Large rotary lobe pump for sensitive products

Gea is expand­ing its Noval­obe pump range with the large-vol­ume Gea Hilge Noval­obe 60. The robust rotary lobe pump is specif­i­cal­ly designed for pump­ing and dos­ing high­ly vis­cous media, also with large par­ti­cles. This new devel­op­ment meets the hygiene stan­dards of the EHEDG guide­lines for appli­ca­tions in the phar­ma­ceu­ti­cal, chem­i­cal and food industries.

Durable, flexible and easy to maintain

The Hilge Noval­obe is part of the Varipump line – which stands for ver­sa­til­i­ty and flex­i­bil­i­ty. All pumps of this line can be eas­i­ly con­vert­ed. The Prod­uct Man­ag­er adds: “Our cus­tomers want pumps that can be used extreme­ly flex­i­bly for var­i­ous media and pump­ing require­ments, and that are robust and opti­mized in terms of oper­at­ing costs.” That is why the pump experts at the Gea cen­ter of excel­lence in Boden­heim have cho­sen a com­pact and robust design. Through the pump’s robust con­struc­tion, the shaft over­hang and clear­ance in the pump have been min­i­mized. The pump’s com­pact design and the rigid shaft geom­e­try reduce the risk of galling to an absolute minimum.
A year of suc­cess­ful­ly field-test­ing the Noval­obe 60 in a sug­ar fac­to­ry con­firms its strengths in dai­ly oper­a­tion: Pro­duc­tion man­agers at the fac­to­ry found it easy to oper­ate the rotary lobe pump and wear­ing parts could be replaced with­out any retro­fitting. The inter­nal mechan­i­cal seals can be replaced from the front with­out remov­ing the pump. These seals are lubri­cat­ed and cooled opti­mal­ly, there­by sig­nif­i­cant­ly extend­ing the prod­uct life time. The com­pa­ny ensures hygien­ic clean­abil­i­ty and ster­il­iza­tion with its choice of seals, extreme­ly high sur­face qual­i­ty (up to Ra ≤ 0.4 µm) and com­plete drain­abil­i­ty in ver­ti­cal position.

Patented rotor mounting design

When the pump is run­ning, the extreme­ly qui­et oper­a­tion is clear­ly notice­able. The com­pa­ny achieves this with its patent­ed rotor mount­ing design. Pre­ci­sion-ground cylin­ders for the loca­tion and accu­rate con­nec­tion of rotors and shafts min­i­mize clear­ance and reduce vibra­tions as well as noise. Var­i­ous rotor pro­files are avail­able for the Noval­obe depend­ing on the appli­ca­tion: The sin­gle-blad­ed “uni-wing” is suit­able for very doughy media con­tain­ing large par­ti­cles. The twin-blad­ed “bi-wing” rotor is the robust stan­dard vari­ant for most appli­ca­tions. A round­ed, four-lobe rotor “mul­ti­lobe” helps to con­vey shear-sen­si­tive prod­ucts at low pulsation.