Graco HydroShield WABH00, Инструкция - Каталог запасных частей

Страница: 4 / 142

Isolation System Overview
Isolation Isolation Isolation System System System Overview Overview Overview
How How
How the
the
the Isolation
Isolation
Isolation System
System
System Works
Works
Works
When using a HydroShield Air-Assisted Batch
Waterborne Isolation System, the fluid supply
remains grounded. The fluid supply can be any
low pressure pump or circulation system. The low
pressure fluid supply first fills an internal low pressure
pump reservoir, that then feeds into an isolated
Merkur AA fluid pump to send high pressure fluid to
the gun. After the isolation system has filled with
paint, the isolation valve separates and raises. This
allows the fluid inside the isolation system to become
electrostatically charged when the gun is triggered.
The charged fluid is attracted to the grounded
workpiece, wrapping around and evenly coating all
surfaces. When the gun trigger is released, the
isolation pump automatically refills.
Spraying Spraying
Spraying Waterborne
Waterborne
Waterborne Fluids
Fluids
Fluids
Electrostatically Electrostatically
Electrostatically
This isolation system and electrostatic air-assisted
gun are designed to spray only
only
only waterborne fluids
which meet at least one of the following flammability
requirements:
• Material does not sustain burning in accordance
with the Standard Test Method for Sustained
Burning of Liquid Mixtures, ASTM D4206.
• CE-EN CE-EN CE-EN 50348 50348 50348 Compliant: Compliant: Compliant:
Material is classified as non-ignitable as defined by
EN 50059: 2018.
See Ignitability of Coating Materials, page 137 .
When an electrostatic gun is connected to a voltage
isolation system, all of the fluid in the spray gun,
fluid hose, and isolated fluid supply is charged to
high voltage, which means that the system has
more electrical energy than a solvent-based system.
Therefore, only non-flammable fluids (as defined
above and in
Models, page 5 ) can be sprayed with
the system or be used to clean, flush, or purge the
system.
Precautions must be taken when using electrostatic
waterborne equipment to avoid potential shock
hazards. When the spray gun charges the isolated
fluid to high voltage, it is similar to charging a
capacitor or a battery. The system will store some of
the energy while spraying and retain some of that
energy after the spray gun is shut off. Because it
takes some time for that stored energy to discharge,
it is important to read the instructions, including the
Fluid Voltage Discharge and Grounding Procedure,
page 29
, and Grounding, page 16 , to understand
when you can approach or touch the gun nozzle.
The amount of time it takes to discharge the
energy depends on the system design. Follow the
Fluid Voltage Discharge and Grounding Procedure,
page 29
, before approaching the front of the gun.
4 3A8492A