Fairchild 10BP Manual

FAIRCHILD MODEL 10BP
BACK PRESSURE REGULATOR
Installation, Operation and Maintenance Instructions
You can mount the Model 10BP regulator in any
position without affecting its operation.
Clean all pipelines to remove dirt and scale before
installation.
Apply a minimum amount of pipe compound to the
male threads of the fitting only. Do Not use teflon
tape as a sealant. Start with the third thread back
and work away from the end of the fitting to avoid
contaminating the regulator. Install the regulator in
the air line.
The Inlet and Outlet ports are labeled “In” and “Out”.
Tighten all connections securely. Avoid undersized
fittings that limit the flow through the regulator. For
more information, see Figure 1.
NOTES:
The Model 10BP regulator ships from the factory set
at approximately midrange. When you install the
regulator, use the KnobAssembly to set the required
relief pressure, approximately. Full range setting
requiresabout13to16turnsdependingontherange
of the unit. Turn the Knob Assembly slowly in a
clockwise direction to increase the setpoint or back
pressure. Turn the knob in a counterclockwise
direction to decrease the setting. For more informa-
tion, see Figure 1.
Oil free air must be applied to the regulator.
Useafiltertoremovedirtandentrainedliquid
in the air line ahead of the regulator. If an air
line lubricator is used, it MUST be located
downstream of the regulator to avoid inter-
ferencewithperformance.
OPERATION
INSTALLATION
Figure 1. Model 10BP Outline Dimensions

IS-100010BP
Litho in USA
03/2007
To clean the Model 10BP,
use the following steps:
1. Shut off system pressure to the
regulator to prevent air from escaping. It
is not necessary to remove the regulator
from the air line.
2. Turn the KnobAssembly counterclock-
wise to relieve the compression on the
Range Spring.
3. Remove the six Screws from the Bonnet
Assembly. For more information, see
Figure 2.
4. Remove the Bonnet, Spring and
Diaphragm Assembly. For more
information, see Figure 2.
5. Wash the Diaphragm Assembly with a
solvent. Exercise care to prevent dam
age to diaphragms and valve facings.
Avoid solvents such as acetone,
carbon tetrachloride and
trichlorethylene.
6. Carefully reassemble the unit. Ensure
that the Vent in the Bonnet is clear. For
more information, see Figure 2.
MAINTENANCE
Figure 2. Model 10BP Exploded Drawing
If the standard maintenance procedure does
not correct the problem, install the appro-
priate service kit.
Service Kit Range
• 12127-1 2-150 psig
• 12127-2 300 psig
• 15743 400 psig
NOTE:
Troubleshooting
Source
Problem Solution
Difficult
to
adjust
Leakage Tighten the screws.
• Adjust the screw
and ball.
• Check the
lubrication.
• Adjusting Screw
and Ball
• Seal ring
lubrication
• Body Screws
• Diaphragm