GRAPHALLOY^®
Bushings That Solve CO2/Low Lubricity Fluid Problems

Self-lubricating GRAPHALLOY®, a graphite/metal alloy, eliminates concern about bushing or wear part failures or possible flashing of CO2.

The ability to operate without additional lubrication is important in CO2 pump applications because CO2 has low lubricity. Standard metal wear parts rely on the lubricity of the liquid being pumped for proper operation so they are prone to failures in pumps for CO2. In addition, due to high suction pressure required to keep CO2 as a dense phase liquid, flashing is always a possibility.

GRAPHALLOY bushings and wear parts are used in vertical and horizontal pumps for CO2 and light hydrocarbon service to help eliminate operational problems due to the poor lubricity of these liquids. The non-galling, self-lubricating features of the GRAPHALLOY bushing material allows pumps to continue working even when experiencing run-dry, flashing or cavitation.

Low lubricity fluids can be especially difficult for metallic bearings because the hydrodynamic film provided by these fluids is unable to provide enough lubrication, which can lead to metal-on-metal contact, galling or seizing of the pump.

Using GRAPHALLOY bearings and wear rings allows tighter clearances, improving reliability, lowering vibration and increasing efficiency in vertical and horizontal pumps.

Read about Graphalloy's Success in an application that experienced frequent dry running