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All Systems
NOTE: Reference numbers and letters in parentheses
in the text refer to the callouts in the figures and parts
drawings.
The Typical Installations shown in Figs. 5 and 6 are
only examples. Contact your Graco distributor for
system design assistance.
An accessory surge tank (B), Part No. 218509 (cst) or
238983 (sst) should be used to reduce fluid surging
and to prevent backflow into the pump. Install a full
flow, non-restrictive fluid shutoff valve (D) before and
after the surge tank to isolate it for servicing. The
surge tank also uses the accessory stand (218742).
WARNING
COMPONENT RUPTURE HAZARD
To reduce the risk of component rupture,
which can cause serious injury, be sure
that all accessories and system compo-
nents can withstand the pressure and flow in this
system.
Pressure Relief Valve
(for non-circulating systems)
KEY
A
Accessory Pump Stand (P/N 218742)
C
50 mm (2 in.) Diameter Pipe
D
Full Flow, Non-Restrictive Fluid Shutoff Valve
E
Fluid Supply Line
AA External Pressure Relief Valve
BB Fluid Return Line
CC Pump Fluid Inlet
DD Pump Fluid Outlet
Do not install a fluid shutoff valve in the fluid line
1
between the pump outlet (DD) and the pump inlet (CC).
See the WARNING above.
Fig. 4
8
309136
Installation
Mount the Pump
Mount the pump in the accessory pump stand (A), Part
No. 218742. Secure the stand to the floor with M19
(5/8 in.) bolts which engage at least 152 mm (6 in.) into
the concrete floor to prevent the pump from tipping.
Non-Circulating Systems
In non-circulating systems with a fluid outlet that can
be closed off (causing the pump to stall), install a fluid
pressure relief valve (AA) and a return line (BB). See
Fig. 4.
fluid outlet is closed off. Install the valve so the ar-
row on its body matches the direction of fluid flow.
Do not install a fluid shutoff valve in the fluid line
between the pump outlet (DD) and the pump inlet
(CC). Doing so defeats the purpose of the pressure
relief valve if the shutoff valve is closed, resulting in
pump overpressurization. Overpressurization can
cause the pump or components to rupture, result-
ing in serious injury and property damage.
BB
E
D
A
WARNING
COMPONENT RUPTURE HAZARD
The pressure relief valve reduces the
risk of the pump overpressurizing if the
piston seal is worn and leaking, and the
DD
C
AA
E
D
CC
1
01407
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