China Supplier Factory for LA4VSO Series Equivalent Replacement Hydraulic Piston Pump for Open Loop Circuits
Introducing our high-quality Axial Piston Variable Pump, expertly designed for hydraulic drives in open loop circuits. As a leading factory in China, we pride ourselves on delivering top-tier products that meet the demands of various industrial applications. Our commitment to excellence makes us a preferred choice among suppliers seeking reliable hydraulic solutions. Experience superior efficiency and performance with our axial piston variable pumps, crafted to enhance your operations. Trust us for all your hydraulic needs and elevate your productivity today!
Port B and port S 90°offset; Auxiliary pressure port B1 Metric fixing screws
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√
√
√
√
√
√
13
Port B and S 90°offset; Pressure connection B1 connected by flange
√
√
√
√
√
√
√
25
Through drive
Without auxiliary pump, without through drive
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√
√
√
√
√
-
N00
Technical Data
Performance parameters (these figures do not consider mechanical and volumetric efficiency)
Size
40
71
125
180
250
355
500
Displacement (Vg max)
cm³/r
40
71
125
180
250
355
500
Max.speed (n max1)
rpm
2600
2200
1800
1800
1500
1500
1320
Max.output flow
n=n max
L/min
104
156
225
324
375
532
600
n=1500rpm
L/min
60
107
186
270
375
532
—
Max.power
n=n max
kW
61
91
131
189
219
310
385
n=1500rpm
kW
35
62
109
158
219
310
—
Max.torque
△P=35MPa
N.m
223
395
696
1002
1391
1976
2783
△P=10MPa
N.m
64
113
199
286
398
564
795
Weight(approximately)
kg
40
54
87
103
186
206
318
Outline drawing
Size
Unit
40
71
125
180
250
355
500
Control moving distance
mm
14.2
17.3
20.7
20.7
25.9
25.9
32.6
Control area
cm²
3.9
6.4
9
9
14.4
14.4
18.8
Control volume
cm³
5.5
11
18.7
18.7
37.3
37.3
61.4
Min.control pressure
MPa
3
3
5
5
5
5
5
Control time 20MPa pressure
s
0.1
0.1
0.1
0.1
0.2
0.2
0.8
(2)EO Hydraulic displacement control HD
Outline
In the EO electric control work, the pump flow could set by proportion direction valve. Meanwhile, pump's current flow through inductance type position transducer feedback signal.
This pump could reset the cylinder's zero position by the spring controls in the situation of normal pressure. Do not reset at high-pressured work. Simultaneously, in order to reduce controls cylinder's loss of flow, all size of hydraulic pressure fluid cylinder cavity is sealed.
Outline drawing
Size
Unit
40
71
125
180
250
355
500
Control cylinder’s moving distance
mm
14.2
17.3
20.7
20.7
25.9
25.9
32.8
Control cylinder area
cm²
8.1
12.6
18.1
16.1
28.3
28.3
38.2
Control volume
cm³
11.4
21.5
37.5
37.5
73.2
73.2
124.5
Min.control pressure
MPa
10
10
10
12.5
12.5
12.5
15
Max.control pressure
MPa
31.5
31.5
31.5
31.5
31.5
31.5
31.5
Control time
s
0.1
0.12
0.2
0.2
0.25
0.25
0.3
(3)LR Power control LR
Outline
At the very beginning, the control scope could use the mechanical way to set, the setting value scope could use the spring and screw to adjust. When the pressure decreases, we could adjust spring and enter its starting position, the setting range of preset value: 3.5MPa--35MPa. The smallest and the biggest angle of rotation's limit can use the mechanical way, adjustment to Vg max 50%.
Frequently Asked Questions (FAQ)
Is this pump a direct equivalent replacement for the Rexroth LA4VSO series?
Yes, this hydraulic axial piston pump is designed as a fully compatible, equivalent replacement for the Rexroth LA4VSO series. It matches the mounting flange dimensions, shaft configurations, and performance parameters, allowing for seamless integration without system modifications.
What are the primary control options available for this pump series?
The pump supports multiple control configurations to meet diverse industrial needs, including Pressure Control (DR), Power Control with Hyperbolic curve (LR), Manual Control (MA), Electronic Control (EO), and Hydraulic Pilot Control (HD).
What is the maximum nominal pressure rating of the LA4VSO equivalent pump?
This series is designed for high-pressure industrial applications, with a nominal pressure rating reaching up to 35 MPa (350 bar), ensuring dependable performance under heavy workloads.
Can this pump operate with fire-resistant hydraulic fluids?
Yes. While standard mineral oils require no special marking, version "E" is specifically designated and sealed to operate safely with HF, HFB, and HFC fire-resistant hydraulic fluid mediums.
What design features contribute to the long service life of this pump?
The pump features high-precision bearings for load distribution, a hydrostatic balance slipper design to minimize mechanical wear on the swashplate, and a compact structural design that reduces vibration and operating noise.
