Daemar Inc. Mechanical Seal Disc Springs 3717

Most single spring mechanical seals come in two parts: The “Head” & the “Seat”. The Head is part of the spring assembly and it usually mounts on the shaft. The Seat is not part of the spring assembly and usually mounts in the bore. Cup Gasket - Provides secondary sealing around the seat and maintains the position of the seat so that it properly mates with the seal face. Stationary Face - The mating ring against which the seal face runs. Must be finished in the same manner as the rotary face. Rotary Face - The rotary face is finished to a specified degree of flatness and smoothness and provides a leak-proof running joint. Bellow - Type A & B - provides a seal at the shaft. Type C, D & E - provides a seal at the shaft surface and a friction-drive connection between the shaft and seal assembly. Spring Retainer - Positions and centres the spring, aiding the concentricity between the spring and shaft. Spring - Provides positive pressure for the sealing between the sealing faces. Drive Ring - Controls fit of the bellow to the shaft for proper friction drive. Type A Drive Ring mates against the shaft for friction drive. Retainer - Maintains contact with the bellow and provides positive drive to the Rotary Face. D1 - Shaft Diameter D3 - Seal Head O.D. L1 - Seal Head Operation Height (OP. HT.) D2 - Seat O.D. L2 - Seat Thickness