APV 0356471688 is an OEM mechanical seal reference for a double, water-flushed seal arrangement in APV W pumps. The listed pump models are APV W 50/50, 50/100, 60/300, 70/30, 80/50, 100/130, 30/100, 25/200. The referenced specification lists a 35 mm shaft diameter, a carbon rotating face and a silicon carbide (SiC) stationary face, and NBR elastomers. The corresponding KE MOTION HYDRO product reference is NT W/NM-4.