GRACO Piston Injector, PD, Single Point, 3900 Series, M14x1.5 - (SKU: 121668)The GRACO 121668 is a piston injector designed for use in lubrication systems, specifically as a single point injector within the 3900 series. It is engineered for heavy duty performance and is typically constructed from robust materials such as aluminum and steel to ensure durability and longevity. Its intended use is to deliver precise lubrication to critical points in industrial equipment, minimizing downtime and wear. Key Features: Piston Injector

and chemical transfer applications where reliable sealing and durability are required

Ensure the pump is depressurized and isolated from the system before replacing the check ball kit

Ensure proper torque is applied as specified in the manual (e

and process applications where chemical resistance and reliability are required

Provides sealing and cushioning

corrosion-resistant closure for unused or serviceable openings in fluid handling systems

providing durability and reliable performance in demanding industrial environments

but product description specifies 0-125 psi/0-8

Regularly inspect and replace worn seals to extend diaphragm life

GRACO RTX 650 and other compatible GRACO equipment

Used in GRACO pump and fluid handling systems to seal pipe openings and maintain system integrity

supporting efficient fluid transfer in industrial and maintenance applications