OPERATION
XL-65 and XL-65HP
Component
Locations
The XL-65/65HP will store up to 240 liters of product. The two cylinders can deliver either
liquid or gas. The following component and circuit descriptions are pertinent to the opera-
tion of all the containers and should be read before attempting operation. The components
may be identified on the Component Location Illustration.
Internal Vaporizer –
A liquid container for gas service must have an internal heat ex-
changer that functions as a gas vaporizer coil to convert liquid product to gas continu-
ously during withdrawal. The XL65-XL65HP utilize an internal heat exchanger that is in-
side the vacuum space attached to the container’s outer casing. It provides a mean of
introducing heat from outside the container’s insulated jacket, to vaporize liquid as gas-
eous product is withdrawn. The capacity of this circuit is sufficient to vaporize at flow rates
up to 350 cfh @ NTP (9.2 cu.m/h @STP). If a greater continuous demand is put on the
vaporizer, an external vaporizer should be added to properly warm the gas and avoid
malfunction, or damage, to gas regulators, hoses, and other downstream components.
Pressure Building –
A Pressure Building circuit is used to ensure sufficient driving pres-
sure during high withdrawal periods. This function is actuated by opening a hand valve that
creates a path from the liquid in the bottom of the container, through the Pressure Building
Regulator, to the gas space in the top. When the pressure building valve is open, and the
container pressure is below the pressure building regulator setting, liquid taken from the
inner container is vaporized in a heat exchanger which is inside the outer casing. The
expanding gas is fed into the upper section of the container to build pressure. The result-
ing process will drive either the liquid or gas delivery system.
