Today's processing industries need...
The new generation of Rotary Lobe Pumps

Johnson Pump has developed the TopLobe, a rotary lobe pump with radical design improvements for faster maintenance and easier, more effective cleaning, leading to less process downtime. TopLobe is designed to handle the most demanding applications in today’s processing industries.

The original design of the rotary lobe pump goes back to the early 40’s and has since then been further developed and improved. Through 20 years of research and development in combination with marketing know-how, Jobnson Pump has improved the well known and accepted rotary lobe pump concept. During this time, the company has been behind several innovations and launches in the rotary lobe business. The group’s dedication to product development has culminated in the TopLobe, a new design of stainless steel rotary lobe pumps that overcomes the compromises and constraints associated with the application and use of conventional lobe pumps. Delay and disruption to any process lines, whetver it is in the food, pharmaceutical or chemical industry, is a costly affair.

From know-How...
TopeLobe is a traditional rotary lobe pump that has been developed to be able to handle demands from process industry of the modern era.The position and method of assembling the product seal and gearbox assemblies within the TopeLobe pump means that mainte-nance of any sort, whether it’s replacing product seals components or servicing the gearbox assemble can be carried out signifficant quicker than with conven-tional rotary lobe designes. Flush front cover and rotor retention device, incorporating spline sealing, combine with fully swept pump chamber and optimum product seal positioning to ensure minimum product entrapment within the pump head for effective cleaning. The TopeLobe rotor form improves pump efficiency while minimising product degradation from the effects of shear. In addition to low shear and pulse characteristics this rotor form gives smooth flow and good solids handling capacity. The involute form shaft spline provides accurate location, positive drive and a unique position for rotor location thus avoiding the possibility of incorrect rotor assembly. The precise relationship between shaft spline, rotor spline and rotor profile ensures rotor interchangeability. Single point shimming provides for quick and easy adjustment of rotor clearances. When required this can be done while the pump stays on line in the system. Universal mounting of the pump is available by incorporating removable flexi feet fixed directly to the gearbox. This gives total flexibility of mounting attitude and drive shaft configuration. Suction and discharge ports in both horizontal and vertical plane can be selected, as can top or bottom drive, without modification or rebuild of the pump. When adding to this a new way of thinking for placing the displacements in between the families reaching high performance pumps 22 bar DIN normed, seals single ore double, one can really talk about a flexible pump series.
Finally, this is a total upgrading of material of the TopLobe series; the company only uses low carbon materials in the wetted parts to be able to meet demands mainly from the pharma-ceutical industry. To reduce wear in important parts they use low carbon duplex stainless steel. This is also to reduce deflexion of the shafts which is important for the total quality and perfomances of the TopLobe series.