• Blog
  • Locate a Wholesaler
  • Careers
  • Contact
Image
  • Products
    • Overview
    • Pumps and Accessories
    • Boilers and Water Heaters
    • Hydronic Systems
    • Plumbing Systems
    • Steam and Condensate
    • Variable Frequency Drives (VFDs)
    • Glycol Installation
    • Snowmelt Designs
  • System Design
    • Overview
    • Project Gallery
    • Selection and Design Tools
  • Contractors
  • Service & Parts
    • Overview
    • Startup and Warranty
    • Parts
    • Service and Maintenance
  • Education
    • Overview
    • Training Opportunities
    • Factory Classes
  • About RLD
    • Overview
    • Team Deppmann
    • R.L. Deppmann Locations
    • Careers
    • Community Engagement
    • Press and News

Centrifugal Pumps: Determining Flow Rate Using Amp Readings

Norm Hall January 23, 2023 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Motors, Pumps, Pumps

We understand that the best way to determine the flow rate of an operating pump is the proper readout of gauges attached to the pump …

Read More
amp readingscentrifugal pumpsflow ratePumps
Happy New Year from R.L. Deppmann
Happy New Year from R.L. Deppmann

Net Positive Suction Head (NPSH) Part 5 of 5 – Good Cooling Tower Pump Piping Practice

Norm Hall January 4, 2021 Commissioning and Balance, Cooling Towers, Monday Morning Minutes, NPSH, NPSH, Pumps, Pumps, Pumps

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 …

Read More

Net Positive Suction Head (NPSH) Part 4 of 5 – Gauge Readings

Norm Hall December 28, 2020 Commissioning and Balance, Cooling Towers, Monday Morning Minutes, NPSH, NPSH, Pumps, Pumps, Pumps

The cooling tower pump calculations are completed, the project is bid, the Bell & Gossett pumps scheduled are awarded and installed. There is a noise …

Read More

Net Positive Suction Head (NPSH) Part 3 of 5 –NPSH Available

Norm Hall December 21, 2020 Commissioning and Balance, Cooling Towers, Monday Morning Minutes, NPSH, NPSH, Pumps, Pumps, Pumps

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 …

Read More

Net Positive Suction Head (NPSH) Part 2 of 5 –Safety Factors

Norm Hall December 14, 2020 Commissioning and Balance, Cooling Towers, Monday Morning Minutes, NPSH, NPSH, Pumps, Pumps, Pumps

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, …

Read More

Net Positive Suction Head (NPSH) Part 1 of 5 – Terms and Definitions

Norm Hall December 7, 2020 Commissioning and Balance, Cooling Towers, Monday Morning Minutes, NPSH, NPSH, Pumps, Pumps, Pumps

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 …

Read More
hydronic pump
hydronic pump

Create a New Variable Speed Pump Control Curve after Hydronic Balancing

Norm Hall June 29, 2020 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Pumps, Pumps, Variable Speed

This week, the R. L. Deppmann Monday Morning Minutes will explain how to show multiple speeds on a pump curve and how to determine what …

Read More
hydronic pump
hydronic pump

Hydronic Pump Balance using the Variable Speed Drive (VFD) with No Balance Valve on Pump

Norm Hall June 22, 2020 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Pumps, Pumps, Variable Speed

When there is no hydronic pump discharge balance valve, the variable frequency drive (VFD) is an important part of the balance procedure. How does the …

Read More

Hydronic Pump Balance using the Variable Speed Drive (VFD) with Assistance from a Triple Duty Valve

Norm Hall June 15, 2020 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Pumps, Pumps, Variable Speed

Most centrifugal pumps in heating and cooling systems have some oversizing in the head calculation. Once the HVAC hydronic system is proportionally balanced per ASHRAE …

Read More
tower system
tower system

Open Cooling Tower System Pumps – Balancing the Pump Using a Drive

Norm Hall June 8, 2020 Commissioning and Balance, Commissioning and Balance, Monday Morning Minutes, Pumps, Pumps, Variable Speed

Open cooling tower pumps are traditionally operated as constant speed. When balanced, the extra pump head or over-heading is throttled across the discharge balance valve …

Read More
  • Page 1 of 3
  • 1
  • 2
  • 3
  • →

About Us

Providing quality products and outstanding service to customers in Northern Ohio & Michigan since 1927.
ImageImage

Call Us: 800.589.6120

Navigation

  • Products
  • System Design
  • Contractors
  • Service & Parts
  • Education
  • About RLD
  • Careers

Connect

Connect with us on LinkedIn
Subscribe on YouTube
Cleveland | Detroit | Grand Rapids | Saginaw
Copyright ©2017 R.L. Deppmann. All Rights Reserved
  • Products
    • Overview
    • Pumps and Accessories
    • Boilers and Water Heaters
    • Hydronic Systems
    • Plumbing Systems
    • Steam and Condensate
    • Variable Frequency Drives (VFDs)
    • Glycol Installation
    • Snowmelt Designs
  • System Design
    • Overview
    • Project Gallery
    • Selection and Design Tools
  • Contractors
  • Service & Parts
    • Overview
    • Startup and Warranty
    • Parts
    • Service and Maintenance
  • Education
    • Overview
    • Training Opportunities
    • Factory Classes
  • About RLD
    • Overview
    • Team Deppmann
    • R.L. Deppmann Locations
    • Careers
    • Community Engagement
    • Press and News