Type ACE97
7
must agree with the system that you are Padding
(blanketing) or Depadding (recovering). The serial
number will be needed in any communication with
your local Sales Ofce.
3. Clean the gas padding (blanketing) supply lines of
all dirt and foreign material before connecting
them to the Type ACE97 Pad-Depad valve.
4. The valve should be mounted above the tank
with the actuator case in a horizontal position.
Four connections are required (see Figure 5):
a. Blanketing gas supply to the valve
b. Vapor recovery/process connection (vent)
c. System tank connection
d. Sensing line to the tank
Piping Considerations
Piping must be capable of supporting the weight of
the system. Use pipe supports when necessary.
Refer to Figure 5.
Inlet Piping
The padding (blanketing) gas supply line should be
equipped with a Number 100 mesh strainer to remove
dirt and pipe scale. Inlet piping must be sized to
adequately deliver padding (blanketing) gas at the
specied inlet pressure under full ow conditions.
CAUTION
Undersized piping may inadequately
deliver Padding (blanketing) gas at
the specied inlet pressure under full
ow conditions. This may result in
unacceptable performance under high
demand conditions.
Outlet Piping
Valve outlet is piped into the tank vapor space.
Outlet piping should be self-draining to the tank and
of equal or greater size than the Type ACE97 valve
tank connection. The valve should be situated
above and as close as possible to the tank vapor
space for best performance.
CAUTION
Unnecessarily long or restricted outlet
piping may result in poor setpoint control.
Sensing Line
The sensing line should be 1/2-inch / 13 mm tubing
or pipe, must slope toward the tank, and should not
contain low points (or traps) that could catch liquid.
The sensing line must enter the tank above the liquid
level at a point that senses the vapor space pressure
and is free from turbulence associated with tank
nozzles or vents.
Note
Best control is obtained when both
connections to the tank are separate.
If the tank has only one available
nozzle, contact Regulator Technologies
for alternate methods of installation.
A Single Array Manifold (S.A.M.) is
available for such situations.
Vent Connection
The vent connection must be self-draining, facing
away from the valve, and of equal or greater size than
the valve tank connection.
Tank Venting
The tank may require normal and emergency vents.
The Type ACE97 Pad-Depad valve does not perform
these functions, it only controls the vapor space
pressure under process conditions.
Diagnostic Gauges
An on/off diagnostic gauge is mounted on the depad
main valve at the inlet to the cylinder. The face on
the gauge is marked to indicate whether the main pad
valve is opened, closed, or throttled.
Shutoff Valves
Note
Safety considerations may dictate
shutoff valves between the tank and
Type ACE97 valve.
Inlet (isolation) valves are desirable for servicing the
Type ACE97 valve. If this valve was not ordered with
an inlet pressure gauge, it is advisable to install a
gauge between the inlet isolation (full-port) valve and
the padding (blanketing) valve.
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