Castair C-CF34 Coalescing Filter -- 3/4-inch NPT, 120 CFM, 250 PSI
The Castair C-CF34 is a 3/4-inch NPT coalescing filter rated for 120 CFM at 250 PSI maximum, using a 0.01-micron DPI element to capture oil aerosols and submicron water mist from compressed air. It sits in the middle of the Castair coalescing filter lineup -- larger than the 1/2-inch C-CF12 but below the 1-inch C-CF10. The 3/4-inch connection makes it a good fit for moderate-demand shop main lines or higher-flow branch drops.
Like all Castair coalescing filters, the C-CF34 requires a 5-micron particulate prefilter upstream. The C-F7 element fits both the C-CF34 and the C-CF12 (7000 series), which simplifies stocking if your shop runs both sizes.
Key Features
- Port Size: 3/4-inch NPT -- handles moderate-demand shop main lines and high-flow branch drops
- Filtration Rating: 0.01 micron -- removes oil aerosols and fine water mist
- DPI Indicator: Differential pressure indicator signals when the element is loaded
- Flow Capacity: 120 CFM
- Maximum Pressure: 250 PSI
- Bowl Capacity: 8.5 oz
- Replacement Element: C-F7 (7000 series -- same as C-CF12)
Prefilter Requirement
A 5-micron particulate prefilter is required upstream. For 3/4-inch lines, pair with the Castair C-FS34. The coalescing element is designed for final polishing of already-filtered air -- not for handling pipe scale or bulk water.
Coalescing Filter Lineup
- C-CF12: 1/2-inch NPT, 105 CFM, 8.5 oz bowl -- single-bay branches
- C-CF34: 3/4-inch NPT, 120 CFM, 8.5 oz bowl -- mid-range main lines (this unit)
- C-CF10: 1-inch NPT, 150 CFM, 11 oz bowl -- main line for larger, multi-bay shops
Technical Specifications
- Part Number: C-CF34
- Port Size: 3/4-inch NPT
- Maximum Pressure: 250 PSI
- Flow Rating: 120 CFM
- Bowl Capacity: 8.5 oz
- Filtration Rating: 0.01 micron (coalescing, DPI equipped)
- Replacement Element: C-F7 (7000 series)
- Prefilter Required: Yes -- 5-micron particulate filter upstream
- Manufacturer: Castair Inc., Spicer, Minnesota
Why Buy From OEM Diagnostic Tools?
We have been supplying compressed air components since 2016. The Castair C-CF34 ships free with full manufacturer warranty. Call 866-217-0063 to confirm the right filter size and matched prefilter for your system.
Call 866-217-0063 for quick answers and help!
