8
WILDEN PUMP & ENGINEERING CO.
SECTION 5H
70/30 OPERATING CONDITION
MODEL A8 PLASTIC ACCU-FLO™
ULTRA-FLEX™-TEFLON
®
-FITTED
Water Discharge Flowrate
A8 Plastic Accu-Flo™ Ultra-Flex™/Teflon
®
-Fitted
@ 70 / 30 operating condition
10
20
30
40
50
60
70
Speed
[114]
[151] [189]
[38]
[76]
[227] [265]
0
20
40
60
80
100
120
140
160
180
200
220
GPM
[
l
/min]
SPM
SECTION 5G
PERFORMANCE CURVES
MODEL A8 PLASTIC ACCU-FLO™
ULTRA-FLEX™/TEFLON
®
-FITTED
Height ...........................770.0 mm (30
5
⁄
16
")
Width ...........................491.3 mm (19
11
⁄
32
")
Depth...................................254 mm (10")
Ship Weight .Polypropylene 33.8 kg (74.6 lbs.)
PVDF 42.9 kg (94.6 lbs.)
Air Inlet..................................1.27 cm (
1
⁄
2
")
Inlet........................................5.08 cm (2")
Outlet .....................................5.08 cm (2")
Suction Lift .....................3.35 m Dry (11')
8.53 m Wet (28')
Displacement per
Stroke ...................... 1.74 l (0.46 gal.)
1
Max. Flow Rate........386.1 lpm (102 gpm)
Max. Size Solids...................6.35 mm (
1
⁄
4
")
1
Displacement per stroke was calculated at 4.8
Bar (70 psig) air inlet pressure against a 2 Bar
(30 psig) head pressure.
Example: To pump 189 lpm (50 gpm)
against a discharge pressure head of 2.7
Bar (40 psig) requires 5.5 Bar (80 psig)
inlet air pressure, 85 Nm
3
/h (50 scfm) air
consumption and a pump speed of 120
strokes/minute. (See dot on chart.)
Caution: Do not exceed 8.6 Bar (125 psig) air
supply pressure.
Flow curves are for “optimal speed” conditions only. The “optimal speed” is that speed which
provides the maximum flow under a particular air and fluid pressure condition. The optimal
speed varies for different fluid and air pressures. Recommendations for optimal speed can be
found on the right side of the flow curve.
Flow rates indicated on chart were determined by pumping water.
For optimum life and performance, pumps should be specified so that daily operation
parameters will fall in the center of the pump performance curve.
20
40
60
80
100
120
140
160
PSIG
20
40
60
80
100
120
FEET
0
25
50
75
100
125
150
175
200
225
250
275
300
BAR
0
1
2
3
4
5
6
7
8
Optimal Speed
0.3
0.4
0.5
0.6
0.7
0.8
0.9
(20)
[34]
(40)
[68]
(60)
[102]
(80)
[136]
GPM
[
l
/min]
Water Discharge Flowrates
[76]
[151] [227] [303] [378]
[454] [530]
Discharge Pressure
[606]
Sec / Stroke
Interval
[150]
[120]
[100]
[86]
[75]
[67]
[SPM]
[200]
This curve demonstrates the flow
created when the stroke rate is modi-
fied under a static air and fluid pres-
sure condition. This curve can be
applied to different pressure condi-
tions to estimate the change in flow
due to stroke rate.
