A3HM Series High Pressure

Variable Displacement Piston Pumps■ "A3HM" Series Variable Displacement Piston Pumps
Geometric Displacement
Pump Type

cm3/rev

Graphic Symbol
125102050100200 300Maximum
OperatingPressure
MPaPage

35

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A3HM SeriesHigh Pressure
Variable Displacement
Piston Pumps

A3HM18A7H Series High Pressure
Variable Displacement Piston Pumps
A3HM28
A3HM45
M
O

A3HM63
A3HM85
A3HM100★ ‌Three control methods are available:Pressure Compensator Type/Pilot Pressure Control Type Pressure Compensator/Load Sensing Type● Consult Yuken for "A3HM" Series High Pressure Variable Displacement Piston Pumps details.

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A3HM Series High Pressure Variable Displacement Piston Pumps

PISTON PUMPS
A3HM Series Variable Displacement Piston Pumps - Single Pump
A3HM Series"A3HM" series piston for open circuit pumps match the requirements of construction machineryand mobile equipment. Drastically compact and lightweight. Suitable for mobile products.

■ Features● Compact and lightweight compared with conventional pumps.
● Applicable for medium pressure hydraulic systems: Rated Pressure 31.5 MPa and Max.
Pressure 35 MPa.

● We offer 6 models in the geometric displacement range from 18.6 to 100.7 cm3/rev. Available
for a wide range of applications.

● Through-drive type is employed for standard models. Driven side pumps with displacement
volume up to the same displacement as that of the driving pump can be connected. Widerange of maximum flow due to it.

■ Specifications
Model Numbers

A3HM18

A3HM28

A3HM45

A3HM63

A3HM85

A3HM100

63.5

85.6

100.7

44.0

61.3

70.5

2600（2700）

2500（2700）

2300（2600）

Geometric
Displacement

cm3/rev

18.6

28.7

45.7

Minimum Adj. Flow

cm3/rev―17.8

27.5

Rated PressureMPa

31.5

Max.Pressure★1

MPa

Pressure Adj. Range

MPa

Allowable Shaft Speedr/min

Max.★235★1

3.0 - 31.53400

3200（3600）

2700（3300）

Min.

600

Suction Pressure−20 kPa - +400 kPa

Normal Pressure：0.1 MPa or lessSurge Pressure：0.4 MPa or less (Allowable duration for surge pressure 0.1 sec or less)

Drain Pressure
Hydraulic Fluid

Petroleum Based Oils★3

Seal Material

FKM (Fluoro Rubber)

Mass★41214

21

24.5/2536

36★1. If operating pressure exceeds the rated pressure due to surge pressure, make sure that it does not exceed the max. pressure. Please contact“P”★1★2 “X”
Yuken for further information.
★2. Minimum flow values are shown in brackets.
★3. Please contact Yuken regarding the use of non-petroleum based oils.
★4. Pressure Compensator Control Type
★1
“S”

Pressure
Compensator Type★1

★2

Pilot Pressure
Control Type“07”
Pressure
Compensator

“P”

“X”

★1

“S”

“DR”

★3
“X”

“14”

Load Sensing
Type
★2

“P”

★1
“X”

Performance Characteristics

Output Flow →“01”

Graphic Symbols

Output Flow →Control Type

“DR”

“P”
“S”

“DR”

Output Flow →■ Control TypePressure →Pressure →Pressure →Explanation●When the system pressure increases and comesclose to the preset cut-off pressure, the pump flow
decreases automatically while maintaining the set
pressure as it is.
●The output flow and full cut-off pressure can be
manually adjusted.
●The pump is used in combination with a pilot relief
valve or proportional pressure control valve.
●By controlling the pilot pressure, the full cut-off
pressure can be remote-controlled according user
requirements.
●This is an energy-saving type control which
maintains the pump flow at the absolute minimum
necessary level to operate the actuator.
●This type of control automatically regulates theoutput flow so that the inlet-outlet differential
pressure of the flow control valve at the output sideis constant.

★1. Flow adjustment function is not available on A3HM18.
★2. Pilot relief valve/ proportional★1 pressure control valve is not supplied with the pump. Please arrange it separately.
★3. Flow control valve is not supplied with the pump. Please arrange it separately.
“S”

“DR”

A3HM Series High Pressure Variable Displacement Piston Pumps

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