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Pump performance
Ability of pump to deliver material is based
on pressure (psi/bar) and quantity (cfm/lpm)
of air supplied to motor and amount of fluid
discharge backpressure to be overcome
within system.
Pump performance contains 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 to material discharge pressure in
psi (bar) (left Y axis).
Pump performance
Delivery versus discharge pressure and air consumption
bar
psi
160
11
10
140
9
120
8
7
100
6
80
5
60
4
3
40
2
20
1
0
Legend:
Δ
Air pressure
– – –
Air consumption
–––––
Material discharge pressure
SAE 10 oil at 75 °F (25 °C)
150 psi (10.3 bar) ∆
150 psi (10.3 bar) ∆
100 psi (6.9 bar) ∆
100 psi (6.9 bar) ∆
50 psi (3.4 bar) ∆
50 psi (3.4 bar) ∆
0
2
4
10
20
100 psi (6.9 bar) ∆
100 psi (6.9 bar) ∆
50 psi (3.4 bar) ∆
50 psi (3.4 bar) ∆
6
8
10
30
40
Delivery
7
cfm
24
150 psi (10.3 bar) ∆
150 psi (10.3 bar) ∆
21
18
15
12
9
6
3
12
14
16
Gallons per minute
50
60
Liters per minute
Fig. 2
lpm
600
500
400
300
200
100
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