Domestic Water Recirculation Codes: Here is What We Heard
In the 04-05-2021 Monday Morning Minutes, we asked for your opinion on the length of the domestic water recirculation line from source to fixture. Here …
Cooling Tower Spring Startup Tips
The weather is warming, and our attention turns away from heating and toward system air conditioning. To protect the cooling tower pumps, we offer a …
Hydronic Expansion Joints (Part 2): It’s All About the Guides
Expansion joints in hydronic systems are used when the natural flexibility of the pipe will not handle the calculated movement caused by thermal expansion. Those …
Hydronic Expansion Joints (Part 1)
I was recently asked twice in one week, “What is the difference between an expansion joint and a flexible connector in hydronic systems?” Piping flexible …
Steam Condensate Pipe Sizing: Steam and Steam Heat Exchanger Basics Part 6
Today’s HVAC and Process engineers may choose any number of pipe sizing programs for steam and condensate applications. Put in a load and a pressure …
Steam Pipe Sizing: Steam and Steam Heat Exchanger Basics Part 5
Steam pipe sizing is easy with today’s sizing programs. What is behind the programs? This question and others like it are answered in the R …
Piping in a Tankless Water Heater vs. Volume Water Heaters
Service water heaters may be tank-type heaters, volume water heaters, or tankless heaters. How is the piping in a tankless water heater different from the more traditional …
Triple Duty® valves on your variable speed hydronic pumps
Bell and Gossett triple duty valves have, for decades, provided a cost effective way to assure there is a non slam check, balance, and shutoff valve on the discharge of your hydronic pump installation. These valves are used to throttle excess head and, therefore, should not be oversized. B&G offers these installation friendly valves in traditional full port model (3DS-S) and in a reduced port version (3DS-B) [Read more…]
Strategies for Water Use Efficiency – Cooling Towers – Part II
In this issue, we will discuss blow down and cycles of concentration. In addition to water emissions caused by evaporation and drift, cooling towers require blow-down to control the levels of dissolved minerals re-circulated in the cooling tower. These losses are offset or balanced by make up water to both maintain the level of water in the tower and more importantly, [Read more…]
A Great Way to Fill the Piping Systems – Cooling Tower Pumps and Piping – Part 9
The Xylem Bell and Gossett manual TEH-1209 has a great detail for filling the tower water system piping. Many times the cooling tower pump is used to take water from the tower pan and fill the condenser and piping system. This can lead to pump problems due to the large flow rate of the pump compared with [Read more…]