Fluid specifications
Fluid specifications
Features
Unit
All sizes
Viscosity
Minimum intermittent
mm
2
/s
[SUS]
7 [49]
Recommended range
12-80 [66-366]
Maximum intermittent
1600 [7416]
Temperature range
1)2)
Minimum
°C
[°F]
-40 [-40]
Rated
104 [220]
Maximum intermittent
115 [240]
Cleanliness and Filtration
Required cleanliness per ISO 4406
-
22/18/13
Efficiency (charge pressure filtration)
β-ratio
β
15-20
= 75 (β
10
≥ 10)
Efficiency (suction / return line filtration)
β
35-45
= 75 (β
10
≥ 2)
Recommended inlet screen mesh size
µm
100 – 125
1)
At the hottest point, normally case drain port.
2)
Minimum: cold start, short term t<3 min, p<50 bar, n<1000 rpm.
Determination of nominal motor size
Based on SI units
Based on US units
V
g
• n
1000 •
v
Q
e
=
V
g
• p •
mh
20 •
M
e
=
Q
e
• p •
t
600
=
M
e
• n
9550
P
e
=
n = Q
e
• 1000 •
v
V
g
V
g
• n
231 •
v
Q
e
=
V
g
• p •
mh
2 •
M
e
=
V
g
• n • p •
t
396 000
P
e
=
n = Q
e
• 231 •
v
V
g
Where:
Q
e
Input flow (l/min)
M
e
Output torque (N•m)
P
e
Output power (kW)
n
Speed (min
-1
)
V
g
Motor displacement per rev. (cm
3
/rev)
p
high
High pressure (bar)
p
low
Low pressure (bar)
∆p
High pressure minus Low pressure (bar)
η
v
Motor volumetric efficiency
η
mh
Mechanical-hydraulic efficiency
η
t
Motor total efficiency (η
v
• η
mh
)
Where:
Q
e
Input flow [US gal/min]
M
e
Output torque [lb•in]
P
e
Output power [hp]
n
Speed [rpm]
V
g
Motor displacement per rev. [in
3
/rev]
p
high
High pressure [psi]
p
low
Low pressure [psi]
∆p
High pressure minus Low pressure [psi]
η
v
Motor volumetric efficiency
η
mh
Mechanical-hydraulic efficiency
η
t
Motor total efficiency (η
v
• η
mh
)
Service Manual
H1F Bent Axis Fixed Displacement Motors, Size 080
Technical specifications
©
Danfoss | December 2023
AX465363259664en-000102 | 13