RAM™ DVJ Dry Exhausters

ROOTS™ RAM™ DVJ WHISPAIR™ dry exhausters have an exclusive discharge jet plenum design which allows cool, atmospheric air to flow into the cylinder. This unique design permits continuous operation at vacuum levels to blank-off with a single stage unit.

More Information

Warranty

gts_5001_020107.pdf

Features

Single stage operation to 27" HgV
No valves, vanes or Teflon rings to wear
Alloy steel timing gears
Cylindrical roller bearings
Piston ring air seals
Lip-type oil seals (optional mechanical seal)
Splash oil lubrication
Horizontal and vertical configurations available

Engineering Resources

Engineering resources:
Vacuum curves: ramdvj_drwg_vcurve.pdf,
Dimension drawings: ramdvj_drwg_dimenisons_imp.pdf,
Assembly drawings: ramdvj_drwg_assmbly.pdf,
Parts lists: ramdvj_tab_partslist.pdf

Operating Principle

Incoming air is trapped between the impellers. Simultaneously, pressurized air is being discharged. As the upper impeller passes the jet plenum, cooled, pressurized air flows into the space between the impeller and cylinder. This cools the trapped air, helps control thermal growth and allows higher discharge pressures. The trapped air is then moved into the discharge flange. Backflow is reduced, resulting in lower operating noise level and reduced shock loading on the impellers.

dvj_princ_op.pdf

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