The installation of hydronic and steam flow meters often involves a term simply stated as “minimum pipe diameters.” You may hear that a meter or …
Circuit Setter Balance Valve and Flow Meter Sizing and Turndown
We recently received an email from an engineer in Western Michigan concerning a low-flow, high-head pump process application and the proper balance valve specification. This …
Energy Savings Using Variable Speed Water Pumps on Constant Flow Condensers
When using multiple parallel condensers with constant speed pumps, the flow rate at part load may be excessive and problematic. Our last blog on this …
Multiple Condenser Cooling Tower Pumps – “Solutions for Excessive Flow”
The design and flow balance in systems with multiple parallel condensers is straight forward. We should expect no issues at full capacity. What happens when …
Balancing Constant Speed Cooling Tower Pumps with Multiple Condensers
It is important to check the single pump operation when balancing parallel pumps for multiple constant speed cooling tower pumps. The condensers and pumps are …
Selecting Constant Speed Cooling Tower Pumps & Balance Valves with Multiple Condensers
It is important to check the single pump operation when selecting parallel pumps for multiple constant speed cooling tower pumps. In the last R. L. …
Constant Flow Cooling Tower Pumps & Variable Frequency Drives (VFD)
The blistering hot weather here in southeast Michigan caused me to turn my attention to cooling tower pumps and their control. Cooling tower pump control …
HVAC Hydronic Pumps – Should I Trim the Impeller or Trim with Speed? (Part 2 of 2)
In the last R. L. Deppmann Monday Morning Minutes, I offered a couple of reasons why an engineer would schedule a larger impeller than needed …
HVAC Hydronic Pumps – Should I Trim the Impeller or Trim with Speed? (Part 1 of 2)
Engineers schedule a pump capacity in GPM and head along with the horsepower. The pump manufacturer traditionally trims the impeller from the maximum size, also …