Parker Watts L508-02A Miniature Mist Lubricator, 1/4 in. NPT
Air tools and cylinders that were designed to run lubricated will run dry for a while and then stop running at all. Vanes glaze, seals dry out and tear, and a rotary tool that should have lasted five years is scrap in eighteen months. The L508 is the small mist lubricator that meters oil into the air stream so that does not happen.
Published specification
- Port size: 1/4 in. NPT
- Maximum inlet pressure: 150 PSIG with the polycarbonate bowl, 300 PSIG with a metal bowl
- Flow: 20 SCFM at 90 PSIG inlet and 5 PSIG pressure drop
- Minimum flow to start lubricating: 0.5 SCFM at 100 PSIG
- Bowl: polycarbonate, 1 oz.
- Temperature: 32 F to 125 F with polycarbonate, 40 F to 150 F with metal
- Body aluminum, polyurethane sight dome with 360 degree visibility, nitrile seals, 0.4 lb
- Recommended oil: Parker F442 or a petroleum oil of 100 to 200 SUS at 100 F with an aniline point above 200 F
Figures are from Parker catalog 0730-2, Parker Watts General Line FRL.
About the drain
L508-02A is the no drain build. The X9 suffix adds a manual twist drain. Check which one came off the machine before ordering, because the catalog column headings for this pair were printed in the opposite order in the older 0305-2 sheet and the confusion has followed the part around ever since. The ordering chart in both catalogs is consistent on one point: X9 is the drain.
Setting it
Run the tool at its normal duty and open the needle valve until you see one to three drops a minute in the sight dome. More is not better. Excess oil fogs the line, coats everything downstream, and ends up on the floor and on the work. Below about 0.5 SCFM the venturi does not develop enough signal to lift oil at all, which is why a lubricator on a line feeding one small intermittent cylinder often appears to do nothing.
Do not use it here
Never put a lubricator upstream of a dryer, a desiccant bed, a coalescing filter or anything with an air motor rated for oil free service. Oil ruins desiccant and plugs coalescing elements.
Parker Watts L508-02A miniature mist lubricator, 1/4 in. NPT, 20 SCFM, polycarbonate bowl, for point of use lubrication of air tools and cylinders.
NOTE: Actual product may be different from pictured!
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