Taylor-Wharton LP3 - Manual (Page 18)

Regulators
The two pressure building regulators may be adjusted without removal from the system. The following
procedure describes the process:
1.
Fill the container with liquid product.
2.
Open the pressure building valve and allow the container pressure to stabilize for about an hour.
Note the pressure.
3.
Adjust the screw on the top of the regulator to raise of lower the pressure to the desired point.
When decreasing the setting, the pressure building valve must be closed and the container vented
to a lower pressure. Repeat step two and observe the change.
For more accurate adjustment it is recommended that the pressure building regulators be removed from the
system. A regulator bench adjustment fixture should be used. The figure below shows a typical setup.
Pressure
Gauge
On/Off
Valve
Regulator to
be adjusted
Pressure
Gauge
Regulator
Dump Valve
High Pressure
Cylinder
Figure 10: Regulator bench adjustment fixture.
1.
Leak test joints between the high pressure cylinder regulator and the dump valve. Joints must be
leak free before proceeding.
2.
Close the on/off valve and the dump valve.
3.
Open the high pressure cylinder valve.
4.
Set the high pressure regulator above the desired set point for the pressure builder.
5.
Slowly open the on/off valve and observe the downstream pressure gauge.
6.
When the regulator under adjustment closes, the P.B. set point is indicated on the downstream
pressure gauge.
7.
Close the on/off valve and open the dump valve.
8.
To reset the regulator, loosen the lock nut on the adjusting screw. Raise the setpoint by turning
the adjusting screw clockwise; lower the setpoint by turning the screw counterclockwise. After
adjustment, repeat steps 5 and 6 to check the setting before reinstalling the regulator on the liquid
container.
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