Back in the early seventies, when I was in grad school, our government pledged to convert the U.S. measurement system to the metric system. A popular cartoon at the time showed a lab technician with a...
Pumps & Systems, October 2007Back in the early seventies, when I was in grad school, our government pledged to convert the U.S. measurement system to the metric system. A popular cartoon at the...
Pumps & Systems, October 2007The requirement for pH adjustment or neutralization is a common demand that spans various industries, including manufacturing facilities, research laboratories, food...
Pumps & Systems, October 2007A technology was introduced late last year to continuously monitor vibration levels of AC induction motor-pump machine trains along with automated analysis of each...
Two imperatives for many of today's industrial plants are to reduce the cost of operations through the enhancement of rotating equipment reliability and enhanced energy efficiency of pumping systems....
Q. Is it true that centrifugal pumps should be built with ball bearings that have greater than normal internal clearance?A. It depends on the pump type and the conditions of service for the...
Pumps & Systems, October 2007Hundreds of millions of dollars are spent every year repairing and replacing pumps well before they have reached their design life. The meantime between failures...
With highly reliable electrical systems, protective relays may be called upon to operate very infrequently. However, the effects of faults and abnormal conditions can be severe and protective relay...
Pumps & Systems, October 2007With highly reliable electrical systems, protective relays may be called upon to operate very infrequently. However, the effects of faults and abnormal conditions can...
Pumps & Systems, October 2007 The service department of a variable frequency drives manufacturer frequently sees the following scenario: A frustrated user calls with what he perceives to be a...
Pumps & Systems, October 2007 Frequency Hopping Spread Spectrum (FHSS) radio was invented during World War II by the military for communicating information and strategic plans to allied forces in...
Pumps & Systems, October 2007In my August column ("Tricks to Taking Flow Measurements in the Field"), I compared the pros and cons of one of several techniques that can be used to estimate pump...