VHS-6-ASY-208V Diffusion Pumps Overview New Varian Style Diffusion Pump Heaters Product Detail (Click to Enlarge) Overview Varian Model VHS-6/VHS-250 DP Replacement Stovetop Heater, Full Assembly 208V/2200W/10.6A. Discontinued. See platen heaters. Order Part This product is no longer available.