Cardinal transformer-oil pumps

Cardinal transformer-oil pumps are rated for continuous-duty operation at temperatures from –40°F to 212°F. They allow thermo-siphon flow when the pump is not operating, which permits natural convection even when the pump is completely shut off. Along with a rugged split-casing design, the use of heavy-duty class 30 cast iron for the pump casing, motor enclosures, impellers and volutes extends the life of the pump. Large thrust-face sleeve bearings minimize wear and reduce maintenance. Three bearing types are available — a standard sleeve bearing, the manufacturer’s Harley sleeve bearing, and the Harley sleeve bearing with TecSonics bearing-wear monitoring. With two gasket seals on each pump, and no mechanical seals, repair and upkeep are reduced. Durable and resilient, the pumps’ design allows transformer oil flow back through the motor and bearings, thereby providing cooling and lubrication.