Shimadzu, 228-55272-41, PTFE Diaphrams 2/pk, LC30AD/i-Series, LC-40

Shimadzu PTFE Pump Diaphragms are replacement flexible components for designated Nexera and integrated liquid chromatography pumping assemblies. The package contains two polytetrafluoroethylene diaphragms used in the relevant pump service position, including LC-30AD, selected i-Series instruments and LC-40 family configurations. A diaphragm provides a chemical-resistant barrier within the pump mechanism; wear or mechanical damage may contribute to inconsistent function or leakage around the serviced assembly. During scheduled maintenance, stop the pump, relieve pressure, remove residual mobile phase and examine related seals and plunger components for damage. Install both replacements only where the relevant maintenance schedule or service condition requires them. Check fit against the actual instrument variant rather than treating all LC pump diaphragms as interchangeable. These PTFE pieces are not 0.2 µm liquid-filtration membranes, syringe filter discs or full plunger holder assemblies. The product supplies the diaphragms as maintenance parts without a complete replacement pump.