CHART 1000 - Page 18

14
Introduction/Operation Product Manual - Perma-Cyl
®
w/ FlexFill™ Piping Option
Pressure Build
The pressure build circuit for the 5500 Perma-Cyl model is
used to build pressure back in the vessel after a delivery or to
maintain pressure as liquid is withdrawn from the vessel. The
vessel pressure is set by adjusting the PB regulator (R-1).
Standard PB set points found in the 07 option kits are:
LP - 35-07 (MP version only)
MP - 125-07
HP - 300-07
VHP - 450-07
Photo 7 - External PB Vaporizer Option 07
As the tank pressure drops below the PB set point, the
regulator opens and allows liquid to ow out the bottom of
the tank, run through the PB regulator, vaporize in the PB
coil, then go back into the gas phase of the tank. The pressure
build circuit can be shut off by closing V-8 (see Photo 10).
The PB regulator can be serviced by also closing V-9.
Note: In a high ow scenario, the limiting factor
in ow is the regulator. A high ow kit
is offered that adds an additional PB
regulator in parallel with the existing one
(R-1) to allow for higher ows (see Photo
4).
Economizer
The economizer circuit allows for the customer to utilize
the natural heat leak that occurs in every cryogenic storage
vessel. The economizer circuit for the 5500 VHP model is
comprised of an economizer regulator (R-2) set at 15 psi
above the PB regulator. When the tank pressure reaches the
economizer regulator's set point, the economizer regulator
opens and allows gas to ow directly from the head space to
the gas use circuit. The economizer feature can be turned off
by closing V-5. The economizer regulator can be serviced by
closing V-5 and V-7.
Photo 8 - Economizer Plumbing Circuit
As long as both economizer valves are open, the economizer
feature will always work. This includes all gas use vaporizer
options. Even if the customer supplies their own vaporizer,
the economizer function is never lost. For the LP (35-07)
plumbing option, the economizer regulator is plumbed so it
vents to atmosphere. This is common for liquid applications.
Liquid Use - VHP
The liquid use circuit for the 5500 VHP model is different
than the other Perma-Cyl models. Liquid can be withdrawn
from the bottom of the tank through the PB circuit (C) from
C-2 (see Photo 10). For high ow gas applications, see the
Gas Use section on the next page.
Liquid Use - MP
The liquid use circuit for the 5500 MP model is the same
as the 5500 VHP model except it has an auxiliary liquid
withdrawal port. The tank can be ordered with a plugged
1/2" FPT connection or a 1/2" ACME VJ valve. The VJ
valve is available on either the left or right side of the tank.
Photo 9 - VJ Valve