Shimadzu, 228-45574-95, Drain Valve Assembly, LC-20AD, LC-2030, LC-40D

Shimadzu drain valve assemblies are replacement parts for the pump drainage and purge-fluid pathway in compatible liquid chromatography systems. This assembly is listed for the LC-20AD, LC-2030 and LC-40D pump families, subject to the specific instrument configuration and service documentation. A correctly operating drain valve supports the prescribed solvent-purge and pressure-release processes and helps avoid leakage around the pump's drain path. Symptoms that warrant inspection may include persistent solvent leakage, abnormal purge behavior or difficulty achieving the required pressure after priming. Before service, stop the pump, relieve hydraulic pressure and route solvent waste safely. Inspect the valve seating and connected fluid paths, replace the part following the relevant service manual, and verify proper operation during priming and pump-pressure tests. The assembly is supplied as one replacement unit. Do not confuse this drain-valve configuration with a similarly named shaft-only part or a valve intended for a different pump family.