Product Line Details

ROOTS™ DVJ WHISPAIR™ dry vacuum 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.

Standard dry vacuum exhausters are limited to approximately 16″ Hg vacuum because operation at higher vacuum levels can cause extreme discharge temperatures resulting in casing and impeller distortion and possible failure. The DVJ vacuum exhauster’s integral cooling design eliminates the problems caused by high discharge temperatures at vacuum levels beyond 16″ Hg.

The basic model is designed using integral-shaft ductile iron impellers with an involute profile. The casing and headplates are grey iron, while the drive end cover and gear cover are aluminum. Carburized and ground alloy steel spur timing gears are taper mounted on the shafts, secured with a locknut. Cylindrical roller bearings are splash lubricated at both the gear end and the drive end.

Piston rings reduce air leakage through the headplate bores and lip-type oil seals prevent lubricants from entering the air chamber. Units can be equipped with mechanical seals for gas applications.

Frame Free Air Flow (CFM) Inlet Conn Disch Conn Jet Conn Nmax (RPM) Shaft Dia(in) Max ΔT (°F) Max Vac (Hg) Weight (lbs)
2504 170 2.5″ FPT 2.5″FPT 2″FPT 4970 0.75 250 20 65
406 668 4″ FPT 5″FPT 4″FPT 4000 1.5 275 27 365
412 1332 6″FLG 6″FLG 5″FLG 4000 1.5 300 27 575
616 2367 8″FLG 10″FLG 8″FLG 3000 2 300 27 975
721 3658 12″FLG 12″FLG 12″FLG 2600 2.375 260 27 1750
1016 4068 12″FLG 12″FLG 10″FLG 1800 2.25 275 27 2400
1021 5184 14″FLG 14″FLG 12″FLG 1800 2.25 300 27 2525
1220 5910 16″FLG 14″FLG 12″FLG 1500 2.625 275 27 3650
1222 6645 16″FLG 14″FLG 12″FLG 1500 2.625 275 24 4000
1428 9789 20″FLG 18″FLG 16″FLG 1300 3 300 22.5 5900
1431 11011 20″FLG 18″FLG 16″FLG 1300 3 300 22 6100
1639 16154 24″FLG 24″FLG 20″FLG 1130 3.562 300 18.5 7800
1643 17806 24″FLG 24″FLG 20″FLG 1130 3.562 300 16.5 8000
1833 14870 24″FLG 24″FLG 20″FLG 1000 4.188 300 24 10500
1838 16870 24″FLG 24″FLG 20″FLG 1000 4.188 300 22.5 10800

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