Words & Definitions for the letter P

Package Units
Packing
Piston
Pitot Tube
Polyphase Motor
Potential Relay
Potentiomenter
Power Factor
PPM (Parts Per Million)
Pressure
Pressure, Gauge
Pressure, Head
Pressure, Suction
Pressure Drop
Pressure Gauge
Pressure Regulator, Evaporator
Pressure Switch
Protector, Circuit
Proton
PSI
PSIG
Psychrometer or Wet
Psychrometric Chart
Psychrometric Measurement
Pump
Pump, Down
Pump, Reciprocating
Pump, Screw
Purging
Pyrometer