Series 4605-4626 High Pressure Vessels 600 & 1200 mLHigh Pressure 4605 Series Vessels are available in volumes of 600 and 1200 mL. Using the flat PTFE Gasket, these vessels can obtain temperatures up to 350 °C with a maximum pressure of 5000 psi (350 bar). They come standard with a Split Ring closure with 8 cap screws, and the choice of two different head styles: a 1/8? NPT w/plug, or a VGR (Valve, Gage, and Rupture Disc) with Thermowell. A maximum of 5 to 7 openings are allowed on the heads of these vessels. These vessels are available as either a moveable or fixed head design.