This Cylinder/Inlet Flange Gasket (Part #48021700) is a replacement part designed for Busch R5 RA 0025 and RA 0040 series vacuum pumps, including the C, E, and F versions . Its job is to create a leak-tight seal between the pump’s cylinder and the inlet flange . This gasket is a standard component in the official Busch repair kit (Part #0992101463) . A properly sealed cylinder is critical for maintaining vacuum pressure and preventing air leaks.
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