Pumps & Accessories Flashcards
What is a Centrifugal Pump and How does it work?
A centrifugal pump is a device that moves liquid by converting rotational energy from a motor into fluid flow. It works by spinning an impeller inside a casing, which creates a vacuum that draws fluid in and pushes it out through the discharge port.
What are pump curves and how do you read them?
Pump curves are graphs that show a pump’s performance. They typically display the relationship between flow rate (GPM) and head (pressure) at different operating points. To read them, find the desired flow rate on the horizontal axis, then move up to the curve to find the corresponding head on the vertical axis.
What is Pump Head?
Pump head is the height to which a pump can raise fluid, usually measured in feet or meters. It represents the energy imparted to the fluid to overcome resistance and move it through the system.
What are the styles of pumps and their names from Taco?
Circulator Pumps
End Suction Pumps
Vertical In-Line Pumps
Split Case Pumps
Close-Coupled Pumps
What is impeller trimming and what does it do?
Impeller trimming is the process of reducing the diameter of an impeller to match a pump’s performance to a specific duty point. It adjusts the flow rate and head to improve efficiency and meet system requirements.
What are motor speeds and their impact on selections?
Motor speeds, measured in RPM (revolutions per minute), affect a pump’s performance. Higher speeds can increase flow rate and head but may lead to more wear and noise. Selecting the right motor speed ensures optimal efficiency and longevity of the pump.
What are common pump accessories?
Strainers: To filter out debris.
Check Valves: To prevent backflow.
Pressure Gauges: To monitor system pressure.
Vibration Isolators: To reduce noise and vibration.
Air Separators: To remove air from the system.
Expansion Tanks: To manage fluid expansion.
What are the steps of a pump install?
Preparation
Site Inspection
Mounting
Piping
Electrical Wiring
Priming
Testing
Final Adjustments
What is NPSH and how does it affect pumps?
NPSH Available (NPSHa): Pressure available in the system.
NPSH Required (NPSHr): Pressure needed by the pump.
What do you need to select a pump?
Flow Rate (GPM)
Head (Pressure)
Fluid Type
System Design
Operating Conditions
Power Supply
Efficiency Requirements
