Fluid Supply
Fluid Supply

Fluid Requirements

•Toreduceth
e risk of equipment
overpressurization and rupture which can
cause injury, including skin injection, do not
exceed the pressure rating of the lowest rated
system component. See the identification
label for the maximum working pressure of the
equipment.
• To reduce the risk of injury, including skin
injection, you must install a shutoff valve
between each fluid supply line and the mix
manifold. Use the valves to shut off fluid during
maintenance and service.
Models are availableto operate air spray (300 psi) or
air-assisted (1500 psi) systems with a capacity of up
to 800 cc/minute (depending on materialviscosity).
• Fluid supply pressure tanks, feed pumps, or
circulatingsystemscanbeusedtosupplyfluidto
the system.
• Materials can be transferredfrom their original
containers or froma central paint recirculating line.
• Install a 100 mesh (minimum) fluid filterin the fluid
supply line, with a drain valve.
• The supply line should be sized to avoidpressure
loss of greater than a few psi between the
circulation headerand the proportioner fluid inlet
port.
NOTE: The fluid supply must be free of pressure
spikes, which are commonlyc ausedby pump stroke
changeover. Read the supply pressure on the gauge
(P, see figure on next page). Supply capability for
each pump must be at least 2 timesthe maximum
operating flow rate. Supply pressure must be as
close as possible to the pressure setpoint:
• For low pressure systems, ± 100 psi (0.7 MPa, 7
bar) of setpoint.
NOTE: For low pressure systems, the pressure
should be maintained at 1/2 to 2/3of the system
operating pressure.
• For high pressure systems, ± 300 psi (2.1 MPa,
21 bar) of setpoint.
If necessary, install pressure regulators ora surge
tank on the pump fluid inletlines to reduce pulsation.
Contact your Graco distributor for additional
information.
332458B 21