A company which specializes in transformer monitoring for electric utilities searched the global pump market for a specialty oil pump. Their transformer monitor uses state of the art gas chromatography technology to accurately measure critical fault gases trapped within the transformer cooling oil. This data is monitored on a continuous basis, and is then correlated with electric system parameters. The information gives system operators early notification of a variety of incipient fault events that can lead to transformer failure. They needed an oil transfer pump to circulate the transformer cooling oil continuously through the monitoring system without affecting the oil analysis.



Cascon designed a custom gerotor pump for seamless integration into our customer’s product. All parts are designed to be manufactured economically by Cascon in the USA at quantities which support their production needs. Critical design features include:

  • Canned rotor design which eliminates the rotary shaft seal and the possibility of leaks
  • Manifold mount with SAE o-ring ports
  • 8-pole neodymium brushless dc motor for a long maintenance-free life
  • Rotor speed feedback that can be used for closed-loop servo control
  • Hardened steel shaft supported by journal bearings
  • Housings machined from heat treated aluminum alloy
  • Teflon impregnated hard anodized finish for superior corrosion protection and durability in harsh environments
  • Integral 24-vdc brushless dc drive motor


Select Performance Data:

Fluid: Shell Diala AX
Flow Rate: 250 cc/min
Temperature Range: -15°C to +120°C
Operating Pressure: 50 psid
Operating Speed: 750 rpm
Operating Voltage: 24 vdc
MTBF: 40,000 hours
Duty Cycle: Continuous