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Two pressure-reducing valves (PRVs) in series (Two-step pressure reduction) »

Volume 3/ Issue 1/ March 2016 Application Reduce a steady or varying high inlet pressure to a constant adjustable low delivery pressure. General Two pressure-reducing valves in series are generally used when the total reduction in pressure is greater than that attainable with one valve. Here’s the rule of thumb: Use a two-step reduction whenever

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Celebrating the Bell & Gossett 100th anniversary by the numbers »

Celebrating the Bell & Gossett 100th anniversary by the numbers As the Bell & Gossett brand marks a century of innovation in 2016, here are some notable dates and numbers in B&G history. 1916: The year W.C. Bell and E.J. Gossett formed the Bell & Gossett Co. in Chicago. 87: Number of years that Philadelphia-based

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Hydropneumatic Tanks for Variable-Speed Pressure Boosters, Part 2 »

Guest Post – BY Norman Hall, President,  R. L. Deppman – Bell & Gosset Representative Read the original post on the R.L.Deppmann web site In last week’s RLD Monday Morning Minute, I described a brief history of pressure-boosting systems and the introduction of the pre-pressurized tank. This week we continue with the sizing of these tanks

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Hydro-pneumatic Tanks for Variable Speed Pressure Boosters, Part 1 »

Guest Post – by Norman Hall, President R. L. Deppmann – stocking representative of Bell & Gossett read the original post on the R.L.Deppmann web site Possibly only engineers, like myself, can appreciate controversy in plumbing system design. The use and sizing of storage tanks in variable speed pressure boosters is a current topic at

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How to run a condensate zone off a steam boiler »

Volume 2/ Issue 5/ September 2015 1. Can I run a hot water zone off an existing steam boiler without a heat exchanger? Yes, but there is a limit to how much radiation your steam boiler can support. Manufacturers list two capacity outputs on every steam boiler: the Department of Energy (DOE) capacity, aka the

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Adding chemical treatment to boilers »

Volume 2/ Issue 5/ September 2015 An engineer planning to specify a Domestic 75CBM22-85 BFU recently asked us if it’s feasible to have a chemical feed pump come on at the same time as the make-up to the BFU. The chemicals wouldn’t be pumped into the receiver, but instead added to the make-up water. We

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Factory tested as complete pumping packages »

Volume 2/ Issue 4/ July 2015 These six words, in the specs for every Bell & Gossett Domestic® Pump Series, add up to one word: confidence. Our production team assembles each unit and conducts multiple performance tests, linking the results to the unit’s factory serial number file. Units ordered with control panels are tested through

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Do’s and don’ts for one-pipe steam systems »

Volume 2/ Issue 4/ July 2015 Over the years we’ve heard numerous questions on steam systems, from what causes water hammer to how to size traps to selecting boiler feed tanks and condensate pumps. We’ve compiled our answers in the following do’s and don’ts for a one-pipe steam system. 1. DON’T size a replacement boiler

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Ten reasons steam-heating boilers flood »

Volume 2/ Issue 3/ May 2015 Having problems with that steam-heating boiler’s water line? Is that boiler constantly flooding? And does that make your customer complain about not having enough heat? Before you get mad at the automatic water feeder, look at what may be causing the flooding. Good troubleshooters never make decisions until they’ve

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How to size a condensate return unit »

Volume 2/ Issue 3/ May 2015 Facilities with their own boiler plant almost always have a closed loop system and require condensate to be as hot as possible upon return to the boiler. Conversely, steam condensate return pumps require subcooling to prevent cavitation or condensate flashing to vapor at the pump impellers’ suction eye. The

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