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Installation
NOTICE
If an isolation valve is installed downstream of the BRP
in the circulation line, the maximum circulation pump
pressure is not to exceed 600 psig (4.1 MPa, 41 bar).
Pressure greater than 600 psi might damage the BPR.
NOTICE
Handle the back pressure regulator with care to avoid
damaging the diaphragm.
Install the back pressure regulator (BPR) (A) in the
circulation system fluid return line (B). (See F
more than one spray station is used, install the BPR in
the fluid supply line after the last station. This helps
maintain proper circulating pressures in the system.
Fluid Flow
G
F
H
F
. 1. Typical Installation
IG
Key:
A
Air Operated Type Back Pressure Regulator
B
Fluid Return Line
C
Back Pressure Regulator Air Supply Line (not required for
mechanical (spring) type BPR)
3A7527B
. 1.) If
IG
E
E
E
1. Connect the fluid return line to the inlet and outlet.
Make sure the flow direction matches the fluid flow
arrow markings on the regulator body.
2. Install the fluid pressure gauge (17) in one of the
fluid pressure gauge ports on the fluid housing. For
an air operated type BPR, see page 9. For a
mechanical (spring) operated type BPR, see page
11. Use thread sealant.
When installing the gauge, use very little thread seal-
ant on the male threads to avoid plugging the gauge.
3. Install the plug (16) in the other port on the fluid
housing. Use thread sealant.
4. Air operated type BPR: Connect supply line (C) to
the air inlet of the BPR. The port on top of the air
section is 1/8 NPT. Convert port to 1/4 NPT male
with supplied fitting, if desired.
E
G
F
H
D
Air Regulator or BPR Controller
E
Fluid Supply Line
F
Fluid Pressure Regulator
G
Air Spray Gun
H
Gun Air Supply Line
Installation
NOTICE
D
C
A
Fluid Flow
B
8719c
5
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