Maintenance & Reliability
HP Reliability: Modern pumps have stiffer shafts
Some multistage centrifugal pumps are designed with relatively slender shafts and operate at speeds above the so-called rotor critical. When that is the case and as the pump comes up to operating spee..
Smart motor lubrication saves energy
Many decades of experience confirm the success of oil mist for rolling-element bearings in the operating speed and size ranges found in motors for process pumps. For the past 40 years, empirical data ..
Case 52: Problems with a blocked-in centrifugal pump
The potential for overheating is one of many concerns
HP Reliability: Electric motors and mechanical efficiency
Reliability-focused readers know quite a bit about oil mist and many use plantwide oil mist systems for their process pumps and electric motor drivers. In fact, some major grassroots olefins plants us..
Estimate water hammer loads in steam piping
The problem is more complicated because of the two-phase flow
HP Reliability: Why continuing education gets dropped first
Fact: An oil refinery in the Western US achieves a pump mean-time-between-failure (MTBF) of over nine years. The facility has 1,200 pumps and, in a given year, repairs 130 of them. Fact: An oil refine..
Designing and troubleshooting stabilization plant filtration systems—Part 1
Compatability of the filter cartridge media with the plant feed is a major consideration
HP Reliability: Consider recessed-impeller pumps
Perhaps you have encountered pumping duties handling free-flowing slurries, sludge and fibrous materials. If used in these services, a standard centrifugal pump may clog, become vapor-bound or wear ex..
What's new in vertical enclosed shaft-driven sump pumps
Advanced designs incorporate axial-spiral design casing internals and fully recessed impellers
Proper gasket removal and replacement can reduce maintenance and increase uptime
Follow these guidelines for trouble-free performance
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