13
Product Manual - Nomad 830G MP
First Fill/Purge Procedure
Note:
The Nomad tank is shipped with NF purity
nitrogen gas. Purging is necessary prior to
filling. During first fill, only fill the vessel
to 75% full to allow for liquid expansion
experienced with a new (warm) tank.
Each fill thereafter can be filled to 100%
full. All valves on an empty Nomad tank
should always be kept closed to prevent
the inner vessel and plumbing from being
contaminated.
Purging and First Fill Procedure
1
Attach the source of liquid purge to the fill connection
of the Nomad tank.
2
If the fill hose has not been kept under pressure since
the last delivery, it will need to be purged. Purge the
fill hose and connector through the purge valve, if so
equipped, or by loosening the fill connection until vapor
flows from the connection and then retighten. Use the
hose drain on the tank piping if equipped as such.
3
If the Nomad tank is pressurized, open the vent valve
and blow down to approximately 5 psi. To prevent
drawing atmospheric contaminants back into the tank
during the purging operation, a positive pressure of at
least 5 psig should be maintained in the tank.
4
Partially fill the Nomad tank with approximately 5000
standard cubic feet of product (use truck meter to verify
amount)
Let liquid build pressure close to safety setting
Leak check all plumbing circuits while the tank is under
maximum pressure
While vent gas is still warm and tank is under pressure,
move the four-way valve to the ‘Equalization’ position
and loosen the fittings on either side of the liquid level
gauge to allow the gauge lines to purge with gas. Check
the gas stream coming out of the fittings for evidence of
moisture. Continue to flow the gas until lines have been
purged and there is no visible signs of moisture. Tighten
fittings to stop the flow of gas. Move the four-way valve
to the ‘Normal Operation’ position.
Vent all product out of the liquid valve and close before
pressure drops below 5 psig.
5
Fill Nomad tank with 5000 standard cubic feet of
product. Primarily use the bottom fill on a FlexFill style
tank. Make sure some product is also routed through
the top fill lines to purge them prior to totally filling the
tank.
Open the PB circuit and set to maximum psi. Ensure
cold gas is flowing through this circuit as indicated
by frosting on the pipes. Let liquid in the tank build
pressure close to safety setting Once desired pressure
is reached, open liquid valve. When liquid is out of the
tank and pressure is still high, open the vent and gas use
valves. If a final line manifold is already connected to
the gas use valve, purge through the manifold to insure
that there is a flow through the gas use circuit and any
moisture is purged out before liquid is introduced into
this circuit.
Once pressure is blown down to 5 psig, close the liquid
vent and gas use valves
6. Fill the Nomad tank with 5000 standard cubic feet of
product and let the liquid in the tank build pressure
close to the safety setting. Insure the product is flowing
through and purging the economizer lines. Control the
pressure by opening the gas use and vent valves. Once
pressure is approximately 5 psig, close the gas use and
vent valves
7
Fill the Nomad tank with 5000 standard cubic feet of
product and let the liquid in the tank build pressure to
close to the safety setting. Once the desired psig has
been reached, open the gas use and vent valves. Once
pressure is approximately 5 psig, close the gas use and
vent valves
Note:
The purge gas should be cooling the tank.
If the tank vent line is HOT, always purge
until the vent line is cool or even frosted.
A new, warm tank should go through a
minimum of four or five purge cycles
before filling with liquid.
Filling the Tank After the Cool Down
Process is Complete
1
If equipped with a bottom fill valve, the bottom fill
valve and the tank vent valve are the valves to be used
to fill a warm tank.
2
Have the driver start the pump and slowly deliver the
liquid into the tank. Observe the tank pressure and
control the pressure by venting the tank down or by
using the top fill valve to control the pressure.
Filling Procedure
