Pumps & Systems, August 2008 Polyurethane coating technology is commonly chosen for demanding exterior applications such as bridges, stadiums and other large structures. When maintenance was...
Pumps & Systems, November 2007This past summer I received a suggestion from a Pumps & Systems reader to discuss siphons and their effect on pump head and pipeline flow. If you are like me,...
Pumps & Systems, December 2007 Industrial processes that manufacture, transfer, and distribute a variety of liquefied natural gases, from propane to oxygen to ammonia, require components to...
Design of Trench-Type Wet Wells for Pumping Stations
Pumps & Systems, May 2008In trench-type wet wells, the pump intakes are placed near the bottom of a deep, narrow trench coaxial with the inlet pipe but considerably below it (see Figure 1). The...
Assessing Pump System Performance
Determining which pumps and their associated systems to assess is the first step in the process.First of Two PartsWhat Is a Pump Assessment?A pump assessment is a mini performance test of the pump...
11-Year-Old Source of Forced Outages Found
Main oil pump hydraulic geometry was the root cause of numerous false turbine/generator overspeed trips.Troubleshooting rotating equipment failures and improving reliability is a process of...
Variable Speed Pump Operation Cuts Energy Costs; System Static Head Reduces Savings
Determining pump speed using the affinity rules can be a challenge.The days of inexpensive electricity are gone. With environmental pressures on the oil, coal and nuclear industries, electricity...
AC Motors Part 5: AC Motor Life
One of the major impacts on motor life is common sense—or maybe the lack thereof!It always amazes me how many open drip proof (ODP) motors are used in agricultural irrigation applications where...
Reducing the causes of friction and choosing the proper pump will increase efficiency and cost-savings.Imagine a major-league pitcher standing on the mound. He looks for the signal, nods in agreement,...
A mature community with an aging infrastructure, Beaver Falls, Pa., has faced many challenges. Home to one of the oldest and largest wastewater treatment facilities in Beaver County, the city has been...
With production time and cash flow at an all time premium, more companies are looking for time and cost saving alternatives to replacing slightly damaged assets.In a refinery, for example, it is...
Pumps and Systems, February 2007 Have you ever wondered why the pressure exerted by a column of liquid has absolutely nothing to do with its volume or, for that matter, the geometric shape of its...
Click Here for Pump Challenge #5 We will start with the basic formulas to calculate the velocity through the pipe of a given inside diameter D, and flow, Q. Proper coefficients are provided to...
Pumps & Systems, August 2007 How many gallons per minute are REALLY flowing out of that pump? Perhaps the OEM pump manufacturer tested this pump at the factory - or perhaps not. You now have a...
Pumps & Systems, November 2007 New heat activated epoxy-based materials are now being used to repair leaking and corroded pipe work when operations are unable to shut down. One key component in...