Storage dewars used purely for holding samples are typically vented and kept close to atmospheric pressure, since they are not designed to dispense liquid nitrogen under pressure. Pressurised dewars used for dispensing or transfer operate at settings specified by the manufacturer for that particular model, often adjustable within a defined range depending on how quickly liquid needs to be moved. There is no single universal figure that applies across all equipment, so the correct pressure should always come from the tank’s own documentation and manufacturer guidance. Cryolab’s CryoCrest liquid nitrogen dispensers are supplied with clear operating parameters and safety guidance, and our technical team is available to talk through pressure settings, servicing intervals and troubleshooting for any tank we supply or maintain.