We are gathering input from the last R. L. Deppmann Monday Morning Minutes asking for your feedback on the potential to “not follow the rules.” …
Hydronic Expansion Tanks: Can I Pump into the Point of No Pressure Change (PNPC) to Reduce the Tank Size? (Part 1 of 3)
We often design system after system and designate the sizing of expansion tanks to the newest employee on the team. It is just a matter …
Hydronic Expansion Tanks: Have I Ever Pumped into the Point of No Pressure Change?
There is a constant flow of hydronic system design questions coming into R. L. Deppmann Company. Sometimes the questions are about complicated hydronic, steam, or …
SCCR and Interrupting Capacity in Packaged HVAC and Pumping Equipment
Recently, we received several requests for the “short circuit current rating” or SCCR of a packaged piece of equipment. We also received requests for the …
Boiler Feed Unit: Pump Minimum Flow
Maintaining the required minimum flow in centrifugal pumps is key to trouble free expectations and long life. In boiler feed applications, this minimum flow is …
Boiler Feed Unit Pump Control is All About the Number of Pumps and Boilers
When selecting and specifying a steam boiler feed unit or deaerator, the engineer must pay attention to the controls. Level controls at the boilers must …
Vented Boiler Feed Units & Pressurized Deaerator Boiler Feed Units, What is the Difference?
Some systems have deaerator boiler feed systems, and some have vented boiler feed systems. What is the difference between them? When should I use one …
What is a Steam Boiler Feed Unit and How is the Receiver Sized?
Once again, our industry tends to be clear when something is named. Just reverse the two words. Boiler feed units simply “feed the boiler.” The …
What Is A Steam Condensate Return Unit And How Is It Sized?
We normally do not use steam for comfort heating when designing a system today. Other than old steam heating systems, we use steam for building …
Net Positive Suction Head (NPSH) Part 5 of 5 – Good Cooling Tower Pump Piping Practice
Happy New Year 2021! I pray that we all have a healthy year and see the return of normal lifestyles. This final blog in this …