Lightnin 70 Series
Lightnin Series 70 - The Workhorse
In the seventies, Lightnin began manufacturing their own line of reducers specifically designed for mixing service.
Prior to this, they used off-the-shelf gearboxes meant for all types of torque transmission uses, but Lightnin required a reducer with the capability to handle the unique bending moment loads and fluid forces imposed by mixing impellers.
The 70 and 80 Series reducers that were developed are right angle drives with spiral bevel gearing. Reducers are 98.5 % efficient per reduction stage.
These reducers contain a rugged oversize low speed shaft and bearings, typically with service factors in excess of 2 and an L-10 life in excess of 200,000 hours
With 7 distinct torque sizes, the 70 Series mixers range from 1 HP to 100 HP, from 11 RPM to 280 RPM.
Reducers are either double or triple reduction, with a change gear feature enabling the user to change mixer speed easily without the need to remove the gearbox from the top of the tank.
70 Series mixers are available in three main configurations - open tank, stuffing box and mechanical seal. Open tank mixers typically bolt to mounting beams that straddle the tank while the two closed tank options mount directly to either a pad flange or tank nozzle.
A wide range of mechanical seals style are available, but the Lightnin Style C double mechanical seal contains a bearing in the seal cartridge to minimize shaft deflection at the seal faces.
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Over 30,000 of the 70 Series reducers have been placed in service, making this reducer the most specified, most used, most proven mixer technology in the world.
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