Graco 121668 Piston Injector

Piston Injector – Graco Part 121668

Compatible Systems

• Graco automatic lubrication equipment
• Equipment whose Graco parts list calls for part number 121668

Graco part number 121668 is the Graco 121668 Piston Injector, an injector. An injector is a metering device in a lubrication system that delivers a measured amount of lubricant to a lube point on each cycle. Graco automatic lubrication equipment supplies grease or oil to metering devices, such as injectors or divider valves, that deliver a measured amount to each lube point.

About the Graco automatic lubrication equipment

Single-line parallel: a pump sends lubricant down one line to injectors, each injector meters a set amount per cycle and shows it cycled with a pin; line pressure is vented between cycles. Series progressive: a pump feeds a divider valve whose pistons move in sequence, so each outlet gets a measured amount; if flow stops the pistons stop and resume from the same point. Graco lists uses such as: in-plant machinery lubrication (LubePro, Lube Master, Manzel). Graco GL-series injectors are metering devices for single-line parallel automatic lubrication systems. In a series progressive system a divider valve passes lubricant to each outlet in sequence; if flow stops, the pistons stop and resume from the same point.

What the Terms in the Part Name Mean

• Injector: Metering device delivering a set grease amount to one point.

Before You Order

• Check the output size or number of outlets in the description against the lubrication point it serves.
• Have your equipment model, and the serial number if available, ready if you contact us for help.

Service Notes

• Follow the pressure relief and lock-out steps in your Graco manual before servicing any pump, valve, applicator or electrical part.

Frequently Asked Questions