Metraflex LPD Y strainer
Metraflex LPD Y strainer

Parallel Pumping in Condenser Applications: Automatic Differential Pressure Control (Part 3)

RL DeppmannHydronic System Design, Selection and Specification, Cooling Towers, Piping and Pumps, Parallel Pumping, Parallel Pumping, Commissioning and Balance, Monday Morning Minutes, Cooling Towers, Pumps

Chilled water condensers are normally operated as constant-flow devices and the pumps serving them are constant-speed. Why would you ever use a variable-speed drive for …

Griswold Wafer
Griswold Wafer

Parallel Pumping in Condenser Applications: Limiting the Flow Rate (Part 2)

RL DeppmannPiping and Pumps, Parallel Pumping, Parallel Pumping, Monday Morning Minutes, Commissioning and Balance, Cooling Towers, Pumps, Hydronic System Design, Selection and Specification, Cooling Towers

In part 1 of this series we offered an example condenser water pumping system. The design of this example is 800 GPM per condenser for a …

Hydronic Pump Piping and Trim: Vibration Inertia Bases

RL DeppmannMonday Morning Minutes, Pumps, Vibration and Expansion Control, Expansion and Noise Control, Installation, Vibration Bases, Vibration Bases

Oftentimes an engineer will specify a pump mounted on springs, vibration base, inertia base, or isolation base. Our industry tends to use a number of terms for the same …

Hydronic System Centrifugal Pump Trim: Flexible Connectors

RL DeppmannExpansion and Noise Control, Flexible Connectors, Flexible Connectors, Monday Morning Minutes, Pumps, Piping and Installation, Vibration and Expansion Control

Centrifugal pumps in hydronic systems normally have flexible connectors on the inlet and outlet piping at the pump. Why are they there? Do we need …