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Uponor Wins PPI Project of the Year for Pier 15 Exploratorium’s Radiant Heating and Cooling

On May 7, the Plastics Pipe Institute (PPI), a manufacturing-based trade association, announced the Pier 15 Exploratorium as their Project of the Year in the Building/Construction division.The award-winning project ...Read More

Lange, Johnson join WaterFurnace International, Inc. to lead utility market development

WaterFurnace International, Inc., the leading manufacturer of geothermal and water source heat pumps, announces the appointments of Will Lange as director of utility development for the company and Greg Johnson ...Read More

Bosch Experience Center at Serenbe Showcases Energy Efficient, Sustainable Home Solutions

Bosch Thermotechnology Corporation will open an educational and interactive demonstration center in partnership with Serenbe, a 1000-acre sustainable community development south of Atlanta, on the morning of May 31st. Visitors ...Read More

Article Categories / Resources / The Library / Older Steam Heating Systems

Hoffman Venting Valves for Every Purpose

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Published
July 27, 2009 Download PDF Subscribe to RSS feed

Thanks to Frank "Steamhead" Wilsey for finding and sharing this one with us. Here you'll find a discussion of Hoffman's Equalizing Loop, which came before their Differential Loop. Great stuff. Thanks, Steamhead!