Mechanical Seal Producer-Design And Repair And Producer Mechanical Seal -Single Seals-Unbalanced-Elastomer Bellows & Conical Spring-Dependent & Independent of direction of rotation-Single Seal ( component & cartridge)-Unbalanced & Balanced-Dependent & Independent of direction of rotation-Single Spring & Multiple Springs & Welded Bellows-Double Seal & Single Seal ( component & cartridge -Unbalanced & Balanced-Independent of direction of rotation-Multiple Springs