Features:. , Spring Loaded Drain Valve for Temperature Applications From -60° C to 230° C with Perfluoro Class VI O-Rings. , Graduation Scale on Both Sides Showing the Approximate Volume. , Sidearm on Lower Drain Valve can be Used with a Standard 3/4” TFE, PFA or Polypropylene Compression Fitting. , All Vessels are Serial Numbered. . Unjacketed reaction vessel with graduation scale on both sides. Vessels are available with our NEW 0-25mm spring loaded drain valve supplied complete with one-piece plug and control knob for temperature applications from -60° C to 230° C. Spring loaded drain valves compensate for temperature related material changes and are designed to provide a constant leak-free seal. The sidearm on the valve is 3/4” Swagelok. Valves are designed to seal flush with the bottom of the flask avoiding the dead space normally associated with stopcock drains. This feature permits total mixing and draining of the contents of the reactor. Reaction vessel is constructed with a f