Pub.EL-0121-2"A3HG" Series High Pressure Variable
Displacement Piston Pumps
High pressure piston pumps of globally common speciﬁcations conforming tointernational mounting standards（ISO)

FeaturesFeature 1 Conforming to International Standards

Feature 2 High Pressure and wide ﬂow range

We have widened the range and now have available pumps

Maintaining the high performance of our A3H pumps, the improved

not only with JIS mounting but also ISO3019-1 and ISO3019-2

variants as standard depending on market needs. Both Keyed

A3HG series now oﬀers a nominal pressure of 31.5MPa. With awide ﬂow range, varying from 16cm3/rev to 180cm3/rev. Supporting

Shaft and Spline Shaft are available as standard design.

a wide range of applications as mid-high load capacity pumps.

Feature 3 Through-drive System Adopted as A Standard Feature

Feature 4 Wide Variety of Control Modes

The through-drive system adopted as a standard feature allows

Four control modes are available to support various functions:connecting a pump having the same capacity as the driving
pump on the non-driven side, increasing the maximum ﬂowrange. Any pump conforming to international standards can beused on the non-driven side; replacement in machines can bereadily done.

Pressure Compensator Type

Pilot Pressure Control Type Pressure Compensator
Constant Power Control Type with External Pilot
Load Sensing Type

Mounting
Region and Nation
Frange/Port CodeRegion and Nation

E1/ E2Europe

U1

North America

U2

United Kingdom

J1Japan

Mounting FlangeStandards

Number of Pump Mtg. Bolts

Frange/Port CodeStandards

Series Number2Bolts

4Bolts

E1/ E2

Conforms to ISO 3019-2

A3HG16○-U1

Conforms to ISO 3019-1

A3HG37○○U2

Conforms to ISO 3019-1

A3HG56○○J1

Conforms to ISO 3019-1

A3HG71-○

A3HG100-○

A3HG145-○

A3HG180-○

Shaft Extension
Conforming toISO Standards
KeyedSpline

4BoltsConnecting PortFrange/
Port CodeThread

E1/ E2

Metric-

U1

UnifiedAdapter

U2

BSPP-

J1

Rc

Adapter

Pipe Flange Thread
Frange/Port
Code

Easy replacement because of the conformance to international standards!

2BoltsThread

E1/ E2

Metric

U1

Unified

U2

MetricJ1

MetricApplication
Pressing Machine, Pipe-bending machine, Pipe Terminal Processing Machine, Tube Molding Machine, Steel Mill Equipment,Rolling Equipment, Concrete Production Equipment, Compactor, Industrial Machinery Equipment, Industrial Vehicle

Accessories

Speciﬁcations

High Pressure
Operated Pressure
MPa

Displacement
cm3/rev

Min. Adj.
Displacement
cm3/rev

A3HG1616.3

8.03600

A3HG3737.1

16.02700

A3HG56

56.3

35.0

A3HG71

70.7

45.0

A3HG100

100.5

63.0

2100

A3HG145

145.2

95.0

1800

A3HG180

180.7

125.0

1800

Rated

A3H series
Rated Pressure :28 MPaShaft Speedr/minModel number

Intermittent

Max.

Min.

A3HG series
Rated Pressure :31.5 MPa

2500
31.52300

35600

Rated Pressure is Improved!

Control Type■ Pressure Compensator Type
Output Flow→●When the system pressure increases and comes close 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.
Pressure→■ Pilot Pressure Control Type Pressure Compensator
Output Flow→●The pump is used in combination with the pilot relief valve or multistage pressure control valve.
By controlling the pilot pressure, the full cut-oﬀ pressure can be remote-controlled according toyour requirements.
Pressure→■ Constant Power Control Type With External Pilot
Output Flow→●This type of control can control the pump input power according to the motor output.
●When the system pressure increases, the output ﬂow decreases, in correspondence topredetermined shaft input values.
●This type of control can enable one pump to act as two pumps (low-pressure and large-ﬂow/Pressure→high-pressure and small-ﬂow). Therefore, the motor capacity can be reduced.
●This type of control provides the remote control of the full cut-oﬀ pressure by connecting a
remote control relief valve to the pilot port.

■ Load Sensing Type
Output Flow→●This is an energy-saving type control which maintains the pump ﬂow and load pressure at theabsolute minimum necessary level to operate the actuator.
●This type of control automatically regulates the output ﬂow so that the inlet-outlet diﬀerential
pressure of the ﬂow control valve at the output side is constant. To do so, the load pressure must
be introduced to the load sensing port of the pump through the external piping.

Pressure→●This type of control provides the remote control of the full cut-oﬀ pressure by connecting a
remote control relief valve to the pilot port.

Combination of Through Drive Pump
Shaft Extension:Splined High Torque Typedrive sidenondrive side
A3HG16A3 H G1 6

A3HG37

A3HG56A 3HG 71

A 3HG 100 A 3HG 145 A3HG 180

2 bol t4 bol t2 bol t4 bol t

○○○○

○○○○○

◎

○

◎

◎

◎

◎

◎

A3HG562bolt

○◎◎◎◎

◎

A3HG564bolt○○○○○○○○○○

◎◎

◎

○○

○

A3HG37A3HG71
A3HG100
A3HG145
A3HG180○◎The specification of the non-drive side pump can be used to the max operated pressure and max displacement.
○The specification of the non-drive side pump can be used within the allowable operated pressure and max displacement.

Distributor
International Sales Department

4-4-34, Kamitsuchidana-Naka, Ayase, Kanagawa Pref. 252-1113, Japan
Tel:+81-467-77-3111 Fax:+81-467-77-3115
E-mail: int.bd@yuken.co.jp
http://www.yuken.co.jp
June 2014: First edition
March 2018: Third edition

180310Ⓨ

drive side

non-drive side