Alemite 9911-1 Manual De Servicio E Instalación página 7

Pump performance
Ability of pump to deliver material is based
on pressure (psi/bars) and quantity
(cfm/lpm) of air supplied to motor and
amount of fluid discharge backpressure to be
overcome within system.
Fig. 2 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
8 000
500
150 psi (10.3 bar) ∆ 150 psi (10.3 bar) ∆
7 000
6 000
400
5 000
100 psi (6.9 bar) ∆ 100 psi (6.9 bar) ∆
300
4 000
3 000
200
50 psi (3.4 bar) ∆ 50 psi (3.4 bar) ∆
2 000
100
1 000
0
0
Legend:
Δ
Air pressure
– – –
Air consumption
–––––
Material discharge pressure
NLGI 1 grease 75 °F (25 °C)
1 2
1
Delivery
7
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) ∆
3 4
2
Fig. 2
cfm lpm
40
1 100
1 000
35
900
30
800
25
700
600
20
500
15
400
300
10
200
5
100
5 Pounds per minute
Kilograms per minute