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 …
Net Positive Suction Head (NPSH) Part 4 of 5 – Gauge Readings
The cooling tower pump calculations are completed, the project is bid, the Bell & Gossett pumps scheduled are awarded and installed. There is a noise …
Net Positive Suction Head (NPSH) Part 3 of 5 –NPSH Available
The available cooling tower pump NPSH or net positive suction head is a function of the pan elevation, friction, and temperature. Sometimes the combination of …
Net Positive Suction Head (NPSH) Part 2 of 5 –Safety Factors
The Hydraulic Institute (HI) is a global authority on pumps and pumping systems. Think of them as the ASHRAE of pump design and testing. HI, …
Net Positive Suction Head (NPSH) Part 1 of 5 – Terms and Definitions
One of the most misunderstood concepts in pump selection for hydronic design is the net positive suction head or NPSH. Problems with NPSH can spell …