Charge pump
Charge Pump Selection
In most applications a general guideline is that the charge pump displacement should be at least 10% of
the total displacement of all components in the system. Unusual application conditions may require a
more detailed review of charge flow requirements. System features and conditions which may invalidate
the 10% guideline include (but are not limited to):
•
Continuous operation at low input speeds < 1500 min
-1
(rpm)
•
High shock loading and/or long loop lines
•
High flushing flow requirements
•
Multiple low speed high torque motors
•
High input shaft speeds
Contact your Danfoss representative for application assistance if your application includes any of these
conditions.
Charge pump flow and power curves, 12 cm³
Charge pressure: 20 bar [290 psi]
Viscosity: 11 mm²/s [63 SUS]
Temperature: 80°C [176°F]
Charge pump flow
0
0
1
3
6
9
12
14
10
20
30
40
50
0
500
1000 1500 2000
2500
3000
3500
4000
Speed min
-1
(rpm)
l/min
US gal/min
12 cm
3
[0.73 in
3
/rev]
P003 368E
Charge pump power requirements
0.5
1.0
1.0
2.0
3.0
4.0
5.0
1.5
2.5
3.5
2.0
3.0
Kw
HP
P003 369E
12 cm
3
[0.73 in
3
/rev]
0
0
0
500
1000 1500 2000
2500
3000
3500
4000
Speed min
-1
(rpm)
Technical Information
H1 Axial Piston Single Pumps, Size 045/053
Technical specifications
©
Danfoss | May 2017
11063344 | BC00000059en-US1001 | 9
