Learning outcomes
- Explain the key principles of pump types, curves and system head.
- Carry out a structured practical check or configuration task.
- Recognise common faults, risks and evidence needed for diagnosis.
Module 4 · Lesson 1
Pump types, curves and system head
Understand centrifugal and positive-displacement pumps, duty points, system curves, NPSH and efficiency.
Before you begin
Pump curve, system data and operating measurements.
Safety: Use site procedures, approved test equipment and competent supervision. Never bypass a protection or interlock without formal control.
Step-by-step learning
- Identify pump type and intended service.
- Plot or estimate static head and friction losses to form the system curve.
- Find the expected duty point on the pump curve.
- Compare flow, pressure, power and efficiency with the design.
Ian's practical tips:
- A pump can be electrically healthy but hydraulically operating far from its best efficiency point.
- Never throttle a positive-displacement pump without proper relief protection.
Fault-finding questions
- What should be happening, and what evidence proves it?
- Where is the last known correct signal, voltage, state or process condition?
- What changed immediately before the fault?
- Can the system be divided into smaller testable sections?
Practical activity
Create a one-page test record for this lesson. Include expected values, measured results, equipment used, risks controlled, defects found and the final proven condition.