GRACO 557829 – Moisture-Resistant Single Control Pressure Switch, 4700 PSI

GRACO 557829 – Moisture-Resistant Single Control Pressure Switch, 4700 PSI

Pressure switch assembly designed for all Modu-Flo reservoirs, providing reliable pressure monitoring and control for lubrication systems. Part of Trabon’s comprehensive line of reservoir accessories for automated lubrication applications.

Turns off your pump or controller and activates venting once the lube system reaches the desired pressure level.

Additional Specifications

GRACO Code: 641-210-120

Specifications

Adjustable	Adjustable
Application	On-Road Vehicles, Off-Road Equipment
Inlet Size (in)	0.25
Inlet Thread Type	NPT
Maximum Operating Pressure (psi)	4700
Model	Trabon
Power Connection Type	NEMA-4
Type	Pressure Switch

Features

Electronic pressure sensing capability

Automatic pump shut down and vent when pressure drops

Includes five foot cable with flying leads

Quick disconnect capability

Compatible with all Modu-Flo reservoirs

Reliable pressure monitoring

Applications

Injector-based lubrication systems

Automated pressure monitoring

System protection and shutdown

Automated lubrication systems

Industrial machinery lubrication

Modu-Flo reservoir systems

Compatible Equipment

G3 pumps

Injector-based systems

All Modu-Flo reservoirs

Trabon lubrication systems

All sizes of compatible GRACO pumps per this product line

Related Parts

124595 – M12 Male Connector (required for installation)

563325 – High Pressure Blowout for 5 pint or 5 lb reservoirs

563326 – High Pressure Blowout for 12 and 20 pint or 12 and 20 lb reservoirs

563327 – High Pressure Blowout for all rectangular reservoirs

563326 – High pressure blowout switch (5 PT/LB)

563326 – High pressure blowout switch (6, 12 and 20 PT/LB)

563179 – Standard blowout (1450 PSI)

Kit Contents

557829 – Electronic Pressure Switch with five foot cable and flying leads

Requires purchase of 124595 M12 Male Connector for proper installation. Switch triggers G3 pump shutdown and vent operation when injectors dispense and pressure drops. Old part number was 542-210-120. Listed as universal pressure switch for all reservoir types in the Modu-Flo system. Listed as P1 option in pressure indicator section. Part of a broader pressure control system with various blowout switches and pressure indicators available.

Reference Manuals

340574 (Page 8) G3 Electric Lubrication Pump

340706 (Page 6) G3 Selection guide

L12000EN – D (Page 8)

3A0471 (Page 1) Pressure Switch