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, 14/17 cm³
Charge pressure:
20 bar [290 psi]
Viscosity:
11 mm²/s [63 SUS]
Temperature:
80°C [176°F]
Charge pump power requirements
0
0
1.0
9.0
8.0
7.0
6.0
5.0
4.0
2.0
3.0
1
2
3
4
5
6
HP
kW
17 cm
3
[1.04 in
3
/rev]
14 cm
3
[0.85 in
3
/rev]
P003 336E
0
500
1500
1000
2000
Speed min
-1
(rpm)
3000
4000
2500
3500
Charge pump flow
0
1
3
6
9
12
15
18
10
20
30
40
50
60
US gal/min
l/min
17 cm
3
[1.04 in
3
/rev]
14 cm
3
[0.85 in
3
/rev]
P003 334E
0
500
1500
1000
2000
Speed min
-1
(rpm)
3000
4000
2500
3500
Technical Information
H1 Axial Piston Single Pumps, Size 069/078
Technical specifications
©
Danfoss | May 2017
11062169 | BC00000058en-US0801 | 9