GRACO Double Ball Check Valve - 1/4 in OD Pipe Inlet (F) x 1/4 in NPT (M), Brass - (SKU: 563059)The GRACO 563059 is a double ball check valve made of brass, designed to ensure one way flow in lubrication systems. It is used to prevent backflow and maintain system pressure. Key Features: Check Valve 1 4 in OD Pipe Inlet (F) x 1 4 in NPT (M) Brass body and balls 3000 psi maximum working pressure, 20 60 psi nominal cracking pressure Oil and grease systems Reliable one way flow Durable brass construction Easy maintenance Applications: Lubrication

high-pressure grease lubrication or bulk fluid transfer

wide spray pattern for efficient surface coverage in painting and coating applications

Ensure proper cleaning and maintenance to prolong the life of the hopper

Follow manufacturer guidelines for maintenance and thermal relief operation

and gel-coats in industrial and manufacturing environments

Its intended use is within fluid dispensing equipment and industrial machinery where pivoting joints are necessary for enhanced functionality and adaptability

It contains UHMWPE (Ultra High Molecular Weight Polyethylene) and leather throat packings

Ensure proper fitting selection and secure attachment to prevent leaks

Ensure the pump is depressurized and isolated before replacing the seal valve plate

Tighten securely to prevent leaks or dislodgement

Follow GRACO’s recommended procedures for hose installation and maintenance

easy-to-clean operation in environments requiring strict hygiene standards