Ross 228K77 Service Kit

Ross 228K77 Service Kit is a gasket and seal kit for Ross Controls 21 Series poppet valves, identified by kit number 228K77. It is used to replace worn gaskets, seals, and related sealing components during valve maintenance to restore leak-tight performance across the 21 Series, including high- and low-temperature configurations. In Ross documentation, the 228K77 kit is paired with the 237K77 Valve Body Kit as part of a complete service solution for 21 Series valves. Contents focus on gaskets and seals matched to the 21 Series valve geometry, and, per Ross, the kit may include parts not required for every service depending on the specific valve and configuration. Typical applications are in industrial pneumatic control systems employing 21 Series poppet valves, where a rebuild with the 228K77 kit helps maintain reliable actuation and sealing in demanding environments.