Busch model Puma WP0500 Roots vacuum pump. Nominal displacement 500 CUMT/HR. Maximum differental pressure 50 MBAR. Driven by a 2.2KW, 240/415V, 2860RPM electric motor. C an also be supplied as part of a system that includes a Busch model RA0040E vacuum pump, control panel and stainless steel filter pot.