Denso 294198-0020 High Pressure Fuel Pump Seal

The Denso 294198-0020 is a precision-engineered sealing component designed for the HP4 series high pressure fuel injection pumps. Manufactured to OEM specifications using high-grade hydrogenated nitrile butadiene rubber (HNBR) or fluoroelastomer (FKM) materials, it ensures reliable sealing performance under extreme fuel pressures up to 200 MPa and elevated operating temperatures. This component serves as a critical seal within the pump assembly, preventing fuel leakage and maintaining injection pressure integrity. It is a direct replacement part for Denso HP4 pumps commonly equipped on Isuzu 4HK1 and 6HK1 series diesel engines found in construction machinery and commercial vehicles. Installation requires clean fuel system protocols to prevent contamination.