GRACO Pressure Relief Valve 4000 PSI (133991) - (SKU: 133991) Replace fittings if signs of

Replace fittings if signs of wear or leakage are present

Non-GRACO parts may void the warranty and compromise equipment reliability

Used in lubrication systems requiring precise spray control

particularly in industrial and maintenance applications where reliable

Keep threads clean and free of debris

GRACO Pressure Relief Valve 4000 PSI (133991) - (SKU: 133991) Replace fittings if signs ofThe 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