Helm Tower HA4VG Series 32 Axial Piston Variable Pump HA4VG28 HA4VG56 HA4VG40 HA4VG71 HA4VG90 HA4VG125 HA4VG180

Name

A4VG Series Axial piston variable pump

Series

Series 32

Sizes

28 40 56 71 90 125 180 250

Nominal Pressure

400 bar

Maximum Pressure

450 bar

Operation Mode

Closed Circuit

Size

NG

28

40

56

71

90

125

180

250

Displacement
variable pump

Vg max

cm³

28

40

56

71

90

125

180

250

boost pump (at p = 20 bar)

Vg Sp

cm³

6.1

8.6

11.6

19.6

19.6

28.3

39.8

52.5

Speed1)

maximum at Vg max

nnom

rpm

4250

4000

3600

3300

3050

2850

2500

2400

limited maximum²)

nmax

rpm

4500

4200

3900

3600

3300

3250

2900

2600

intermittent maximum³)

nmax

rpm

5000

5000

4500

4100

3800

3450

3000

2700

minimum

nmin

rpm

500

500

500

500

500

500

500

500

Flow at nnom and Vg max

qv

L/min

119

160

202

234

275

356

450

600

Power4)
at nnom, Vg max and

Dp = 400 bar

P

kW

79

107

134

156

183

238

300

400

Torqu4)
at Vg max and

Dp = 400 bar

T

Nm

178

255

357

452

573

796

1146

1592

Dp = 100 bar

T

Nm

45

64

89

113

143

199

286

398

Rotary stiffness drive shaft

S

c

kNm/rad

31.4

69

80.8

98.8

158.1

218.3

244.5

354.5

T

c

kNm/rad

–

–

95

120.9

–

252.1

318.4

534.3

A

c

kNm/rad

–

79.6

95.8

142.4

176.8

256.5

–

–

Z

c

kNm/rad

32.8

67.5

78.8

122.8

137

223.7

319.6

624.2

U

c

kNm/rad

–

50.8

–

–

107.6

–

–

–

Moment of inertia for rotary group

JGR

kgm²

0.0022

0.0038

0.0066

0.0097

0.0149

0.0232

0.0444

0.0983

Maximum angular acceleration5)

a

rad/s2

38000

30000

24000

21000

18000

14000

11000

6700

Case volume

V

L

0.9

1.1

1.5

1.3

1.5

2.1

3.1

6.3

Mass approx. (without through drive)

m

kg

29

31

38

50

60

80

101

156

Center of gravity6)

X

mm

< 5

< 5

< 5

< 5

< 5

< 5

< 5

< 5

Y

mm

24

20

20

15

20

30

33

30

Z

mm

105

112

106

135

145

160

180

203