Dover Wilden Advanced P400, Engineering, Operation & Maintenance

Page: 17 / 56

H O W T O U S E T H I S E M S C U R V E
PX400 Performance 15 WILDEN PUMP & ENGINEERING, LLC
SETTING 4 PERFORMANCE CURVE EMS CURVE
8.2
GPM
Example data point = Example data point =
Figure 1 Figure 2
0.58
0.48
flow multiplier
air multiplier
This is an example showing how to determine flow rate and
air consumption for your Pro-Flo X™ pump using the Efficien-
cy Management System (EMS) curve and the performance
curve. For this example we will be using 4.1 bar (60 psig) inlet
air pressure and 2.8 bar (40 psig) discharge pressure and EMS
setting 2.
Step 1:
Identifying performance at setting 4. Locate
the curve that represents the flow rate of the
pump with 4.1 bar (60 psig) air inlet pressure.
Mark the point where this curve crosses the
horizontal line representing 2.8 bar (40 psig)
discharge pressure. (Figure 1). After locating
your performance point on the flow curve,
draw a vertical line downward until reaching
the bottom scale on the chart. Identify the flow
rate (in this case, 8.2 gpm). Observe location
of performance point relative to air consump-
tion curves and approximate air consumption
value (in this case, 9.8 scfm).
Step 2:
Determining flow and air X Factors. Locate
your discharge pressure (40 psig) on the verti-
cal axis of the EMS curve (Figure 2). Follow
along the 2.8 bar (40 psig) horizontal line until
intersecting both flow and air curves for your
desired EMS setting (in this case, setting 2).
Mark the points where the EMS curves inter-
sect the horizontal discharge pressure line.
After locating your EMS points on the EMS
curve, draw vertical lines downward until
reaching the bottom scale on the chart. This
identifies the flow X Factor (in this case, 0.58)
and air X Factor (in this case, 0.48).
Step 3: Calculating performance for specific EMS
setting.
Multiply the flow rate (8.2 gpm)
obtained in Step 1 by the flow X Factor multi-
plier (0.58) in Step 2 to determine the flow rate
at EMS setting 2. Multiply the air consump-
tion (9.8 scfm) obtained in Step 1 by the air
X Factor multiplier (0.48) in Step 2 to deter-
mine the air consumption at EMS setting 2
(Figure 3).
Figure 3
The flow rate and air consumption at Setting
2 are found to be 18.2 lpm (4.8 gpm) and 7.9
Nm
3
/h (4.7 scfm) respectively.
.58
4.8
gpm
(flow X Factor setting 2)
(flow rate for setting 2)
(air consumption for setting 4)
(air X Factor setting 2)
(air consumption for setting 2)
9.8
scfm
.48
4.7
scfm
8.2
gpm
(flow rate for setting 4)
Example 1