Parker Watts F504-02AH Miniature Air Line Filter, 1/4 in. NPT, 20 Micron
Air comes out of a receiver carrying water, pipe scale and whatever the compressor contributed. The F504 is the small particulate filter that goes in ahead of a tool, a cylinder or a regulator and takes the worst of it out. A deflector plate spins the air on the way in, centrifugal force throws the liquid and heavy solids to the bowl wall, and the element catches what is left down to 20 micron.
Published specification
- Port size: 1/4 in. NPT
- Maximum inlet pressure: 150 PSIG with the polycarbonate bowl, 300 PSIG with a metal bowl
- Flow: 22 SCFM at 90 PSIG inlet and 5 PSIG pressure drop
- Element: 20 micron polypropylene, replacement kit EK504Y
- Bowl: polycarbonate, 1 oz., manual twist drain
- Maximum temperature: 125 F with polycarbonate, 180 F with metal
- Body aluminum, drain brass, seals nitrile. 1.56 in. diameter, 3.78 in. tall, 0.3 lb
Figures are from Parker catalog 0730-2, Parker Watts General Line FRL.
Reading the part number
F504-02AH is the 1/4 in. NPT port (02) with a polycarbonate bowl (A) and a 20 micron element (H). Specify G instead of H for a 5 micron element. No trailing letter means manual twist drain; S is auto pulse and U is semi automatic.
What it will not do
This is a particulate and bulk water filter. It is not a coalescer and it will not take oil aerosol out of the air, so it is the wrong part in front of a paint gun, an air bearing or an instrument. For those, a coalescing element downstream is what you need. Worth saying plainly because a 20 micron filter upstream of a spray booth is a common and expensive mistake.
Service
Drain the bowl before it reaches the baffle, because above that line the swirling air picks the water back up and carries it downstream. Change the element at 10 PSIG drop. Wash the bowl in warm water only; solvents craze polycarbonate and a crazed bowl under 150 PSIG is a safety problem, not a cosmetic one.
Parker Watts F504-02AH miniature compressed air line filter, 1/4 in. NPT, 20 micron, 22 SCFM, polycarbonate bowl with twist drain.
NOTE: Actual product may be different from pictured!
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