Danfoss 45 G Frame Pumps User guide
MAKING MODERN LIVING POSSIBLE
Technical Information
Series 45
G Frame
powersolutions.danfoss.com
Technical Information Series 45 G Frame Pumps
Contents
Frame G
Design ........................................................................................................................................................................................... 4
Specifications ............................................................................................................................................................................. 5
Performance G74B .................................................................................................................................................................... 6
Performance G90C ................................................................................................................................................................... 7
Order code ................................................................................................................................................................................... 8
Controls....................................................................................................................................................................................... 10
Pressure compensated control (PC) ........................................................................................................................... 10
Remote PC control (RP) ................................................................................................................................................... 10
Load sensing control (LS) ............................................................................................................................................... 11
Load sensing control with internal bleed orifice (LB) .......................................................................................... 11
Input shafts ............................................................................................................................................................................... 12
Auxiliary mounting pads ...................................................................................................................................................... 13
SAE-A auxiliary mounting pad ..................................................................................................................................... 13
SAE-B auxiliary mounting pad ..................................................................................................................................... 13
Displacement limiter.............................................................................................................................................................. 14
SAE-C auxiliary mounting pad ..................................................................................................................................... 14
Installation drawings ............................................................................................................................................................. 15
Running cover .................................................................................................................................................................... 15
Adjustable displacement limiter ................................................................................................................................. 15
Axial ported endcap ........................................................................................................................................................ 16
Radial ported endcap ...................................................................................................................................................... 18
11058670 • Rev BA • Sep 20132
Technical Information Series 45 G Frame Pumps
This information was removed from:
Series 45 Axial Piston Open Circuit Pumps Technical Information Manual 520L0519
Rev E November 2006
For more information regarding the Series 45 product line refer to the current version of 520L0519.
11058670 • Rev BA • Sep 2013 3
Technical Information Series 45 G Frame Pumps
T
Design
Series 45 Frame G pumps have a dual servo piston design with a cradle-type swashplate set in
polymer-coated journal bearings. The bias piston increases swashplate angle. The displacement
piston decreases swashplate angle. At equal pressure, the larger diameter displacement piston
overpowers the bias piston. Nine reciprocating pistons displace fluid from the pump inlet to the
pump outlet as the cylinder block rotates on the pump input shaft. The block spring holds the piston
slippers to the swashplate via the slipper retainer. The cylinder block rides on a bi-metal valve plate
optimized for high volumetric efficiency and low noise. Tapered roller bearings support the input
shaft and a viton lip-seal protects against shaft leaks.
An adjustable one spool (PC only, not shown) or two spool (LS) control senses system pressure and
load pressure (LS controls). The control ports system pressure to the displacement piston to control
pump output flow.
Frame G cross section
LS control
(attached to endcap)
LS spool
PC spool
LS adjustment
PC adjustment
Displacement piston
Swashplate
Cylinder
block
Valve
plate
Cylinder
block
spring
apered
roller
bearing
Bias piston guide
Bias spring
Bias piston
Slipper retainer
Tapered roller
bearing
Shaft seal
Input shaft
Slipper
Piston
P104 002E
11058670 • Rev BA • Sep 20134
Technical Information Series 45 G Frame Pumps
Specifications
For general operating
parameters, including fluid
viscosity, temperature, and
inlet and case pressures,
see page 13. For system design
parameters, including
installation, filtration,
reservoir, and line velocities,
see page 15.
For definitions of pressure and
speed ratings, see page 14. For
more information on external
shaft loads, see page 16;
mounting flange loads,
see page 17.
Features and options
Feature Unit G74B G90C
Maximum Displacement cm³ [in³] 74 [4.52] 90 [5.49]
Flow at rated speed (theoretical) l/min
Input torque at maximum
displacement (theoretical)
Mass moment of inertia of internal
rotating components
Weight Axial ports kg [lb] 29 [63]
Radial ports 36 [80]
Rotation Clockwise, Counterclockwise
Mounting SAE-C
Auxiliary mounting (See page 74 ) SAE-A, SAE-B, SAE-BB, SAE-C
System ports (type) 4-bolt split flange
System ports (location) Axial, Radial
Control types (See page 71) PC, Remote PC, LS, LS with internal bleed
Shafts (See page 73) Splined 14 tooth, 17 tooth
Displacement limiters (See page 75 ) Optional, adjustable
[US gal/min]
N•m/bar
[lbf•in/1000 psi]
kg•m²
[slug•ft²]
Straight Ø 31.75 mm [1.25 in]
177.6
[46.9]
1.178
[719]
0.00630
[0.00465]
Ratings
Rating Units G74B G90C
Input speed
Working pressure continuous bar [psi] 310 [4 495] 260 [3770]
External shaft
loads
Bearing life at 140 bar [2030 psi] B10 hours 41 383 19 847
Mounting flange
load moments
1. Input speeds are valid at 1 bar absolute [0 in Hg vac] inlet pressure. See Inlet p ressure vs. speed charts.
1
minimum min-1 (rpm) 500 500
continuous 2400 2200
maximum 2800 2600
maximum 400 [5800] 350 [5075]
External moment (Me) N•m [lbf•in] 300 [2655]
Thrust in (Tin), out (T
at 210 bar [3045 psi] 9048 4339
at 260 bar [3770 psi] 4062 194 8
at 310 bar [4495 psi] 2101 —
Vibratory (continuous) N•m [lbf•in] 1580 [14 000]
Shock (max) 5650 [50 000]
) N [lbf] 2900 [650]
out
Model
198
[52.3]
1.432
[874]
0.00650
[0.00480]
Model
For more information on noise
levels, see page 19.
Sound levels
dB(A) 210 bar [3045 psi] 260 bar [3770 psi] 310 bar [4495 psi]
Model 1800 mi n-1(rpm) Rated speed 1800 min-1(rpm) Rated speed 1800 min-1(rpm) Rated speed
G74B 75 78 74 76 75 77
C90C 74 76 75 77 — —
2. S ound data was collec ted in a semi-anechoic chamber. Values have b een adjusted (-3 dB) to refle ct anechoic levels.
11058670 • Rev BA • Sep 2013 5
2
Technical Information Series 45 G Frame Pumps
Performance
G74B
Flow and power data valid at
49°C [120°F] and viscosity of
17.8 mm²/sec [88 SUS].
Flow vs. speed
200
160
120
80
Flow (l/min)
40
Input power vs. speed
100
80
60
40
Power (kW)
20
0
0 500 1000 1500 2000 2500
Speed min(rpm)
-1
260 bar [3770 psi]
210 bar [3045 psi]
140 bar [2030 psi]
P104 004E
50
40
30
20
Flow (US gal/min)
10
0
120
100
80
60
Power (hp)
40
20
The chart on the right shows
allowable inlet pressure and
speed at various
displacements. Greater speeds
and lower inlet pressures are
possible at reduced
displacement. Operating
outside of acceptable limits
reduces pump life.
0
Inlet pressure vs. speed
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Inlet Pressure (bar abs)
0.7
0.6
0 500 1000 1500 2000 2500
Speed min(rpm)
2000 2200 2400 2600 2800 3000
Shaft Speed min(rpm)
-1
100% 90%80%
-1
P104 005E
P104 015E
0
8
6
4
2
0
3
6
9
(psi gauge)
ac)
(in Hg v
11058670 • Rev BA • Sep 20136
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