Schwing SP 750-18 - Output Charts

128
Appendix
SP 500 / 750-15 / 750-18 / 1000 / 1250 Operation Manual
Output Charts
The hydraulic pumps that drive your concrete pump are
horsepower controlled. That means that when pressure
rises past a certain point (known as the breakpoint), the
pumps change their displacement per revolution, result-
ing in less ow and fewer strokes per minute. The rea-
son for this is so the pumps will not stall your engine by
drawing too much horsepower. Output charts show the
horsepower curve (in kilowatts, or Kw) of the concrete
pump hydraulic circuit. From them, you can determine
the:
• Maximum concrete pressure of the pumpkit.
• Maximum output (in cubic yards per hour) of the
pumpkit.
• Maximum strokes per minute of your pumpkit.
• Maximum output (in liters per minute, L/min) of
your hydraulic pumps,
• Output at various pumping pressures.
• Condition of your hydraulic pumps when used in
conjunction with a owmeter.
• Breakpoint of your hydraulic system.
An explanation of an output chart is shown on the fol-
lowing pages, followed by some examples of chart us-
age. The output chart of the pumpkit shipped with this
manual is shown later.
13
BPL 1200 HDR-23
230mm x 2000 mm
CONCRETE OUTPUT (cu yd / h)
NUMBER OF STROKES
(stroke / min.)
OIL VOLUME
(liter / min.)
NUMBER OF STROKES
(stroke / min.)
OIL VOLUME
(liter / min.)
26 39 52 65 78 92 105 118 131 1440
103
157 170 183
ROD SIDE
HYDRAULIC RELIEF VALVE IS SET AT
300 BAR MAX. PRESSURE (4350 PSI).
PUMP SPEED
2100 RPM
PERFORMANCE CHARACTERISTICS OF
THE AXIAL PISTON HYDRAULIC PUMP
125 mm / 80 mm x 2000 mm 2 x A7VO-107
2 x 66KW
Differential Hydraulic Cylinder
Bore dia. / Rod dia. x Stroke length
Hydraulic Pumps
Type / KW
Material Cylinders
Bore dia. x Stroke length
PISTON SIDE
PISTON
SIDE
ROD
SIDE
100 200 300 400
350
100 200 300 40050 150 250
500
5 10 15 20 25
5 10 15 20 25 30
15.5
PISTON SIDE
(bar)
ROD SIDE
(bar)
CONCRETE
PRESSURE
(BAR)
7
14
21
28
34
41
48
55
62
70
76
83
90
97
103
110
117
124
131
138
CONCRETE
PRESSURE
(PSI)
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
1285 88.6
52758
350
50
100
150
200
250
300
50
100
150
200
250
300
350
OIL PRESSURE (BAR)
30
196
170.5
26
Slewing cylinder 80 / 45 x 185
breakpoint
178 bar
output chart explain.eps
Pumpkit model
Hydraulic oil
pressure shown
here, ranging from
zero to the relief
valve setting.
Concrete pressure
is shown here.
Max. pressure is
shown for both
piston and rod side
The breakpoint
specification is
listed here.
Hydraulic liters per
minute, and the
corresponding
strokes per minute,
Concrete output is
shown here, with max
shown for both
piston and rod
Information about the
pumpkit and hydraulic
pumps is shown here.