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/M2 or

Pascal

(Pa)

kilo –

pascal

kPa

bar kilogram force per square centi-meter

kgf/cm2

pound force per square inch

lbf/in2

foot of water meter of water millimeter of mercury

mm Hg

inch of mercury

in Mg

1
0.001
1×105
1.02X105
1.045 X10-4
3.35X10-4
1.02 X 10-4
0.0075
2.95 X 10-4
1000
1
0.01
1.02 X10-2
0.145
0.335
0.102
7.5
0.295
100000
100
1
1.02
14.5
33.52
10.2
750.1
29.53
98067
98.07
0.981
1
14.22
32.81
10
735.6
28.96
6895
6.895
0.069
0.0703
1
2.31
0.703
51.72
2.036
2984
2.984
0.03
0.0305
0.433
1
0.305
22.42
0.882
9789
9.789
0.0980.
0.1
1.42
3.28
1
73.42
2.891
133.3
0.133
0.0013
0.0014
0.019
0.045
0.014
1
0.039
3386
3.386
0.0338
0.0345
0.491
1.133
0.345
25.4
1

1 Pascal equals 1 newton per square meter (1Pa = 1N/M2)

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/cm2 or 14.6959 lbf/in2

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

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Posted

  • On February 16, 2018