Vane Pumps
Vane pumps use GRAPHITAR® vanes, end plates, liners and rotors. For best performance, vanes are machined for a close-tolerance fit between vane and rotor, a radiused contact edge and an exact length.
Piston Pumps
GRAPHITAR® parts have been successfully used in reciprocating pumps. Pistons, piston rings and valve plates of GRAPHITAR® give longer life and positive sealing in applications where lubrication problems prohibit the use of other materials.
Service Life
Properly designed and assembled, GRAPHITAR® pump components can be expected to show virtually no mechanical wear after a very short run-in period - provided their mating surfaces are hard and smooth.
Molding
All GRAPHITAR® parts consist of graphite and carbon powders, molded to the desired shape under tremendous pressure and furnaces above 2000°F. Any contour on the outside and inside diameters, provided it is the full length of the part, can be formed.
Size Limits
The maximum size of a single GRAPHITAR® component is limited by USG's press capacity. Since the pressure required to mold each grade to its optimum physical properties varies, the maximum project area of GRAPHITAR® parts may change according to grade.
Standard Tolerances
GRAPHITAR® parts are generally machined to a standard tolerance of .004" on most dimensions. Parts can be made to tolerances as small as .0002 with special techniques.