Self Adjusting 7500 Series CinchSeal Shaft Size 3.0"

Our 7500 Series CinchSeals are designed for zero maintenance due to the unique self adjusting design. These are ideal for screw conveyors, bucket elevators, and similar bulk solid applications. The 7500 Series consumes 30% less power than packing seals and will not undercut shafts. Fully assembled and possessing a rugged modular design, our 7500 Series will not leak to foul bearings or contaminate processing areas. The key component in the 7550 solid seal is the elastomer which is molded out of a special silicon material that can handle temperatures up to 400F. The elastomer is molded slightly smaller than the shaft size so that an interference fit is achieved. It is the interference fit of the elastomer and shaft that not only seals the shaft so product can't migrate past and leak out, but it also causes the internal seal parts to turn with the shaft so that damage to the shaft is eliminated. As the elastomer turns with the shaft it drives a pair of PTFE mineral filled rotor cups against two stationary faces to form the primary seal. The fact that CinchSeal turns with the shaft is what makes it unique and superior to rope packing and lip seals that are stationary and have the shaft turning through them which lead to scored shafts. As the shaft turns, the elastomer drives two PTFE rotor cups that are being compressed with the optimum face pressure against a stationary face. It is the face pressure between the rotating faces and the stationary faces that stops material from leaking by. The PTFE rotor cups are the softer and sacrificial part of the seal, and are designed to wear and be replaced. Inexpensive re-build kits, which consist of a new elastomer and two new PTFE rotor cups, can be installed in minutes. CinchSeal is an air purged seal that performs best when purged with 5 to 8 PSI of air over vessel pressure.