Preventive Maintenance for Positive Displacement Pumps

Optimal PM frequency for positive displacement pumps balances the cost of maintenance against the cost and probability of failure. OEM recommendations provide the starting point, then failure history data and condition monitoring results are used to adjust intervals. Over-maintaining equipment wastes resources, while under-maintaining it increases failure risk.

Preventive maintenance for positive displacement pumps performs tasks on a fixed time or usage schedule regardless of current condition, while predictive maintenance uses condition data to determine when maintenance is actually needed. The most effective programs combine both approaches, using PM for tasks like lubrication and filter changes while applying PdM technologies to defer or trigger major component overhauls based on actual condition.

Wear-curve-based for items with known PF intervals, depending on which failure mode is developing. Early-stage signatures on Positive Displacement Pumps appear well before functional failure: flow degradation, packing weep, pressure pulsation. Catching the fault early means scheduling the repair into a planned outage — usually 6 to 16 hours of planned downtime instead of 24 to 72 hours of unplanned downtime when the asset fails on shift.

Critically. A pre-commissioning baseline captured under controlled conditions becomes the reference for every subsequent Preventive Maintenance reading. Without that baseline you're measuring against generic ISO thresholds, which can be wrong by 50 percent for a specific asset. Cost of capturing baseline at commissioning is minimal — a single route visit before the asset goes into production service. The data pays back across the next 15 to 25 years of operation.