Roots pumps series set new standards

Pfeif­fer Vac­u­um, provider of vac­u­um tech­nol­o­gy, is pre­sent­ing the new and inno­v­a­tive Roots pumps of the Hi Lobe series which can be used for numer­ous indus­tri­al vac­u­um appli­ca­tions such as elec­tron beam weld­ing, vac­u­um fur­naces or freeze dry­ing. The pumps of the Hi Lobe series are of par­tic­u­lar inter­est for fast evac­u­a­tions (load-lock cham­bers or leak detec­tion sys­tems). Fur­ther­more, they are suit­able for use in coat­ing applications.

Compact and powerful Roots pumps

The com­pact Roots pumps offer a wide nom­i­nal pump­ing speed range of 520 – 2.100 m³/h. This is made pos­si­ble through the new dri­ve con­cept in con­junc­tion with fre­quen­cy con­vert­ers. Thanks to their indi­vid­ual speed con­trol, the pumps can be pre­cise­ly tai­lored to cus­tomer-spe­cif­ic require­ments. Thanks to this pow­er­ful dri­ve con­cept, the Hi Lobe achieves approx­i­mate­ly 20 per­cent short­er pump-down times than con­ven­tion­al Roots pumps. Rapid evac­u­a­tion reduces costs and increas­es the effi­cien­cy of the pro­duc­tion system.

Process-reliable and cost-efficient vacuum

The main­te­nance and ener­gy costs of the Hi Lobe are >50 per­cent low­er com­pared to con­ven­tion­al Roots pumps. The rea­son for this is a dri­ve with ener­gy effi­cien­cy class IE4 and the spe­cial rotor geome­tries of the pumps. The seal­ing con­cept also con­tributes to this. The pumps are her­met­i­cal­ly sealed to the atmos­phere and have a max­i­mum inte­gral leak­age rate of 1 · 10^-6 Pa m³/s. Dynam­ic seals are elim­i­nat­ed and, as a result, main­te­nance is only required every four years. Due to the inno­v­a­tive seal­ing con­cept in the suc­tion cham­ber, the use of seal­ing gas is super­flu­ous in most appli­ca­tions, which also has a pos­i­tive effect on the oper­at­ing costs. Since the oper­a­tion of the Hi Lobe Roots pumps is pos­si­ble even at ambi­ent tem­per­a­tures of up to +40°C with flex­i­ble air cool­ing, cost-inten­sive water cool­ing is unnecessary.

Con­trol and com­mu­ni­ca­tion are the essen­tial fac­tors for increas­ing sys­tem avail­abil­i­ty. The intel­li­gent inter­face tech­nol­o­gy of the Hi Lobe allows very good adap­ta­tion and mon­i­tor­ing of the process­es. This facil­i­tates antic­i­pa­to­ry and effi­cient work. By inte­grat­ing such con­di­tion mon­i­tor­ing, infor­ma­tion about the con­di­tion of the vac­u­um sys­tem is always avail­able. In addi­tion, con­di­tion mon­i­tor­ing increas­es sys­tem avail­abil­i­ty allow­ing users to plan main­te­nance and repair mea­sures in a use­ful and antic­i­pa­to­ry way and pre­vent cost-inten­sive pro­duc­tion down­times. These advan­tages lead to a long ser­vice life and max­i­mum oper­a­tional safe­ty. Depend­ing on their suit­abil­i­ty for the exist­ing sys­tem, the Hi Lobe vac­u­um pumps can either be aligned ver­ti­cal­ly or hor­i­zon­tal­ly. This allows max­i­mum pump­ing speed and a more cus­tomized and effi­cient use of space at the customer’s pro­duc­tion site.