This term refers to the pressure of crude oil when it arrives at a pipeline pump station.
Pressure on the inlet or suction side of the pump.
Measured pressure of drawing, extracting, or pulling natural gas/coal bed methane. (Extreme suction creates a vacuum.)
Compressor intake pressure as indicated by a manifold gauge set.
In refrigeration and air conditioning systems, the suction pressure' (also called the low side pressure) is the intake pressure generated by the system compressor while operating. The suction pressure, along with the suction temperature and the wet bulb temperature of the discharge air are used to determine the correct refrigerant charge in a system.