The GRACO 563505 is a complete electric Lube Sentry Valve Switch assembly designed for use in automatic lubrication systems. It is constructed from steel and is intended to provide automatic warning and shutdown of compressors, pumps, and engines when oil is not flowing properly to primary dividers in series-type lubrication systems.

Key Features:

• Electric Lube Sentry Valve Switch, Complete
• Steel
• 4–400 pints per day (1.89–189.2 liters per day)
• Maximum pressure: 6,000 psi (414 bar)
• Compatible with oil lubricants (450–2,000 SUS)
• Microswitch assembly for electric shutdown
• Bolted-together components for easy maintenance
• No check valves to avoid trapping contamination
• Reliable operation in series-type lubrication systems
• Operating temperature: -20°F to 180°F (-29°C to 82°C)
• Electrical rating: 5 amps @ 125/250 VAC; A, B, or C @ 28 VDC (A: Inductive - 3 amp, B: Resistive - 5 amp, C: Max Inrush - 15 amp)

Applications:
Used in automatic lubrication systems for compressors, pumps, and engines to ensure proper oil flow and provide shutdown protection in case of flow failure. Suitable for industrial, mining, energy, agriculture, and transportation sectors.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance of the lubrication system.
• Install the Lube Sentry Valve in the main lube line downstream of the pump, filters, and controls, but ahead of the master divider valve.
• Ensure proper alignment and secure bolting of components.
• Regularly inspect seals (Viton) and connections for leaks or wear.
• Maintenance can be performed without shutting down the equipment being lubricated.
• Follow manufacturer’s installation and maintenance guidelines.
• Use only compatible lubricants as specified.
• Regularly check for proper operation and flow.