2504 DVJ Whispair™
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 20” HgV with a single stage unit.Standard dry vacuum exhausters are limited to approx. 16” Hg vacuum because operation at higher vacuum levels can cause extreme discharge temperatures resulting in casing & impeller distortion and possible seizure. The DVJ’s cooling design eliminates the problems associated by high discharge temperatures at vacuum levels beyond 16” Hg. DVJ WHISPAIR™ vacuum pumps are heavy-duty units with integral-shaft ductile iron impellers. The casing, headplates, gear cover are grey iron. Carburized andground alloy steel spur timing gears are taper mounted on the shafts, secured with a locknut. Ball bearings are splash lubricated at the gear end and grease lubricated at the drive end. Lip-type seals are used to restrict oil leakage into the air stream.