Midland SPD-6 - Page 256

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256
Model SPD-6
Fluid specifications
Fluid specifications
Features Unit
Viscosity Minimum
mm
2
/s
[SUS]
7 [49]
Recommended range
12-80 [66-366]
Maximum
1600 [7416]
Temperature range
1)
;
2)
Minimum
°C
[°F]
-40 [-40]
Rated
104 [220]
Maximum intermittent
115 [240]
Filtration
(recommended minimum)
Cleanliness per ISO 4406
-
22/18/13
Efficiency (charge pressure filtration)
β-ratio β
15-20
= 75 (β
10
≥ 10)
Efficiency (suction and 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 sizes
Metric system Inch system
Where: SI units [US units]
V
g
p
high
p
low
∆p
n
η
v
η
mh
η
t
=
=
=
=
=
=
=
=
Motor displacement per rev.
High pressure
Low pressure
p
high
– p
low
Speed
Motor volumetric efficiency
Mechanical mechanical-hydraulic efficiency
Motor total efficiency (η
v
• η
mh
)
cm
3
/rev [in
3
/rev]
bar [psi]
bar [psi]
bar [psi]
min
-1
(rpm)
Service Manual H1B 060/080/110/160/250 Bent Axis Motors
Technical specifications
20 11024924 • Rev CB • February 2015