The GRACO 133991 is a pressure relief valve designed for use in high-pressure lubrication systems. It is engineered to protect equipment by releasing excess pressure at a set point of 4000 PSI (275.8 bar), ensuring safe operation and preventing damage to system components. The material is not specified in available documentation, but it is intended for use with grease and compatible with various GRACO lubrication equipment.

Key Features:

• Pressure Relief Valve
• 133991
• 4000 PSI (275.8 bar)
• GRACO lubrication equipment, grease systems
• Reliable pressure relief at 4000 PSI
• Designed for use in automatic lubrication systems
• Available as a single valve or in kits (e.g., kit includes five valves)
• Helps prevent equipment damage due to overpressure

Applications:
Used in automatic lubrication systems for in-plant machinery and off-road equipment to protect against overpressure and ensure continuous lubrication to critical points.

Installation Notes:

• Using genuine GRACO parts ensures compatibility, reliability, and optimal performance of the lubrication system.
• Install according to GRACO equipment manual instructions
• Ensure proper thread and pressure rating compatibility with the system
• Regularly inspect for leaks or signs of wear
• Replace as part of routine maintenance or if pressure relief function is compromised