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Power Transfer Units
Matched Positive Displacement Transfer Pumps with Hydraulic Motors

Materials of Construction
  • Cast Iron
  • Ductile Iron
Design Features

Viking Power Transfer Units (PTUs) are matched positive displacement fluid transfer pumps and hydraulic motors, mounted to a common foot bracket.  The positive displacement pumps are available in either external gear or internal gear designs.  They are excellent for mobile fluid transfer solutions, or remote, limited space or hazardous locations.

Performance
Capacity 0 - 7 m³/hr 0 - 30 GPM
Pressure 0 - 34 BAR 0 - 500 PSI
Viscosity 0.1 - 250,000 cSt 28 - 1,000,000 SSU
Temperature -40 - 230 C -40 - 450 F
Specifications

External Gear PTUs

1)  Select the pump size based on desired flow and speed, then determine required horsepower based on operating pressure.
2)  Refer to the motor selection chart and make a selection based on horsepower, available hydraulic fluid flow rate, and desired speed (RPM).

Pump Size

Nominal Capacity*

Required Horsepower at Rated Differential Pressure*

1150 RPM

1750 RPM

3450 RPM

at 1150 RPM

at 1750 RPM

at 3450 RPM

100 PSI

500 PSI

100 PSI

500 PSI

100 PSI

500 PSI

SG-0417

0.04

0.06

0.12

1/8

1/6

1/8

1/4

1/4

1/2

SG-0418

0.09

0.14

0.27

1/8

1/4

1/8

1/3

1/4

1/2

SG-0425

0.12

0.18

0.36

1/8

1/4

1/6

1/3

1/3

3/4

SG-0435

0.17

0.27

0.52

1/6

1/4

1/6

1/2

1/2

3/4

SG-0450

0.24

0.36

0.7

1/6

1/3

1/4

1/2

1/2

1

SG-0470

0.34

0.50

1.0

1/4

1/3

1/4

1/2

3/4

1

SG-0518

0.47

0.7

1.4

1/8

1/4

1/8

1/3

1/4

3/4

SG-0525

0.66

1.0

2.0

1/8

1/3

1/8

1/2

1/3

1

SG-0535

0.9

1.4

2.8

1/8

1/3

1/4

3/4

1/2

1-1/2

SG-0550

1.3

2.0

4.0

1/8

1/2

1/4

3/4

1/2

2

SG-0570

1.8

2.8

5.6

1/6

3/4

1/4

1

3/4

3

SG-0510

2.6

4.0

8.0

1/4

1

1/2

1-1/2

1

4

SG-0514

3.7

5.6

11.2

1/4

1-1/2

1/2

2

1-1/2

5

SG-0519

5.0

7.6

15.2

1/2

1-1/2**

3/4

2**

1-1/2

5**

SG-0528

7.3

11.2

22.4

1/2

1**

1

1-1/2**

2

4**

 * All Values Shown are for 100 SSU Oil

** Max. Differential Pressure for SG-0519 is 400 PSI and for SG-0528 is 200 PSI.

Motor Size

Nominal Motor

Differential Pressure Required [PSI]

Capacity

Speed

Motor Horsepower

GPM

RPM

1/4

1/3

1/2

3/4

1

1-1/2

2

3

5

FM-0518

1.4

3450

650

825

1250

--

--

--

--

--

--

0.7

1750

1050

1450

2100

--

--

--

--

--

--

0.5

1150

1600

2250

--

--

--

--

--

--

--

FM-0525

2.0

3450

450

525

650

850

1050

1450

1850

2800

--

1.0

1750

550

700

975

1400

1800

2650

--

--

--

0.7

1150

750

950

1375

2050

2750

--

--

--

--

FM-0535

2.8

3450

350

400

500

650

800

1100

1400

2000

--

1.4

1750

425

500

700

1000

1300

1900

2500

--

--

0.9

1150

550

700

1000

1475

1950

2850

--

--

--

FM-0550

4.0

3450

300

350

425

525

625

825

1050

1450

2300

2.0

1750

350

425

550

750

950

1325

1725

2600

--

1.3

1150

400

500

725

1050

1375

2000

2700

--

--

FM-0570

5.6

3450

225

250

300

375

450

600

725

1000

1600

2.8

1750

250

300

375

500

650

950

1200

1800

--

1.8

1150

300

375

500

725

950

1375

1800

--

--

FM-0510

8.0

3450

175

200

250

300

350

450

550

750

1150

4.0

1750

200

225

300

375

475

675

875

1275

--

2.6

1150

225

275

350

500

625

975

1250

--

--

FM-0514

11.2

3450

160

175

200

240

275

350

430

590

875

5.6

1750

160

185

225

300

370

510

650

940

--

3.7

1150

175

210

280

400

500

725

950

--

--

 

Internal Gear PTUs

One hydraulic motor (Model FM-0741) is used on Series 75 (lipsealed) and 475 (mechanically sealed) internal gear Power Transfer Units as standard (other motors available).  Select pump based on desired flow rate and operating pressure.  This will determine the required pressure differential and flow rate for the hydraulic motor.

Pump Size

Pump Differential Pressure

1150 RPM

1750 RPM

Nominal Pump Capacity

Hydraulic Motor

Nominal Pump Capacity

Hydraulic Motor

Differential Pressure Required

Hydraulic Fluid Flow Required

Differential Pressure Required

Hydraulic Fluid Flow Required

PSI

GPM

PSI

GPM

GPM

PSI

GPM

G75 &

G475

25

5

250

2.8

7

275

4.2

50

325

2.9

350

4.2

75

425

2.9

450

4.2

100

550

3.0

575

4.2

GG75 & 

GG475

25

7

275

2.8

10

275

4.2

50

375

2.9

375

4.2

75

475

3.0

500

4.2

100

600

3.0

625

4.2

H75 &

H475

25

10

300

2.8

15

300

4.2

50

475

3.0

500

4.2

75

700

3.0

700

4.2

100

825

3.0

900

4.3

HJ75 &

HJ475

25

13

475

3.0

20

500

4.2

50

700

3.0

725

4.3

75

900

3.0

950

4.3

100

1200

3.1

1225

4.4

HL75 &

HL475

25

20

500

3.0

30

550

4.2

50

750

3.0

775

4.3

75

1100

3.0

1150

4.3

100

1350

3.2

1400

4.5

Literature

For Power Transfer Unit literature, please contact us.

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