Gaskets

The prime requirement for satisfactory sealing with Grafoil gaskets is sufficient unit load on the gasket at all times and at all points on the gasket. If surfaces are maintained flat and within 0.005 inches and are held to a surface finish of 125 RMS or better, Grafoil gaskets will seal hydrostatic pressures as shown on the graph "Leak Pressure vs. Gasket Unit Load for Grafoil Gaskets." For example, a Net Unit Load of 7,000 p.s.i. will seal up to 3,150 p.s.i water pressure.