Pumps characteristic curve are frequently in head - feet or metres - and also a conversion to press scales typically used in push gauges - choose psi or bar - might be required.

You are watching: Convert ft of head to psi

Converting Head come Pressure

converting head in feet to push in psi

Pumps characteristic curve in feet the head deserve to be convert to push - psi - through the expression:

p = 0.433 h SG (1)

where

p = pressure (psi)

h = head (ft)

SG = specific gravity of the fluid

convert head in metre to pressure in bar

Pumps characteristic curves in metre of head can be converted to push - bar - by the expression:

p = 0.0981 h SG (2)

where

h = head (m)

p = press (bar)

converting head in metre to push in kg/cm2

Pumps characteristic curve in metre of head deserve to be converted to push - kg/cm2 - by the expression:

p = 0.1 h SG (2b)

where

h = head (m)

p = push (kg/cm2)

Converting press to Head

Since press gauges frequently are calibrated in pressure - psi or bar - a conversion to the heads typically used in pump curves - prefer feet or meter - may be required.

Converting pressure in psi come head in feet

h = 2.31 p / SG (3)

where

h = head (ft)

p = pressure (psi)

Converting pressure in bar to head in metre

h = ns 10.197 / SG (4)

where

h = head (m)

p = pressure (bar)

Converting push in kg/cm2 come head in metre

h = p 10 / SG (4b)

where

h = head (m)

p = push (kg/cm2)

Example - convert Pump Head - feet - to press - psi

The press - psi - the a water pump operating with head 120 ft deserve to be calculated with eq. 1 as:

p = 0.433 (120 ft) (1)

= 52 psi

Example - Converting push - psi - to Pump Head - feet

The head infeet water column have the right to be calculate from press 100 psi with eq. 3 as:

h = 2.31 (100 psi) / (1) = 231 ft

Where details gravity the water = 1.

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Feet that Head Water to psi

Head(ft)Pressure(psi)
1 0.43
2 0.87
3 1.30
4 1.73
5 2.17
6 2.60
7 3.03
8 3.46
9 3.90
10 4.33
20 8.66
30 13.0
40 17.3
50 21.7
60 26.0
70 30.3
80 34.7
90 39.0
100 43.3
120 52.0
140 60.6
160 69.3
180 78.0
200 86.6
250 108
300 130
350 152
400 173
500 217
600 260
700 303
800 346
900 390
1000 433
water at 62°F (17°C)

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Download push vs head royal units as pdf file

*

Download water pressure vs head - SI devices as pdf file

Head vs. Pressure when taking care of Liquids of different Density

LiquidSpecific GravityHead (ft)Pressure(psi)
Water 1.0 100 43.3
Kerosene 0.8 100 36.6
Sulphuric Acid 1.8 100 77.9

Identical pumps will construct the exact same head once running at the same speed yet the discharge push is quite different due to the various densities the the liquids. It deserve to be simpler to comment on the power pumps in regards to head fairly than pressure because the usage of head makes the pump curve applicable to any type of liquid nevertheless of density.