TopGear provides reliability through thick and thin

Johnson Pump's Top Gear range of pumps is designed for smooth, uninterrupted production and minimum downtime.

It provides capacities ranging from 0.5m3/hr up to 125m3/hr at pressures up to 20 bar.

The pumps fall into three categories: the L range for low viscosity, high efficiency; the G range for general purpose liquids transfer; and the H range for more demanding applications.

The smooth and efficient flow of thick or thin liquids has been achieved by optimising the teeth profile in the integral gear section. The company says the pumps' simple yet effective operating principle starts with the rotor and idler un-meshing, creating an under-pressure with the liquid entering the newly created cavities. Liquid is transported in sealed pockets to the discharge side of the pump. The walls of the pump casing and the crescent create a seal that separates suction from the discharge side. Finally, the rotor and idler mesh together and liquid is pushed into the discharge line.

Downtime and maintenance are kept to a minimum thanks to the front and back pull-out panels and the simple cartridge design, while a compact rotor, strong shafts and maximised bearing designs ensure long service. A range of options are offered, including: packed gland, single and double mechanical, lip and cartridge seals, heating and cooling jackets and single and double safety relief valves.