The Castair ROFP50-60 is the OEM replacement oil filter for Castair rotary screw compressors equipped with the P50 or P60 rotary pump air end. Maintaining proper oil filtration on these air ends protects rotor bearings, timing gears, and sealing surfaces — the components that determine how long your air end runs before requiring rebuild or replacement. This is the correct OEM filter for the P50-60 platform.
Application
The P50 and P60 designations refer to specific Castair rotary pump air end variants. If your compressor service documentation or model plate references a P50 or P60 air end, this is the correct oil filter. Note that the ROFD62-P75-P90 covers P75 and P90 variants — this ROFP50-60 is specifically for the P50 and P60 models, which have different filter dimensions or thread specifications.
Maintenance and Service
- Filter type: Replacement oil filter for P50-60 rotary pump
- Service interval: Replace at each scheduled oil change per Castair maintenance schedule
- Compatible oil: GA4000 or FG4000 Castair synthetic rotary screw lubricant (1 year/4,000 hour rating)
- Companion filter: RSFP50-60 separator filter — replace at major service intervals alongside the oil filter
- Hour meter: Standard on all Castair rotary screw units; use it to track oil change and filter replacement intervals
Why OEM Matters on Rotary Screw Oil Filters
The oil filter bypass valve rating is calibrated for the specific oil viscosity and flow characteristics of each air end design. An undersized or incorrectly rated filter can bypass at the wrong differential pressure — either allowing contaminated oil to circulate when it should not, or restricting flow when cold oil viscosity is high. For a 100% duty cycle machine, neither outcome is acceptable. Use the OEM filter.
Technical Specifications
- Part Number: ROFP50-60
- Filter Type: Replacement oil filter
- Compatible Air Ends: Castair P50, P60 rotary pump
- Companion Filter: RSFP50-60 (separator filter)
- Manufacturer: Cast Air
Why Buy From OEM Diagnostic Tools?
Genuine Castair OEM maintenance parts. Free shipping on qualifying orders. Free tech support at 866-217-0063. Full Castair manufacturer warranty. Call us to verify compatibility with your P50-60 model before ordering.
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