Unifin International

Cardinal valves
To perform reliably under extreme operating conditions, the Cardinal valves are rated for temperatures ranging from –40°C (–40°F) to 100°C (212°F). All parts are made from non-corrosive or a suitably protected material to withstand outdoor exposure on external surfaces and hot transformer oil on internal surfaces. Cardinal valves are robust in design, so that over-tightening or minor abuse encountered in handling or during factory/field installation will not result in valve malfunction. The fasteners are designed to prevent loosening under normal operating conditions. The operating handle displays the valve’s open and shut position and can be manually locked in either position. Cardinal valves are designed for use on new transformers or as replacements on existing electrical transformers. Cardinal valves are available in sizes ranging from 2 in. to 8 in., including ANSI standard and OEM-specific flange configurations

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.