Performance Charts
Test Conditions: The pump was tested in water with
the inlet submerged. The air pressure was set 10 psi
(0.7 bar) higher than the outlet pressure.
How to Use the Charts
1. Choose a flow rate and outlet pressure that falls
below the Power Limit Curve. Conditions outside
of the curve will decrease the life of the pump.
2. Set the VFD frequency corresponding to the
desired flow rate. Flow rates will increase with
outlet pressure lower than 10 psi (0.7 bar) and
with high inlet head pressure.
3. To prevent inlet cavitation erosion, the Net
Positive Suction Head Available (NPSHa) of your
system should be above the Net Positive Suction
Head Required (NPSHr) line shown on the chart.
4-Pole AC Pump (04A), (05A), or (06A) with 2hp VFD
KEY
A
Power Limit Curve
B
Net Positive Suction Head Required
The shaded area is recommended for continuous
duty.
Frequency — Hz(Pump Speed Cycles per Minute)
Outlet
Pressure
PSI
(bar,
MPa)
A
B
0
10
(0.7, 0.07)
20
(1.4, 0.14)
30
(2.1, 0.21)
40
(2.8, 0.28)
50
(3.4, 0.34)
60
(4.1, 0.41)
70
(4.8, 0.48)
80
(5.5, 0.55)
0
10
(3.1)
20
(6.1)
30
(9.1)
40
(12.2)
50
(15.2)
60
(18.3)
70
(21.3)
80
(24.4)
0
5
(19)
10
(38)
15
(57)
20
(76)
25
(95)
30
(114)
35
(132)
40
(151)
0
10
(36)
20
(72)
30
(109)
41
(145)
51
(181)
61
(217)
71
(253)
81
(290)
NPSHr
feet
WC
(meters
WC)
Fluid Flow — gpm (lpm)
50
334188P
Tel: 866-777-6060
Fax: 866-777-6383
Springer Pumps, LLC
Website: www.springerpumps.com
Int'l: +001 267 404 2910
