Yamada Corporation K225-AM Air Motor Reseal Kit

The Yamada Corporation K225-AM Air Motor Reseal Kit is a complete repair kit for Yamada AODD diaphragm pumps, designed to restore seals, gaskets, and internal air motor components to keep diaphragm actuation reliable. It is used with Yamada NDP-20 and NDP-25 series pumps, where maintaining proper air motor sealing and airflow is critical for continuous operation. The kit includes seal rings, O-rings, gaskets, cushions, springs, pilot valve seats, bushings, and pilot valve assemblies, and is manufactured from Buna-N elastomers, PTFE, nylon, and other composite materials. Installation takes place in the internal air motor section of the pump, and the kit is intended for preventative maintenance and complete reseal of the air motor. Typical weight is about 3 lbs. The K225-AM is an active OEM replacement kit, with common replacements including K225-AP, K32-AM, and K5-AM repair kits. Applications span industrial fluid handling environments where AODD pumps operate under high-cycle conditions, such as chemical processing, wastewater treatment, coatings, and fluid transfer, where preserving diaphragm movement and stable flow output minimizes downtime.