Centralized Lubrication Systems: Selection and Maintenance

Centralized Lubrication Systems

Centralized lubrication systems deliver grease or oil from a central reservoir to multiple lubrication points through a network of pipes, metering valves, and fittings. They improve reliability by ensuring consistent, timely lubrication while reducing labor costs and safety risks associated with manual lubrication of hard-to-access points.

System Types

System Type How It Works Best For
Single-Line One supply line; metering valves dispense measured amounts at each point Small-to-medium systems, up to 100 points
Dual-Line Two supply lines alternating pressure; positive displacement at each point Large systems, up to 1000+ points, heavy industry
Progressive Grease flows through metering blocks in sequence; each block must dispense for flow to continue Medium systems, visual verification of each cycle
Multi-Line Individual pump element for each lubrication point Critical equipment, precise control

FAQ

Q: What grease specifications matter for centralized systems?

Critical properties include: (1) Pumpability — the grease must flow through pipes without excessive pressure drop. Softer NLGI grades (0, 1, or 00) are often needed. (2) Oil separation — minimal bleeding in the system. (3) Mechanical stability — must maintain consistency after passing through pumps and metering devices. (4) Low-temperature flow — must remain pumpable at the lowest ambient temperature.

Q: What causes centralized system blockages?

Common causes: (1) Grease hardening in pipes due to age or temperature, (2) Contamination (dirt, water, wear particles), (3) Incompatible grease mixing causing hardening, (4) Incorrect NLGI grade for the system, (5) Damaged or clogged metering valves, (6) Air pockets in the system.

Q: How often should centralized system grease be changed?

In continuous-operation systems, the grease in the reservoir should be consumed and replenished within the grease's shelf life. If a reservoir's contents last longer than the grease shelf life, either use a smaller reservoir or switch to a grease with longer shelf life. Never top up old grease with new — drain and clean the reservoir first.

KOEED Support

Contact Moritta@KOEED.COM for KLÜBER products suitable for centralized lubrication systems with your system specifications.

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