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BUNA–N, EPDM, AND POLYESTER ELASTOMER DIAPHRAGM MODELS
KEY:
FLUID OUTLET PRESSURE – BLACK CURVES
AIR CONSUMPTION – GRAY CURVES
bar psi
9.6
9.0
8.3
120 psi
7.6
8.3 bar
7.0
100 psi
6.2
7 bar
5.5
4.9
70 psi
4.1
4.9 bar
3.5
2.8
40 psi
2.8 bar
2.1
1.4
0.7
gpm
liters/min
19
To find Fluid Outlet Pressure (bar/psi) at a specific fluid flow (lpm/gpm)
and operating air pressure (bar/psi):
1. Locate desired flow along bottom of chart.
2. Follow vertical line up to intersection with selected fluid outlet pres-
sure curve (black). Follow left to scale and read fluid outlet pressure.
To find Pump Air Consumption (m /min or scfm) at a specific fluid flow
(lpm/gpm) and fluid pressure (bar/psi):
1. Locate desired flow and pressure on chart.
2. Interpolate air consumption, noting gray lines of constant air con-
sumption.
PERFORMANCE CHART
2 scfm
0.06 m /min
5 scfm
0.1 m /min
10 scfm
0.3 m /min
38
57
FLUID FLOW (TEST FLUID: WATER)
15 scfm
0.4 m /min
20 scfm
0.6 m /min
25 scfm
0.7 m /min
113.5
76
95
This pump was tested in water, with a buna–N diaphragm
and the inlet submerged. For conditions different from this, reduce the
flow as follows.
SUCTION LIFT:
Height of Inlet Above
Surface of Fluid
1.52 m (5 ft)
3.05 m (10 ft)
4.57 m (15 ft)
40 scfm
1.1 m /min
30 scfm
0.8 m /min
132.5
151.5
Reduce
Flow By:
15.1 liters/min (4 gpm)
30.3 liters/min (8 gpm)
53 liters/min (14 gpm)
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