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Sensor, Pilot operated valve, Hydraulic pump, Control valve, Hydraulic valve
Text version of the page
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BUCHER
HYDRAULICS
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1.2 Non-standard symbols used in the text
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Check nut
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Hexagonal-head screw ( TE screw)
Socket head screw (TCE screw)
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O-Ring *\^) Woodruff key
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Lock washer
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Dynamometric spanners
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Version with front and rear cover in cast iron, available
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Square key
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4
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2
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Technical information
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2.1 Identifying the rotation direction
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The rotation direction of a gear pump is identified by looking at the pump from the front and with the drive gear turned up-
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Pumps with a unidirectional rotation (D or S) have the denomination AP.
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wards (see figures below).
Pumps with clockwise rotation (D) have a drive gear which turns clockwise, with the suction port on the left and the pressure port on the right.
Pumps with counterclockwise rotation (S) have a drive gear which turns counterclockwise, with the suction port on the right and the pressure port on the left.
The figure also shows the pressure flow inside the pumps as the oil is transferred from the suction port to the pressure
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Pumps with reversible rotation have the denomination APR.
It is possible to change the rotation direction of the entire range of pumps without having to replace any component, except for the AP100 group, for which it is necessary to replace the front cover.
To ensure a good technical result, we recommend in any case that such inversion be carried out at our factory.
Technical descriptions are available on request, which show the correct procedure for the pump rotation inversion.
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port.
As regards reversible pumps (R), the ports are alternatively for suction and pressure.
D Right-hand rotation
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D
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Pressure behavior
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Suction
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- Pressure
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S
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Left-hand rotation
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Pressure behavior
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Suction
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Pressure
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R
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Reversible rotation
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R Pressure behavior
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200-P-991218-E-02/09.07 AP
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4/96
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