ROOTS™ DVJ WHISPAIR™ Dry Vacuum Exhausters

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	Inlet Conn	Disch Conn	Jet Conn	Nmax	Shaft Dia(in)	Max ΔT	Max Vac	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	2.0	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	2900
1021	5184	14"FLG	14"FLG	12"FLG	1800	2.25	300	27	3000
1220	5910	16"FLG	14"FLG	12"FLG	1500	2.625	275	27	4200
1222	6645	16"FLG	14"FLG	12"FLG	1500	2.625	275	24	4200
1428	9789	20"FLG	18"FLG	16"FLG	1300	3.0	230	22.5	6600
1431	11011	20"FLG	18"FLG	16"FLG	1300	3.0	230	22	6800
1639	16154	24"FLG	24"FLG	20"FLG	1180	3.562	230	18.5	7800
1643	17806	24"FLG	24"FLG	20"FLG	1180	3.562	230	16.5	8000
1833	14870	24"FLG	24"FLG	20"FLG	1000	4.188	230	24	11100
1838	16870	24"FLG	24"FLG	20"FLG	1000	4.188	230	21.5	11400