These radial style distillation receivers allow four flasks to be progressively filled and maximize flask capacity compared to traditional "cow" style receivers. The upper vacuum adapter is bent at a 105 degree angle. The complete item consists of a vacuum adapter, distribution adapter, four of the listed size flasks with hooks and ten CG-110 stainless steel springs. Individual components are also available. The approximate dimensions are 413 mm high x 160 mm wide for the 24/40 system and 210 mm high x 90 mm wide for the 14/20 system. The replacement 15 mL flask is item # CG-1507-05. For a similar model that attaches vertically, see item #CG-1281.
Application note: Some vacuum distillations need to be performed at a specific pressure rather than full dynamic vacuum. To maintain a relatively low vacuum (~2-50 torr), once can use an adjustable bubbler such as item #AF-0513-A-21 as a low-tech vacuum control (manostat). For those situations where you need to operate at pressures as high as 760 torr or want to avoid the use of mercury (a good idea), consider a Mano-Watch™ vacuum controller/monitor, item #20900-A.