1 Unused ABEC 500 Litre – 316 Stainless Steel Vacuum Jacketed Vessel. National board number: 1690. Manufactured in 2018 – still in OEM crate. Vessel MAWP: 45 psi at 350°F. MDMT: -20°F at 45 psi. Internal: MAWP: 150 psi at 350°F. MDMT: -20°F at 150 psi. Comes with mixer, and load cells.