In contrast to Type 32, the Type 32i features a unique, patented, seal face technology called “Intelli-Face®.” It is designed to reduce audible noise and squealing found on some single-contacting dry-running seal applications. Intelli-face technology applies non-uniform stresses on the carbon primary ring in order to modulate frequency harmonics and seal face flatness. This results in a continuously self-adjusting interruption in resonance and quiet seal operation.