Graco 3A0471B User Manual
Instructions
3A0471B
Pressure Switch
Bulletin 15521
Moisture-resistant single control pressure switches used to detect pressure changes.
Not approved for use in European explosive atmospheres.
Models:
Model No. Description
557828 Stainless steel piston and
Buna-N o-ring sensor
557829 Stainless steel piston and
Buna-N o-ring sensor
557830 Buna-N, diaphragm sen-
sor
Important Safety Instructions
Read all warnings and instructions in this manual.
Save these instructions.
Pressure Range
Adjustment
400 - 4700 psi
(2.75 MPa, 27.57 bar
- 32.4 MPa, 324 bar)
10 - 150 psi
(0.07 MPa, 0.69 bar -
1.03 MPa, 10 bar)
Factory Pressure
Preset Max Pressure
750 psi rising
(5.17 Mpa, 51.7 bar)
1150 psi rising
(7.93 MPa, 79.28 bar)
50 psi rising
(0.34 MPa, 3.44 bar)
4700 psi
(32.4 MPa, 324 bar)
1500 psi
(10.3 MPa, 103.4 bar)
ENG
Tools Needed:
• 1-1/16 inch open end wrench
• flat blade screwdriver
Warnings
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When
these symbols appear in the body of this manual, refer back to these Warnings. Product-specific hazard symbols and
warnings not covered in this section may appear throughout the body of this manual where applicable.
WARNING
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding, setup, or usage of the system can cause electric
shock.
• Turn off and disconnect power at main switch before disconnecting any cables and before servicing
equipment.
• Connect only to grounded power source.
• All electrical wiring must be done by a qualified electrician and comply with all local codes and
regulations.
SKIN INJECTION HAZARD
High-pressure fluid from dispense device, hose leaks, or ruptured components will pierce skin. This may
look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical treat-
ment.
• Do not point dispense device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow Pressure Relief Procedure in this manual, when you stop dispensing and before cleaning,
checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
Pressure Relief Procedure
Pressure Relief
Relieve pressure in system following procedure recom-
mended for your operating system or pump.
2 3A0471B
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