Add to Cart Quick view Welch Duo-Seal Belt-Drive Vacuum Pump with Dayton 3/4 HP 115/220 Volt-AC Motor Welch Was: $740.00 Was: $1,152.00 Welch Duo-Seal Belt-Drive Vacuum Pump with Dayton 3/4 HP 115/220 Volt-AC Motor Note from manufacturer: The pump produces its best vacuum ( < .05 micron) at 300 r.p.m. Dayton 6K376D Phase-1... 46991 SKU: 46991 Weight: 230.00 LBS