Performance Curves - SKF Lincoln Guía De Instalación Y Mantenimiento

Performance curves

A pump's ability to deliver fluid is based on
the pressure (psi/bar) and quantity (cfm/lpm)
of air supplied to the motor and the amount
of fluid discharge, back pressure to be over-
come in the system.
Figure 4 depicts different curves based on
three different air pressures.
Curves relate delivery in gallons (liters) per
minute (X axis) to air consumption in cubic
feet (liters) per minute (right Y axis) and fluid
discharge pressure in psi/bar (left Y axis).
Delivery versus discharge pressure and air consumption
SAE 10 oil at 75 °F (24 °C)
Bar
11
10
9
8
7
Material discharge
6
pressure
5
4
3
2
1
Air pressure
Air
consumption
Material discharge
pressure
psi
160
150 psi (10,3 bar)
140
120
100 psi (6,9 bar)
100
80
Correct leak
60
50 psi (3,4 bar)
40
50 psi (3,4 bar)
20
0
0 2 4
10 20
150 psi (10,3 bar)
100 psi (6,9 bar)
6 8 10 12
30 40
Delivery
5
cfm lpm
24
21
600
18
500
15
400
12
300
9
200
6
100
3
0
14 16 Gallons per minute
50 60 Liters per minute
Fig. 4
Air
consumption