The rotating face mechanical seal principle is adaptable to serve a tremendous number of sealing needs standard mechanical seals can suit most requirements-including temperatures and shaft speeds through the choice of secondary seal and the combination of seal and seal face materials which are offered. Seals can be ordered in balanced configurations to seal pressures or used in a multiple for extremely high pressures or especially severe fluid services. Special mechanical seals can be furnished to meet the most demanding of industrial applications considering pressure, temperature, speed or fluid.