Danfoss shhark User guide
Technical Information
shhark® Low Noise Gear Pumps
Group 2
www.danfoss.com
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
Revision history |
Table of revisions |
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Date |
Changed |
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July 2021 |
Sound level graphs added |
0201 |
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February 2020 |
Added frame size 025 sound levels graphs |
0105 |
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November 2019 |
Minor edits to text, tables and the diagrams in "Dimensions and Data" |
0104 |
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October 2019 |
Features text change on page 6. |
0103 |
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October 2019 |
New images replacement. |
0102 |
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September 2019 |
First edition. |
0101 |
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2 | © Danfoss | July 2021 |
BC315962412551en-000201 |
Technical Information |
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shhark® Low Noise Aluminum Gear Pumps, Group 2 |
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Contents |
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General information |
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The shhark® Low Noise Technology.......................................................................................................................................... |
4 |
Features and Benefits...................................................................................................................................................................... |
5 |
shhark® Gear Pumps Representatives....................................................................................................................................... |
5 |
Advantages of the shhark® technology versus the “dual contact flank” technology.............................................. |
6 |
shhark® Pump Design..................................................................................................................................................................... |
6 |
shhark® Technical Data................................................................................................................................................................... |
7 |
Determination of Nominal Pump Sizes.................................................................................................................................... |
8 |
Master Model Code |
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Model Code for Single Gear Pumps........................................................................................................................................ |
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Model Code for Tandem Gear Pumps.................................................................................................................................... |
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Model Code for Tandem Gear Pumps.................................................................................................................................... |
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System Requirements |
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Inlet Pressure................................................................................................................................................................................... |
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Speed.................................................................................................................................................................................................. |
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Hydraulic Fluids.............................................................................................................................................................................. |
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Temperature and viscosity......................................................................................................................................................... |
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Filtration............................................................................................................................................................................................ |
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Filters............................................................................................................................................................................................. |
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Selecting a filter......................................................................................................................................................................... |
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Reservoir...................................................................................................................................................................................... |
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Line sizing......................................................................................................................................................................................... |
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Pump Drive....................................................................................................................................................................................... |
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Pump Life.......................................................................................................................................................................................... |
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Sound Level...................................................................................................................................................................................... |
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Sound Level Graph |
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Pump Performance Graphs |
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Performance Graphs for Frame Size 8,0 and 011................................................................................................................ |
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Performance Graphs for Frame Size 014 and 017.............................................................................................................. |
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Performance Graphs for Frame Size 019, 022 and 025..................................................................................................... |
24 |
Product Options |
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Standard Flange, Shaft and Ports Configuration Overview............................................................................................ |
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Shaft Options................................................................................................................................................................................... |
26 |
Pumps with integral relief valve • internally and externally drained........................................................................... |
27 |
Integral relief valve covers E10 or I10..................................................................................................................................... |
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Model Codes for Integral Relief Valve..................................................................................................................................... |
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Dimensions and Data |
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SHP2 with E10-T80 flange-drive gear combination.......................................................................................................... |
30 |
SHP2 with B10-T50 flange-drive gear combination.......................................................................................................... |
31 |
SHP2 with D10-I10 flange-drive gear combination........................................................................................................... |
32 |
SHP2 with B20/B22 - T50 flange-drive gear combination............................................................................................... |
33 |
SHP2 with SA1 - S09/S11/PS1 flange-drive gear combination...................................................................................... |
34 |
© Danfoss | July 2021 |
BC315962412551en-000201 | 3 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
General information
The shhark® Low Noise Technology
The standard technology currently used in low noise gear pumps is based on double-flank contact. This solution reduces the peak-to-peak flow pulsation by 75% compared to a single-flank contact gear pumps with the same number of teeth.
The Danfoss shhark® achieves the same reduction of flow pulsation, but in a totally different way. As illustrated below, for the same outer diameter, shhark® gears feature almost twice the number of teeth of a standard gear pump, thanks to a revolutionary asymmetric tooth profile design. Moreover, the shhark® teeth are also slightly helical; the small helix angle does not generate any additional radial and axial load but makes the flow characteristic smoother, further reducing the flow pulsation.
Standard gear pump (11-teeth) versus shhark® (17-teeth) technology
The comparison between the flow characteristic of Danfoss SKP2 (11-teeth) and shhark® (17-teeth) is illustrated in the plot below: the reduction of peak-to-peak flow pulsation is 78%. In addition, the average flow per unit width of shhark® is approximately 2.7% higher than SKP2; this means that for the exact same pump dimensions, shhark® delivers more flow.
Flow characteristics of shhark® vs SKP2 standard
4 | © Danfoss | July 2021 |
BC315962412551en-000201 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
General information
Features and Benefits
•Noise level emissions reduced up to 10 dB(A)
•Low noise performance guaranteed throughout the whole life of the pump
•Low vibration, flow pulsation reduced by a stunning 78% compared to a standard gear pump
•Higher volumetric efficiency than a standard gear pump by 2%
•Noise emitted at low frequency, resulting in high sound quality
•Wide range of displacements from 6.18 to 29 cm3/rev
•Rated pressure up to 250 bar
•Operating speed up to 4000 rpm
•SAE, DIN and European standard mounting flanges and shafts
•Available with integral relief valve
•Interchangeable with all standard gear pumps
•Multiple pump configurations, available also in compact configuration
•Compact and lightweight
•Internal spline available, which means compactness and availability of big displacements working at high pressure simultaneously (maximum 120 Nm at the intermediate coupling)
•Helps to meet legal NVH requirements
•Innovative solution (Danfoss Patents US 20150330387 (A1) and WO2017064046 (A1)
•Ideal for hybrid and full electric machines for which the hydraulic pump is the most important source of noise together with fan drive
•Cost and space saving due to elimination of end-of-line noise reduction measures
shhark® Gear Pumps Representatives
Many combinations of the gear pumps are available as multiple units made to fit any need.
SHP2 - SA1-S09 |
SHP2 - D10-I10 |
SHP2 - E10-T80 |
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© Danfoss | July 2021 |
BC315962412551en-000201 | 5 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
General information
Advantages of the shhark® technology versus the “dual contact flank” technology
The effectiveness of dual contact flank is very likely to decrease throughout the pump’s life, because external gear units often work at high pressure with high level of contaminants in the hydraulic fluid.
In such conditions, the critical components of the rotating kit slowly wear out, with a progressive loss of the double-flank contact condition and with it, the low noise performance.
shhark®pumps are able to keep low noise performance even after thousands of hours of heavy duty operation in the field and it even slightly improve, due to the tribologic adaptation of components, while in the same conditions the dual contact flank pump starts emitting noise due to gears wearing. In addition, shhark® emits noise at lower frequency than the dual contact flank technology, resulting in a better sound quality.
shhark® Pump Design
In terms of rated operating range (speed, pressure and temperature), overall dimensions and available configurations, the shhark® has been designed to be essentially a low noise version of SKP2 pump.
The 20 mm shaft can accommodate any type of drive end, such as:
•S09 (SAE 9-teeth 16/32)
•S11 (SAE 11-teeth 16/32)
•S13 (SAE 13-teeth 16/32)
•T50 (Taper 1:5)
•T80 (Taper 1:8)
•PS1(Parallel SAE Ø15.875)
•I10 (Tang 8x17.8)
As for SKP2, the hydrostatic compensation system is on the bearing blocks to ensure high efficiency, more compact tandem combinations and higher flexibility to distributors.
SHP2 - SA1-S11 cutaway view
6 | © Danfoss | July 2021 |
BC315962412551en-000201 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
General information
shhark® Technical Data
The table below details the technical data for shhark® gear pumps based on the model and displacement configuration.
Technical data for SHP2
Feature |
Unit |
Frame size |
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6.0 |
8.0 |
011 |
014 |
017 |
019 |
022 |
025 |
028 |
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Displacement |
cm3/rev |
6.18 [0.37] |
8.7 |
11.1 |
14.8 |
17.3 |
19.8 |
23.5 |
25.94 |
29 [1.75] |
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[in3/rev] |
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[0.53] |
[0.68] |
[0.90] |
[1.06] |
[1.21] |
[1.43] |
[1.58] |
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Peak pressure |
bar |
280 |
280 |
280 |
280 |
280 |
260 |
230 |
200 |
190 [2755] |
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[psi] |
[4060] |
[4060] |
[4060] |
[4060] |
[4060] |
[3770] |
[3335] |
[2900] |
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Rated pressure |
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250 |
250 |
250 |
250 |
250 |
240 |
210 |
190 |
180 [2610] |
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[3625] |
[3625] |
[3625] |
[3625] |
[3625] |
[3480] |
[3045] |
[2755] |
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Minimum speed at |
min-1(rpm) |
600 |
600 |
500 |
500 |
500 |
500 |
500 |
500 |
500 |
0-100 bar |
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Minimum speed at |
min-1(rpm) |
1200 |
1000 |
800 |
750 |
750 |
700 |
700 |
700 |
600 |
100-180 bar |
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Minimum speed at 180 |
min-1(rpm) |
1400 |
1400 |
1200 |
1000 |
1000 |
1000 |
800 |
800 |
700 |
bar to rated pressure |
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Maximum speed |
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4000 |
4000 |
4000 |
3500 |
3000 |
3000 |
3000 |
3000 |
2500 |
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Weight |
kg [lb] |
2.4 [5.3] |
2.5 [5.5] |
2.7 [5.5] |
2.9 [6.3] |
3.0 [6.5] |
3.1 [6.7] |
3.2 [7.0] |
3.4 [7.5] |
3.4 [7.5] |
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Moment of inertia of |
x 10-6 |
27.6 [629] |
32.4 |
38.4 |
47.3 |
53.3 |
59.2 |
68.1 |
71.1 |
77.6 |
rotating components |
kg•m2 |
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[769] |
[911] |
[1122] |
[1265] |
[1405] |
[1616] |
[1687] |
[1827] |
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[-6 lb•ft2] |
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Theoretical flow at |
l/min [US |
24.72 [6.4] |
34.8 |
44.4 |
51.8 |
51.9 |
59.4 |
70.5 |
77.8 |
116.36 |
maximum speed |
gal/min] |
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[9.2] |
[11.7] |
[13.7] |
[13.7] |
[15.7] |
[18.6] |
[20.6] |
[30.2] |
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1 kg•m2 = 23.68 lb•ft2
C Caution
The rated and peak pressure mentioned in the table are for pumps with flanged ports only. When threaded ports are required a de-rated performance has to be considered. To verify the compliance of a high pressure application with a threaded ports pump apply to a Danfoss representative.
© Danfoss | July 2021 |
BC315962412551en-000201 | 7 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
General information
Determination of Nominal Pump Sizes
Generally, the sizing process is initiated by an evaluation of the machine system to perform the necessary work function. The following formulae can be used to determine the nominal pump size for a specific application.
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Metric System |
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Inch System |
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Output flow |
Qe = |
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Vg • n • ηv |
(l/min) |
Qe = |
Vg • n • ηv |
(US gal/min) |
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1000 |
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231 |
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Input torque |
Me = |
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Vg • p |
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(N•m) |
Me = |
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Vg • p |
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(lbf•in) |
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20 • π • ηm |
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2 • π • ηm |
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Input power |
Pe = |
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Me • n • p |
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Qe • p |
(kW) |
Pe = |
Me• n • p |
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Qe • p |
(hp) |
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30 000 |
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198 000 |
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600 • ηt |
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1714 • ηt |
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Variables: |
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SI units [US units]: |
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Vg = Displacement per rev. |
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cm3/rev [in3/rev] |
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pHP = High pressure |
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bar [psi] |
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pNP = Low pressure |
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bar [psi] |
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∆p = pHP – pNP |
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bar [psi] |
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n = Input speed |
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min-1 (rpm) |
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ηv = Volumetric efficiency
ηm = Mechanical (torque) efficiency ηt = Overall efficiency (ηv • ηm)
8 | © Danfoss | July 2021 |
BC315962412551en-000201 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
Master Model Code
Model Code for Single Gear Pumps
A |
B |
C |
D |
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E |
F |
G |
H |
I |
J |
K |
L |
M |
N |
O |
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SHP2 |
• |
• |
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• |
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• |
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A – Family
SHP2 |
Low-noise Group 2 gear pump |
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B – Frame size and Displacement
6,0 |
6.18 cm3* |
8,0 |
8.7 cm3 |
011 |
11.1 cm3 |
014 |
14.8 cm3 |
017 |
17.3 cm3 |
019 |
19.8 cm3 |
022 |
23.5 cm3 |
02525.94cm3
*Frame size 028 is available upon a request.
C – Direction of Rotation
L |
Left hand (Counter-clockwise) |
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R |
Right hand (Clockwise) |
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D – Mounting flange
B10 |
Pilot Ø80 mm; 4 holes |
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B20 |
Pilot Ø50 mm; 2 holes through body |
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B21 |
Pilot Ø50 mm; 2 holes through body; Seal on pilot |
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B22 |
Pilot Ø50 mm; 2 holes through body |
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D10 |
Pilot Ø52 mm; O-ring; 4 holes through body |
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E10 |
Pilot Ø36.5 mm; 4 holes |
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SA1 |
SAE A pilot Ø82.55 mm; 2 holes |
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SA2 |
SAE A pilot Ø82.55 mm; 2 holes; Seal on pilot |
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SB1 |
SAE B pilot Ø101.6 mm; 2 holes |
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© Danfoss | July 2021 |
BC315962412551en-000201 | 9 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
Master Model Code
Model Code for Single Gear Pumps
A |
B |
C |
D |
E |
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F |
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G |
H |
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I |
J |
K |
L |
M |
N |
O |
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SHP2 |
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• |
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• |
• |
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• |
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E – Shaft type
T50 |
Taper 1:5; M12x1.25 with Key 3 |
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T80 |
Taper 1:8; M12x1.25 with Key 4 |
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I10 |
Tang 8 x Ø17.8 x 6.5 |
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PS1 |
Parallel SAE Ø15.875 x 23.8; Key 4x18 |
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S09 |
Spline SAE J498-9T-16/32DP |
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S11 |
Spline SAE J498-11T-16/32DP |
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S13 |
Spline SAE J498-13T-16/32DP |
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F – Inlet and G – Outlet ports dimensions
F – Inlet and G – Outlet ports dimensions
Code |
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Dimensions |
Ports |
Code |
Thread Dimensions |
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B5 |
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15x35xM6 |
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D5 |
M18x1.5 |
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B6 |
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15x40xM6 |
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D7 |
M22x1.5 |
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B7 |
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20x40xM6 |
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E4 |
3/4-16UNF |
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C3 |
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13.5x30xM6 |
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E5 |
7/8-14UNF |
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C5 |
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13.5x40xM8 |
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E6 |
11/16-12UN |
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C7 |
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20x40xM8 |
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F3 |
3/8 Gas |
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MB |
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12 x 38.1 x 17.48 x M8 (=) |
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F4 |
1/2 Gas |
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MC |
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18.5 x 47.63 x 22.23 x M6 (=) |
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F5 |
3/4 Gas |
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MD |
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18.5 x 47.63 x 22.23 x M8 (=) |
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F6 |
1 Gas |
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ME |
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18.5 x 47.63 x 22.23 x M10 (=) |
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H5 |
M18 x 1.5 per ISO6149 |
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MG |
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25/20 x 52.37 x 26.19 x M10 (=) |
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H7 |
M22 x 1.5 per ISO6149 |
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NN |
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Without outlet port |
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H8 |
M27 x 2 per ISO6149 |
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H9 |
M33 x 2 per ISO6149 |
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To be used with rear ported units only. |
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H - Rear cover
P10 |
Standard cover for pump |
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I10 |
Rear cover for pump with relief valve with internal drain |
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E10 |
Rear cover for pump with relief valve with external drain 3/8 Gas |
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10 | © Danfoss | July 2021 |
BC315962412551en-000201 |
Technical Information
shhark® Low Noise Aluminum Gear Pumps, Group 2
Master Model Code
Model Code for Single Gear Pumps
A |
B |
C |
D |
E |
F |
G |
H |
I |
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J |
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K |
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L |
M |
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N |
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O |
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SHP2 |
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• |
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• |
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• |
• |
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• |
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• |
• |
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I – Shaft seal
V Viton
J – Sealing
N NBR
K – Screws
N |
Standard burnished screws |
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AZinc plated screws
BGeomet screws
L – Valve setting
NNN |
No valve |
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V** |
Integral relief valve pressure setting |
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M – Marking type
N |
Standard Danfoss marking |
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A |
Standard Danfoss marking + Customer code |
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|
Z |
No marking |
|
|
N – Mark position
N |
Standard marking on the top |
|
|
A |
Special marking position at the bottom |
|
|
O – Special features
0000 |
No special features |
|
|
© Danfoss | July 2021 |
BC315962412551en-000201 | 11 |
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