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Variable displacement axial piston pumps
Products / AXIAL-PISTON UNITS
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Variable displacement axial-piston pumps in swashplate design are intended for hydraulic actuators combined of pump and motor, operating in closed circuit systems. Operate in stroke of mobile machines – harvesters, concrete mixers, paving compactors and other.
APV axial-piston pumps are easily controlled and relatively compact. Pump flow is directly proportional to the cylinder block speed and displacement varied with the swashplate positioning.
Flow direction is reversed with a tilt of the swashplate in either of the opposite directions from its neutral position.
Modular control valve assembling provides flexibility of control combinations.
MH – hydromechanical proportional control system. Due to the control system the swashplate is held in the required position, thus maintaining amount of the flow at the preset level.
ER 1 & ER 2 – electrohydraulic relay 3 positioned control sestem. Used for drive operating to the system turn on – turn off – turn on.
HD – hydraulic proportional control system. The swashplate is held in the required position, due to the hydraulic indicators. Used in
The design provides a possibility of making tandem combinations.
When the control handle is released, the swashplate returns to its initial position, and the flow to its zero.
Complete assembling and dismantling require just a standard set of hand tools.
How to order
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Notation example
Functional dependences
Efficiency, Flow and Input Power vs. Speed
(at Maximum Swashplate Angle) |
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Drain Leakage vs. Speed
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Control System
Due to the servo control, with a small movement of the control
handle the swashplate tilts through an angular rotation of ±18°.
With the control handle held in any position, pump displacement
varies within predeterminedlimits.
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| Control valve with orifices |
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Response Time
The time required for reversing flow direction is a
function of the orifice size in the control valve.
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Mounting dimensions
Technical specifications
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Displacement Code
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33
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71
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90
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112
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Displacement per Revolution Max.
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cm3
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33,3
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69,8
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89
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110,8
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Maximum Flow
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l/min
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113,5
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186,3
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218,9
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272,6
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Charge Pump Displacement
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cm3 |
12,3
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18,06
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Maximum Pressure in High Pressure Line
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MPa |
35,7
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35,8
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36,3
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Rated Pressure in High Pressure Line
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MPa |
22,5
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26,5
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26,9
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Maximum Pressure in Control Line
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MPa |
3,5
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Charge Pump Pressure
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MPa |
1,2 – 2,2
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Maximum Case Pressure
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MPa |
0,25
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Maximum Speed
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min-1 |
3590
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2810
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2590
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Minimum Speed
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min-1 |
500
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Rated Speed
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min-1 |
1500
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Maximum Swashplate Angle.
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Degr |
±18
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Weight (without fluid)
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kg |
45
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63
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78
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Rated Power
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kW |
18,7
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39,3
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63,3
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78,7
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 Download draft in PDF
Shaft options
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Code А
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Code В
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Code С
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Code D
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Code Е
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Mounting Dimensions for Tandem Combinations with Gear Pumps
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Code
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Z
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Dimensions [mm]
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Da
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M
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D
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b
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D1
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D2
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D3
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L1
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D4
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L2
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1
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9
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12,926+0,11
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-
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-
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-
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Ø82,57+0,04
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Ø91+0,22
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Ø106,4
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7,5
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M10-7H
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15min
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2
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11
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16,017+0,11
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3
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13
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19,133+0,11
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Ø101,62+0,04
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Ø110+0,22
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Ø146,1
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10
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M12-7H
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25min
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4
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-
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-
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D-6×13×16H9×3,5D10
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Ø13+0,11
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3, 5
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Ø82,57+0,04
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Ø91+0,22
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Ø106,4
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7,5
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M10-7H
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15min
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5
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D-6×18×22H9×5D9
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Ø18+0,11
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5
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Ø101,62+0,04
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Ø110+0,22
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Ø146,1
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10
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M12-7H
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25min
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6
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13
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19,133+0,11
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-
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-
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-
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Ø50,52+0,046
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Ø55,5+0,19
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7,5
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7
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-
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-
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D-6×18×22H9×5D9
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Ø18+0,11
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5
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