Fluid Supply; Fluid Requirements - Graco ProMix PD2K Installation Manual

Fluid Supply

Fluid Requirements

• To reduce the 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 available to operate air spray (300 psi) or
air-assisted (1500 psi) systems with a capacity of up
to 800 cc/minute (depending on material viscosity).
• Fluid supply pressure tanks, feed pumps, or
circulating systems can be used to supply fluid to
the system.
332457H
• Materials can be transferred from their original
containers or from a central paint recirculating line.
• Install a 100 mesh (minimum) fluid filter in the fluid
supply line, with a drain valve.
NOTE: The fluid supply must be free of pressure
spikes, which are commonly caused by pump stroke
changeover. Read the supply pressure on the gauge
(P). 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, it is
recommended the supply pressure be maintained
between 1/2 to 2/3 of the system operating spray
pressure.
• For high pressure systems, ± 300 psi (2.1 MPa,
21 bar) of setpoint.
If necessary, install pressure regulators or a surge
tank on the pump fluid inlet lines to reduce pulsation.
Contact your Graco distributor for additional
information.
Fluid Supply
31