Danfoss 51 Series Service Manual

System pressure range
bar psi
Maximum delta pressure 480 7000
Minimum low pressure side 10 145
Speed limits
Frame size
Speed min
-1
[rpm] 060 080 110 160 250
Rated speed at maximum displacement 3,600 3,100 2,800 2,500 2,200
at minimum displacement 5,600 5,000 4,500 4,000 3,400
Maximum speed
1
at maximum displacement 4,400 4,000 3,600 3,200 2,700
at minimum displacement 7,000 6,250 5,600 5,000 4,250
1
Contact your Danfoss representative for maximum speed at displacements between maximum and minimum displacement.
Theoretical torque
Frame size
Displacement condition 060 080 110 160 250
at maximum
displacement
N•m/bar
[lbf•in/1000 psi]
0.95
583
1.28
784
1.75
1067
2.56
1563
3.98
2428
at minimum
displacement
N•m/bar
[lbf•in/1000 psi]
0.19
117
0.26
156
0.35
214
0.51
313
0.80
486
Fluid specifications
Temperature range
1
Calefaction °C °F
Intermittent (cold start) - 40 - 40
Continuous 104 220
Intermittent 115 240
1
At the hottest point, usually the case drain port.
Viscosity
mm
2
/s SUS
Minimum (intermittent) 7 47
Recommended operating range 12-60 70-278
Maximum (cold start) 1,600 7,500
Fluid cleanliness
Cleanliness level and βx-ratio
Required fluid cleanliness level ISO 4406 Class 18/13
Recommended βx-ratio for suction filtration β
35-45
=75 (β
10
≥2)
Recommended βx-ratio for charge pressure filtration β
15-20
=75 (β
10
≥10)
Recommended inlet screen size for charge pressure filtration 100 µm - 125 µm
Service Manual
Series 51 and 51-1 Motors
Technical specifications
22 |
©
Danfoss | March 2016 11008567 | AX00000013en-US0202

Danfoss 51 Series Specifications

General

Brand	Danfoss
Model	51 Series
Category	Engine
Language	English