Why don’t my PTFE gaskets seal FRP, plastic and other light load flanges?
Featured Articles
State of the Industry 2012
Submersible pump industry survey provides a unique forecast.
Pump Curve Accuracy
Exploring the digitization methods of pump power and efficiency curves
The History of Pumps
The pump is one of civilization's earliest inventions. Considering its use in everyday life, it may be one of the most important.
Power Quality
The fundamentals of how power quality issues affect the plant, how to detect them and how to make them go away.
Latest Articles
In this multi-part series, we will investigate several aspects of centrifugal pump efficiency.
The McGraw-Hill scientific dictionary [5] states that a volute is "a spiral casing for a centrifugal pump... designed so that speed will be converted to pressure."
Specific speed is a concept developed for water turbines1 in 1915, which was later applied to centrifugal pumps (Stepanoff, 1948). Specific speed is a way to “normalize” the performance of these hydraulic machines.
It is said that old pump men never die—they just lose their prime—and I fear that is partially true. Therefore, before I lose my prime, I thought I'd share some equations with some of you younger pump-heads, which allow you to calculate the best efficiency point (BEP) capacity and head of a centrifugal pump, knowing only certain impeller and casing dimensions and the pump rotative speed.
Columns and Blogs
Tackling 4,000 years of pump technology and evolution in only eight pages of magazine space has been like trying to summarize War and Peace in one sentence.
Temperature changes can push pipe force beyond safe limits
The McGraw-Hill scientific dictionary [5] states that a volute is "a spiral casing for a centrifugal pump... designed so that speed will be converted to pressure."
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Unanticipated noise and vibration can be problematic for both occupants and processes within structures. Noise and vibration in piping systems can originate at pumps and other mechanical equipment. If the system design does not accommodate vibration, a variety of issues ranging from annoyances to actual business interruptions can occur.
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Pumps & Systems, February 2009
The operating costs of pumps, in relation to the service life, are considerably higher than the initial investment. Realizing savings on existing pumps means looking at operational efficiency and differential head. Mechanical retrofits are common in the market, but do we know enough about power retrofits to improve operations and save money on pumps?
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Pumps & Systems , July 2008
Fyrewerks is a fabricator of fire door core panels used in the building industry. By sandwiching the core between a veneer or routed wood exterior, the company provides a thin core panel to door manufacturers that meets the requirements for fire protection without losing architectural details of style. Since the panels are thin and easy to incorporate into door manufacturing, Fyrewerks blends form and function.
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When seal designs are applied to abrasive slurry applications that properly address the five design considerations noted above, mechanical seals can provide very reliable sealing performance.
