Featured Featured Stories

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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What is a float block? »

Volume 2/ Issue 2 / February 2015 A float block secures the float and operating mechanism to prevent damage during shipping. It’s installed at the factory, in one of the equalizing tappings and needs to be removed when you install the control. Controls installed by boiler manufacturers also have a float block. It’s located in

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Help! I can’t take apart my Watchman pump. »

Volume 2 / Issue 2 / February 2015 You’re ready to disassemble the Watchman pump and motor for servicing when you notice that the instructions say to loosen the fasteners—but the parts list refers to capscrews. Now what? First, note that we use “fastener” to cover all the possibilities. Current assemblies use capscrews, but versions

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Making New Boilers Work with Old Systems »

Volume 2 / Issue 1 / January 2015 There’s an art to replacing an old steam boiler with a new, low-water-content boiler. You must manage the intricacies of connecting a boiler that holds less water, has a smaller steam separating chamber and makes steam more violently with pipes and radiators that may be 70 to

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