Table of Contents
Advertisement
Installation
The Typical Installation shown in Fig. 1 is only a guide to
design a system. For assistance in designing a system
to meet your needs, contact your Graco distributor.
Install the Back Pressure
Regulator
Do not use PTFE tape on pipe threads. Such use
could cause a loss of grounded continuity, which
could lead to a fire or explosion caused by static. Also,
if pieces of the tape break off, the function of the BPR
could be affected.
1. Install the back pressure regulator (BPR) (A) in the
Fluid Return Line (D) or circulation loop return line.
See F
. 1. Verify that the BPR is securely installed
IG
in a rigid piping system. If flexible fluid lines are
used, the two 1/4 - 20 tapped mounting holes on the
side of the regulator should be used to securely
mount the regulator.
2. The BPR (A) has one 3/8 inch inlet port and one 1/4
inch gauge port. (The gauge port can be used as an
optional inlet port for low flow applications.) The two
outlet ports are 3/8 inch npt.
Connect fluid lines to the inlet and outlet ports that
are convenient for your installation. Make sure the
fluid flow agrees with the IN and OUT markings on
the BPR housing.
3. Install an accessory gauge, if used, in the 1/4 inch
gauge port. Install plugs in the unused inlets and
outlets.
3A7681A
4. If more than one spray station is used, install the
BPR (A) in the Fluid Return Line (D) after the last
spray station to maintain proper system pressures.
5. Install an air line to the top fitting on the BPR (A) for
air piloted models. The Air Line (G) needs an Air
Regulator (H) and Air Filter (not shown) to allow for
the adjustment of the fluid pressure. The Air Filter is
required to remove harmful dirt and moisture from
the air supply. Install a Bleed Type Shut Off Valve (J)
upstream of the air regulator.
Grounding
The equipment must be grounded to reduce the risk
of static sparking. Static sparking can cause fumes to
ignite or explode. Install the BPR into piping that is
properly grounded. Grounding provides an escape
wire for the electric current.
Installation
5
Advertisement
Table of Contents
