), inspect monthly minimum
- A clogged filter on a piston compressor causes the pump to run hotter and work harder — accelerates valve wear and reduces output CFM
What Is in the Box
- 1x Castair RAFP50-60 replacement air filter
Why Buy From Air Compressor Factory Direct?
- Castair authorized: Correct OEM replacement part
- Free shipping on qualifying orders
- Free tech support: 866-217-0063 — confirm P50/P60 pump model and filter dimensions before ordering
- Full parts catalog: Air filters, oil filters, separator filters, and maintenance kits for all Castair pump families
Call 866-217-0063 for quick answers and help!
