Shop Home / Shop View cart “John Crane T502 100 mm Mechanical Seal – Silicon vs Silicon Carbide Viton Elastomers” has been added to your cart. Cartridge Mechanical Seals (13) Double Mechanical Seals (5) John Crane (16) Mechanical Seals General (150) Single Spring Mechanical Seals (54) Expanded PTFE Joint Sealant (7) Gland & Stuffing Box Packing (26) Cyclone Separators (2)