The GRACO 115122 is a pressure relief valve designed to vent excess pressure to atmosphere, constructed primarily from carbon steel. It is intended for use in automatic lubrication systems to protect equipment from overpressure and to indicate blocked lubrication lines, allowing continued lubrication to other points while pinpointing blockages.

Key Features:

• Relief Valve
• 1/8” NPT male
• Carbon Steel (wetted parts)
• Maximum working pressure: 4,000 psi (276 bar, 28 MPa)
• Works with MSP, MX, MXP, MJ, and MHH divider valves; compatible with grease grades N.L.G.I. #1 or lighter
• No reset required after blockage is cleared
• Easy identification of blocked lines, high system pressure, or blocked bearings
• Allows lubrication system to continue supplying grease to non-blocked points
• Reliable performance in harsh environments

Applications:
In-plant machinery, off-road equipment, and other industrial applications requiring automatic lubrication and pressure relief

Installation Notes:

• Ensures proper fit, performance, and safety within GRACO lubrication systems
• Install using 1/8” NPT male threaded connection
• Ensure compatibility with system pressure and grease type
• Regularly inspect for signs of wear or blockage
• Follow manufacturer’s guidelines for maintenance and replacement