Abstract: A collar for use on a water filtration tank adapter. The collar is formed as a ring adapted to thread onto the tank connection end of the adapter and abut the nut portion between the tank connection end and the pipe end of adapter. An o-ring, square in cross-section, is disposed on a top surface of the collar, offset medially towards the center. This top o-ring is adapted to abut the nut portion of the adapter. Another o-ring, square in cross-section, is disposed on the bottom surface, offset medially away from the center. This bottom o-ring is adapted to abut the tank head upon use. Accordingly, a water-tight seal is formed at the tank connection end and tank head, the collar functioning as both a positive stop and as a substitute for pipe tape.

Abstract: A collar for use on a water filtration tank adapter. The collar is formed as a ring adapted to thread onto the tank connection end of the adapter and abut the nut portion between the tank connection end and the pipe end of adapter. An o-ring, square in cross-section, is disposed on a top surface of the collar, offset medially towards the center. This top o-ring is adapted to abut the nut portion of the adapter. Another o-ring, square in cross-section, is disposed on the bottom surface, offset medially away from the center. This bottom o-ring is adapted to abut the tank head upon use. Accordingly, a water-tight seal is formed at the tank connection end and tank head, the collar functioning as both a positive stop and as a substitute for pipe tape.

Abstract: A mechanical seal of the cartridge type for a cryogenic pump. A stationary subassembly attaches to a pump casing, the stationary subassembly running against the flat surface of a rotary subassembly to thereby provide a sealing face. The stationary subassembly defines an inner seal cavity and further comprises a gland and a packing plate attached to the gland, the packing plate having a front face and back face, wherein the back face is angled to be non-parallel with the front face such that ice and moisture from the cryogenic pump is directed away from the inner seal cavity. A shroud over the drive ring for sealing disposition against the shaft shields ice and moisture ingress into the inner seal cavity. Lock wire holes defined within the collar screw and drive collar allow a lock wire to prevent loosening of the collar screw to prevent sparking.