APV 0356479780 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, tungsten carbide (TC) rotating and stationary sealing faces, and FKM (Viton) elastomers. The corresponding KE MOTION HYDRO product reference is NT W/NM-4.