Z5157 is a Champion replacement valve set designed for the R30D (Gardner Denver) air compressor, also cataloged as 22NN88. The kit includes the essential valve components—high‑pressure exhaust valve, high‑pressure suction valve, low‑pressure exhaust valve, low‑pressure intake valve—and a gasket set to seal the valve train. Made in the USA, it is compatible with Champion R30D models and related R30 variants within the Champion/Gardner Denver family. The part is listed under Mfr Part Number Z5157 (also 22NN88) and is intended to replace worn valves and gaskets in a single unit.
