CHART Cryo-Cyl80HP, Руководство по эксплуатации продукта

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13
Introduction Product Manual - Liquid Cylinders
Figure 11
Gas Withdrawal
When a Dura-Cyl
®
LP or MP Liquid Cylinder is used for
gas withdrawal, the normal operating pressure range is from
approximately 75 to 175 psig and the pressure relief valve
has a set pressure of 230 psig. When a Dura-Cyl HP liquid
cylinder is used for gas withdrawal, the normal operating
pressure range is from approximately 100 to 350 psig and
the pressure relief valve has a set pressure of 350 psig. On
both liquid cylinders the economizer portion of the control
regulator is automatically set approximately 15 psig higher
than the pressure building portion of the control regulator.
Warning! Before conducting a gas (or
liquid) withdrawal operation,
make sure protective eyeglasses
and gloves are being used.
The supply of gaseous product is the primary operation
of the liquid cylinder An additional regulator must be
added to the gas use valve to step down the pressure to the
application. The liquid cylinder is usually at a high pressure
after the filling and delivery operation. When it is connected
to the gas application and the gas use valve and pressure
building valves are opened, it will automatically deliver gas.
The Dura-Cyl MP Liquid Cylinder model with a 230 psi
relief valve operates between the pressure building setting
(125 psig) and the economizer setting (140 psig). When the
operating pressure is above the economizer setting (140
psi) the regulator will open (Figure 12). The gas that is
being supplied to the application will be pulled out of the
vapor space in the top of the tank. It will travel through the
regulator and then the vaporizer coils. It will be warmed
before it reaches the final line regulator. The action of
removing gas from the tank reduces the tank's pressure.
Figure 12
When the operating pressure is reduced to the economizer
setting (140 psi), the regulator will close (Figure 13). Gas
is still required by the application and will pull liquid up
the dip tube and into the vaporizer. This will turn the liquid
into gas and warm it before it is delivered to the final line
regulator. The pressure decay will be much slower since a
small amount of liquid can be vaporized into a large amount
of gas
Figure 13