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Parts per million
Parts per million (ppm) is used to denote relative proportions in measured quantities; particularly in low-value (high-ratio) proportions.
Performance curve
The pump performance curve shows the correlation between media flow (Q) and the pressure differential or head (H) that the pump creates.
Pilot Pump
A smaller pump used as a supplemental pump in booster applications.
pH is the measure of the acidity or alkalinity of a solution and ranges from 0-14.
Pilot valve
Pilot valves are often used in larger refrigeration plants with many consumers.
Pipe heat loss
Pipes that distribute a heating medium lose some heat to the surroundings.
Pitting corrosion
Pitting corrosion is a localized form of corrosive attacks. Pitting corrosion forms holes or pits on the metal surface.
Plate heat exchanger
A plate heat exchanger is a heat exchanger that is used to transfer heat from one fluid to another.
Pipe insulation
Pipes carrying hot media are insulated to minimise unintentional heat loss.
Power factor
The power factor is the phase angle between voltage and current (cosφ).