# Pressure

PRESSURE P030

The term “pressure” is commonly used in the positive displacement pump business, but not generally used by centrifugal pump people; they substitute the term head instead.

Here are some conversions you will find useful to convert pressure to liquid head in both the inch and metric systems:

newton per square meter
N/M Pascal (Pa) |
kilo –
pascal
kPa |
bar | kilogram force per square centi-meter
kgf/cm |
pound force per square inch
lbf/in |
foot of water | meter of water | millimeter of mercury
mm Hg |
inch of mercury
in Mg |

^{5} |
^{5} |
^{-4} |
^{-4} |
^{-4} |
^{-4} |
|||

1 Pascal equals 1 newton per square meter (1Pa = 1N/M^{2})

1 mm Hg is also called 1 “torr”

The international standard atmosphere (1 atm) = 101325 pascals or 1.01325 bar. This is equal to 1.03323 kgf/cm^{2} or 14.6959 lbf/in^{2}

1 millibar = 100 pascal (1mb = 100 Pa)

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- On February 16, 2018