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CONTROL VALVES · CHARGE PUMPS

Hydraulic control valves — by Function

84 valves and charge pumps in 6 functional groups. Choose by the type of control you need — no need to know a part number in advance.

Pressure & Flow Control21Electric Proportional Control17Hydraulic Pilot & Manual Control9Protection & Auxiliary Parts9Cartridge Valves & Spool Parts7Charge Pumps21Charge pump table21

Pressure & Flow Control

21

Constant pressure, constant power and load-sensing controls. DR = constant pressure, LR = constant power / load sensing, LE = electric load sensing.

Electric Proportional Control

17

Proportional solenoid driven; displacement infinitely adjustable by electrical signal. EP = proportional, EZ = two-point, ED/EK = on-off.

Hydraulic Pilot & Manual Control

9

Hydraulic pilot or manual lever control. HD = hydraulic pilot, HA = automatic (pressure-related), HW = manual.

Protection & Auxiliary Parts

9

Relief valves, flushing valves, balance valves, oil filters, pressure cut-off spools and charge pressure valves.

Cartridge Valves & Spool Parts

7

DA cartridge valves, D4/D8 directional valves and the 191 valve, for manifold cartridge mounting.

Charge Pumps

21

Charge pumps for closed circuits, both single and tandem (with second stage). Spline tooth counts are listed in the parameter table above.

Charge pump parameter table

SPECIFICATION
No.ModelSpline teeth
1A4VG28-AZ=16 · Z=0
2A4VG28-B1Z=16 · Z=9
3A4VG40-AZ=13 · Z=15
4A4VG40-BZ=15
5A4VG40-CZ=15 · Z=13
6A4VG40-DZ=15 · Z=9
7A4VG40-EZ=15 · Z=14
8A4VG56-AZ=21 · Z=15
9A4VG56-CZ=21 · Z=14
10A4VG56-DZ=21 · Z=9
11A4VG56Z=21 · Z=11
12A4VG56Z=21 · Z=13
13A4VG71-AZ=22 · Z=13
14A4VG71-AZ=22 · Z=14
15A4VG71-AZ=22 · Z=15
16A4VG71-B (rhombic base)Z=13 · Z=14, Z=15
17A4VG71-CZ=22 · Z=9
18A4VG71-DZ=22 · Z=0
19A4VTG71-AZ=13 · Z=0
20A4VTG71-BZ=22 · Z=0
21A4VTG90-AZ=13 · Z=0

Z indicates the number of spline teeth. Where two Z values are given, the first is the driving and the second the driven spline. This table covers charge pumps only; other control valves are listed in the catalogue by host pump model only, without separate specifications.

Note: the catalogue lists these valves by name and host pump model only; individual specifications (port size, pressure, flow) are not published. For details, enquire by model and we will confirm with the factory.