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Gear Pumps

Technical Information

Group 1

Gear Pumps Group 1

2

Copyright 1988, 1989, 1990, 1991, 1994, 1997, 1998, 1999 Sauer-Sundstrand Company.All rights reserved. Contents subject to change. All trademarks property of their respective owners.

Group 1 Family of Gear Pumps

SAUER-SUNDSTRAND High performance gearpumps are fixed displacement pumps which consist ofthe pump housing, drive gear, driven gear, DU bush-ings, rear cover and front flange, shaft seal, and inner/ outer seals. The pressure balanced design of thepumps provides high efficiency for the entire series.

The standard SNP 1 pumps are offered through-out the given range of displacements. There arealso one special versions, the SKP 1. The SKP 1is designed to accommodate an SAE 9T 20/40 DPtooth splined shaft for higher torque applications.

• Large Displacement Range from 1.2 to 12 cm3/rev

• High Performance at Low Cost

• Efficient Pressure Balanced Design

• Proven Reliability and Performance

• Optimum Product Configurations

• Full Range of Auxiliary Features

• Compact, Lightweight

• Modular Product Design

• Quiet Operation

• Worldwide Sales and Service

Gear Pumps Group 1

3

ContentsGroup 1 Family of Gear Pumps .........................................................................................................................2Contents ............................................................................................................................................................3Technical Data...................................................................................................................................................4

System Specifications ....................................................................................................................5Model Code .......................................................................................................................................................6Standard Formulae for Determination of Nominal Pump Size ..........................................................................8Definition and Explanation of Technical Terms ..................................................................................................9System Requirements .....................................................................................................................................10

Hydraulic Fluid .............................................................................................................................................10Temperature and Viscosity ...........................................................................................................................10Fluids and Filtration ..................................................................................................................................... 11Reservoir ...................................................................................................................................................... 11Line Sizing ...................................................................................................................................................12Inlet Design ..................................................................................................................................................12Pump Drive ..................................................................................................................................................13

Pump Drive Data Form .............................................................................................................................14Pump Life ........................................................................................................................................................15Sound Levels ..................................................................................................................................................16Pump Performance .........................................................................................................................................17Product Options ..............................................................................................................................................20

Shaft Options ...............................................................................................................................................20Shaft availability and torque capacity ...........................................................................................20

Mounting flanges .........................................................................................................................................21Available Mounting Flanges .........................................................................................................21

Nonstandard Port Configurations ................................................................................................................22Available Porting Options .............................................................................................................22

Integral Relief Valve (SNI 1) .........................................................................................................................23Variant Codes for Ordering Integral Relief Valve .........................................................................23

Product Dimensional Information ....................................................................................................................24CO01 / SC01................................................................................................................................................24CO02 / CI02 .................................................................................................................................................25FR03 ............................................................................................................................................................26CI06 / SC06 .................................................................................................................................................27Integral Relief Valve Cover ..........................................................................................................................28Nonstandard Port Configurations ................................................................................................................29

Gear Pumps Group 1

4

Technical DataSpecifications for Group 1 pumps are listed on thesetwo pages.

For definition and explanation of the various terms,see page 7.

Caution: Allowable pressure may be limited by shaft torque capability. Refer to page 21.

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Gear Pumps Group 1

5

System Specifications

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T102 001E

T102 002E

T102 003E

T102 004E

Gear Pumps Group 1

6

TypeSNP 1 = Standard Gear PumpSKP 1 = High Torque Gear PumpSEP 1 = Medium Pressure Gear PumpSNI 1 = Gear Pump with Internal Drain Relief Valve

Valve (omit when not used)Displacement

cm3/rev / [(in3/rev]1,2 = 1.18 / [0.072]1,7 = 1.57 / [0.096]2,2 = 2.09 / [0.128]2,6 = 2.62 / [0.160]3,2 = 3.14 / [0.192]3,8 = 3.66 / [0.223]4,3 = 4.19 / [0.256]6,0 = 5.89 / [0.359]7,8 = 7.59 / [0.463]10 = 9.94 / [0.607]12 = 12 / [0.732]

Direction of RotationD = Right (Clockwise)S = Left (Anti-clockwise)

Input Shaft / Mounting Flange / Port ConfigurationCO Tapered shafts, 1:5 or 1:8

CO01 = 1:8 tapered shaft / European four bolt flange / European flanged portsCO02 = 1:5 tapered shaft / German four bolt PTO flange / German standard ports

CI Parallel shafts, 12mm or 12,7mmCI02 = 12mm [0.47]CI06 = 12,7mm [.500 in] parallel shaft / SAE A-A flange / SAE O-ring boss ports

SC Splined shafts,SC02 = splined shaftSC06 = SAE splined shaft / SAE A-A flange / SAE O-ring boss ports

FR Sauer-Sundstrand tang shaftFR03 = Sauer-Sundstrand tang shaft / flanged for multiple configuration / German standard ports

Model Code

/H L M N P R SA B C D E F

Gear Pumps Group 1

7

Variant Code (Three letter code describes valve settings or other variants to standard configuration)LAN=FR03 Configuration without shaft seal

V∗∗ Integral relief valvePressure setting [bar] / (psi)

A = No setting O = [90] (1305)B = No valve P = [100] (1450)C = [18] (261) Q = [110] (1595)D = [25] (363) R = [120] (1740)E = [30] (435) S = [130] (1885)F = [35] (508) T = [140] (2030)G = [40] (580) U = [160] (2320)K = [50] (725) V = [170] (2465)L = [60] (870) W = [180] (2611)M = [70] (1015) X = [210] (3045)N = [80] (1160) Z = [250] (3626)

Pump speed for relief valve setting (min-1 (rpm))A = Not definedC = 500E = 1000F = 1250G = 1500K = 2000I = 2250L = 2500M = 2800N = 3000O = 3250

Version (Value representing a change to the initial project). = Initial project1..9 A..Z = Reserved to

Port Type (If other than standard). = Standard port for the flange type specifiedB = Flanged port with threaded holes in "X" pattern (German standard ports), centered on the bodyC = Flanged port with threaded holes in "+" pattern (European Standard)E = Threaded SAE o-ring boss portF = Threaded Gas port (BSP)

/H L M N P R SA B C D E F

Gear Pumps Group 1

8

Standard Formulae for Determination of Nominal Pump Size

The formulas below will aid in determining the nominalpump size for a specific application.

Output Flow Q =Vg • n • v

1 000

η(l/min)

Input Torque M =Vg • p

20 • • m

∆π η

(Nm)

Input Power P = M • n •30 000

π (kW)Q• p

600 • t

∆η

=

ηt = η ηv • m = Overall efficiency

ηm = Mechanical efficiency

ηv = Volumetric efficiency

n = Speed (min-1 [rpm])

∆p = po-pi (bar) (system pressure)

pi = Inlet Pressure (bar)

po = Outlet Pressure (bar)

Vg = Displacement per revolution (cm3)

Inch System

Output Flow Q =Vg • n • v

231

η(US gal/min)

Input Torque M =Vg • p

2 • • m

∆π η

(lbf • in)

Input Power P = M •n •396 000

π (HP)Q • p

1714 • t

∆η

=

ηt = η ηv • m = Overall efficiency

ηm = Mechanical efficiency

ηv = Volumetric efficiency

n = Speed (min-1 [rpm])

∆p = po-pi (psi) (system pressure)

pi = Inlet Pressure (psi)

po = Outlet Pressure (psi)

Vg = Displacement per revolution (in3)

S102 000ES102 001E

S102 002ES102 003E

Metric System

Gear Pumps Group 1

9

Definition and Explanation of Technical Terms

Maximum speed is the speed limit recommendedwhen operating at rated pressure. It is the highestspeed at which normal life can be expected.

Minimum Speed is the lower limit of operating speed.It is the lowest speed at which normal bearing life canbe expected. It is important to note that the minimumspeed increases as operating pressure increases.When operating under higher pressures, a higherminimum speed must be maintained (see graph be-low).

Where:N

1 = Minimum speed at 150 bar

N2 = Minimum speed at rated pressure

System pressure is the differential of pressure be-tween the outlet and inlet ports. It is a dominantoperating variable affecting hydraulic unit life. Highsystem pressure, which results from high load, re-duces expected life. System pressure must remain ator below rated pressure during normal operation toachieve expected life.

Rated pressure is the average, regularly occurringoperating pressure that should yield satisfactory prod-uct life. It can be determined by the maximum ma-chine load demand. For all systems the load shouldmove below this pressure.

Peak pressure is the highest intermittent pressureallowed, and is determined by the relief valve overshoot (reaction time). Peak pressure is assumed tooccur for less than 100 ms in duration.

Peak Pressure

Rated Pressure

Pre

ssur

e

Time

Reaction time (100ms max)

Inlet pressure must be controlled in order to achieveexpected life and performance. A continuous inletpressure less than those shown in the table belowwould indicate inadequate inlet design or a restrictedinlet screen. Lower inlet pressures during cold startshould be expected, but should improve quickly asthe fluid warms.

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T102 006E

T102 001E

T102 005E

Gear Pumps Group 1

10

Hydraulic Fluid

System Requirements

Ratings and data for Group 1 gear pumps are based onoperation with premium hydraulic fluids containing oxi-dation, rust, and foam inhibitors. These fluids mustpossess good thermal and hydrolytic stability to preventwear, erosion, and corrosion of internal components.

These include:

• Hydraulic fluids per DIN 51524, part 2 (HLP)and part 3 (HVLP)

• API CD engine oils per SAE J183

• M2C33F or G automatic transmission fluids

• Dexron II, IIE, and III meeting Allison C3 orCaterpillar TO-2

• Certain agricultural tractor fluids

For more information on fluid selection, see Sauer-Sundstrand publication BLN-9887 or 697581. Forinformation relating to biodegradable fluids, see Sauer-Sundstrand publication ATI-E 9101.

Never mix hydraulic fluids.

Temperature and Viscosity

Temperature and viscosity requirements must beconcurrently satisfied. The data shown assumes pe-troleum / mineral based fluids. The high temperaturelimits apply at the inlet port to the pump. The pumpshould generally be run at or below the maximumcontinuous temperature. The peak temperature isbased on material properties and should never beexceeded. Cold oil will generally not affect the dura-bility of the pump components, but it may affect theability to flow oil and transmit power; therefore tem-peratures should remain 16°C (30°F) above the pourpoint of the hydraulic fluid. The intermittent (mini-mum) temperature relates to the physical propertiesof component materials. For maximum unit efficiencyand bearing life the fluid viscosity should remain in therecommended viscosity range. The minimumviscosity should be encountered only during briefoccasions of maximum ambient temperature andsevere duty cycle operation. The maximum viscos-ity should be encountered only at cold start. Duringthis condition speeds should be limited until thesystem warms up. Heat exchangers should be sizedto keep the fluid within these limits. Testing is recom-mended to verify that these temperature and viscos-ity limits are not exceeded.

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T102 002E

T102 003E

Gear Pumps Group 1

11

Fluids and Filtration

The function of the reservoir is to provide clean fluid,dissipate heat, remove entrained air, and allow for fluidvolume changes associated with fluid expansion andcylinder differential volumes.

The reservoir should be designed to accommodatemaximum volume changes during all system operatingmodes and to promote deaeration of the fluid as itpasses through the tank. The design should accommo-date a fluid dwell time between 60 and 180 seconds toallow entrained air to escape.

Minimum reservoir capacity depends on the volumeneeded to cool the oil, hold the oil from all retractedcylinders, and allow expansion due to temperaturechanges. Normally, a fluid volume of 1 to 3 times thepump output flow (per minute) is satisfactory. Theminimum reservoir capacity is recommended to be125% of the fluid volume.

To prevent premature wear, it is imperative that onlyclean fluid enter the pump and hydraulic circuit. A filtercapable of controlling the fluid cleanliness to Class 18/13 per ISO 4406 or better under normal operatingconditions is recommended.

The filter may be located on the pump outlet (pressurefiltration), inlet (suction filtration), or the reservoirreturn (return line filtration).

The selection of a filter depends on a number offactors including the contaminant ingression rate, thegeneration of contaminants in the system, the re-quired fluid cleanliness, and the desired maintenanceinterval. Contaminant ingression rate is determined(among other things) by the type of actuators used inthe system. Hydraulic cylinders normally cause higherlevels of contamination to enter the system.

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Filters are selected to meet these requirements usingrating parameters of efficiency and capacity. Filterefficiency may be measured with a Beta ratio1 (β

X). For

suction filtration, with controlled reservoir ingression, afilter with β

35-45 = 75 (and β

10 = 2) or better has been

found to be satisfactory. For return or pressure filtra-tion, filters with an efficiency of β

10 = 75 are typically

required.

Since each system is unique, the filtration require-ments for that system will be unique and must bedetermined by test in each case. Filtration systemacceptability should be judged by monitoring of proto-types, evaluation of components, and performancethroughout the test program.

See Sauer-Sundstrand publications BLN-9887[697581] and ATI-E 9201 for more information.

(1) Filter β x ratio is a measure of filter efficiency defined by ISO4572. It is defined as the ratio of the number of particlesgreater than a given diameter (“x” in microns) upstream of thefilter to the number of these particles downstream of the filter.

Reservoir

The suction line should be located above the bottom ofthe reservoir to take advantage of gravity separationand prevent large foreign particles from entering theline. A 100 -125 µm screen covering the suction line isrecommended. To minimize vacuum at the pumpinlet, it is recommended that the pump be locatedbelow the lowest expected fluid level.

The return line should be positioned to allow dis-charge below the lowest fluid level, and directedinto the interior of the reservoir for maximum dwelland efficient deaeration.

A baffle (or baffles) between the return line andsuction line will promote deaeration and reducesurging of the fluid.

T102 004E

Gear Pumps Group 1

12

The choice of piping size and installation shouldalways be consistent with maintaining minimum fluidvelocity. This will reduce system noise, pressuredrops and overheating, thereby maximizing systemlife and performance. Inlet piping should be designedto maintain continuous pump inlet pressures above0.8 bar absolute during normal operation. The inletline velocity should not exceed 2.5 m/s [8.2 ft/s]. Pumpoutlet line velocity should not exceed 5 m/s [16.4 ft/s].System return lines should be limited to 3 m/s [9.8 ft/s].

Inlet Design

Hydraulic oil used in the majority of systems containsabout 10% dissolved air by volume. Under conditionsof high inlet vacuum, bubbles are released from theoil. These bubbles collapse when subjected to pres-sure, which results in cavitation which causes erosionof the adjacent material. Because of this, the greaterthe air content within the oil, and the greater thevacuum in the inlet line, the more severe will be theresultant erosion.

The main causes of over-aeration are air leaks on theinlet side of the pump, and flow line restrictions. Thesemay include inadequate pipe sizes, sharp bends, orelbow fittings causing a reduction of flow line crosssectional area. Providing pump inlet vacuum andrated speed requirements are maintained, and reser-voir size and location are adequate, no cavitationproblems should occur.

Line Sizing

Gear Pumps Group 1

13

Pump Drive

With a choice between tapered, splined, or parallelshafts, Sauer-Sundstrand gear pumps are suitablefor a wide range of direct and indirect drive applica-tions. Typically these applications use a plug-in, belt,or gear to drive the pump input shaft. Group 1 pumpsare designed with bearings that can accept someincidental external radial and thrust loads.

For in-line drive applications, it is recommended thata three piece coupling be used to minimize radial orthrust shaft loads. Plug-in drives, acceptable onlywith spline shaft configurations, can impose severeradial loads on the pump shaft when the mating splineis rigidly supported. Increased spline clearance doesnot alleviate this condition. The use of plug in drivesis permissible providing that the concentricity be-tween the mating spline and pilot diameter is within0.1 mm [.004 in]. The drive should be lubricated byflooding with oil.

The allowable radial shaft loads are a function of theload position, the load orientation, and the operatingpressure of the hydraulic pump. All external shaftloads will have an effect on bearing life and may affectpump performance. In applications where externalshaft loads cannot be avoided, the impact on thepump can be minimized by optimizing the orientationand magnitude of the load. A tapered input shaft isrecommended for applications where radial shaftloads are present. Spline shafts are not recom-mended for belt or gear drive applications. For beltdrive applications, a spring loaded belt tension deviceis recommended to avoid excessive belt tension.

Thrust (axial) loads in either direction should beavoided. If continuously applied external radial orthrust loads are known to occur, contact Sauer-Sundstrand for evaluation.

Contact your Sauer-Sundstrand representative for assis-tance when applying pumps with radial or thrust loads.

Pilot Cavity

Mating Spline

Ø 0.1 [.004]

P102 002E

Gear Pumps Group 1

14

Photo copy this page and fax the completed form toyour Sauer-Sundstrand representative for assistancein applying pumps with belt or gear drive.

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T102 007E

P102 003E

Pump Drive Data Form

Anti-clockwise pump shown.

Gear Pumps Group 1

15

Pump Life

All Sauer-Sundstrand gear pumps utilize hydrody-namic journal bearings which have an oil film main-tained between the gear / shaft and bearing surfacesat all times. If this oil film is sufficiently sustainedthrough proper system maintenance and operatingwithin recommended limits, long life can be expected.

NOTE: A B10

type life expectancy number is generallyassociated with rolling element bearings and doesnot exist for hydrodynamic bearings.

Pump life is defined as the life expectancy of thehydraulic components and is a function of speed,system pressure, and other system parameters suchas oil cleanliness. High pressure, which results fromhigh load, reduces expected life in a manner similarto many mechanical assemblies such as enginesand gear boxes. When reviewing an application, it isdesirable to have projected machine duty cycle datawhich includes percentages of time at various loadsand speeds.

Prototype testing programs to verify operating pa-rameters and their impact on life expectancy arestrongly recommended prior to finalizing any systemdesign.

Gear Pumps Group 1

16

Sound LevelsFluid power systems are inherent generators of noise.As with many high power density devices, noise is anunwanted side affect. However, there are manytechniques available to minimize noise from fluidpower systems. To apply these methods effectively,it is necessary to understand how the noise is gener-ated and how it reaches the listener.

The noise energy can be transmitted away from itssource as either fluid borne noise (pressure ripple) oras structure borne noise.

Pressure ripple is the result of the number of pump-ing elements (gear teeth) delivering oil to the outletand the pump’s ability to gradually change the vol-ume of each pumping element from low to highpressure. In addition, the pressure ripple is affectedby the compressibility of the oil as each pumpingelement discharges into the outlet of the pump.Pressure pulsations will travel along the hydrauliclines at the speed of sound (about 1400m/s in oil)until affected by a change in the system such as anelbow fitting. Thus the pressure pulsation amplitudevaries with overall line length and position.

Structure borne noise may be transmitted wher-ever the pump casing is connected to the rest of thesystem.

The manner in which one circuit component re-sponds to excitation will depend on its size, form, andmanner in which it is mounted or supported. Be-cause of this excitation, a system line may actuallyhave a greater noise level than the pump. To reducethis excitation, use flexible hoses in place of steelplumbing. If steel plumbing must be used, clampingof lines is recommended. To minimize other struc-ture borne noise, use flexible (rubber) mounts.

Contact your Sauer-Sundstrand representative forassistance with system noise control.

Gear Pumps Group 1

17

Pump Performance

The following performance graphs provide typicaloutput flow and input power for Group 2 pumps atvarious working pressures. Data was taken usingISO VG46 petroleum / mineral based fluid at 50oC(viscosity = 28 mm

2/s [cSt]).

T102 009E

T102 010E T102 011E

SEP1/1,7SNP1/1,7SKP1/1,7

SEP1/2,2SNP1/2,2SKP1/2,2

7

6

5

4

3

2

1

00 1000 2000 3000 4000

4

3

2

1

0

9

8

7

6

5

4

3

2

1

00 1000 2000 3000 4000

6

5

4

3

2

1

0

only SNP1and SKP1

7 ba

r25

0 ba

r

250 bar

100 bar

150 bar

7 ba

r

250 bar

250

bar

100 bar

150 bar

Flo

w (

l/m)

Pow

er (

kW)

0 1000 2000 3000 4000Speed min -1 (rpm)

5

4

3

2

1

0

3

2

1

0

only SNP1and SKP1

SEP1/1,2SNP1/1,2SKP1/1,2

7 ba

r 250

bar

150 bar

100 bar

250 bar

1.2

1.0

0.8

0.6

0.4

0.2F

low

(U

S g

al/m

in) 4

3

2

1

0

Pow

er (

HP

)

Flo

w (

l/m)

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

Flo

w (

US

gal

/min

)

Pow

er (

kW)

5

4

3

2

1

0

Pow

er (

HP

)

Speed min -1 (rpm) Speed min -1 (rpm)

Flo

w (

US

gal

/min

)

Pow

er (

kW)

Flo

w (

l/m)

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

8

7

6

5

4

3

2

1

0

Pow

er (

HP

)

only SNP1and SKP1

Gear Pumps Group 1

18

T102 012E T102 013E

T102 014E T102 015E

SEP1/4,3SNP1/4,3SKP1/4,3

SEP1/3,8SNP1/3,8SKP1/3,8

SEP1/3,2SNP1/3,2SKP1/3,2

13

12

11

10

9

8

7

6

5

4

3

2

1

00 1000 2000 3000 4000

only SNP1and SKP1

7

6

5

4

3

2

1

0

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

00 1000 2000 3000 4000

only SNP1and SKP1

8

7

6

5

4

3

2

1

0

13

12

11

10

9

8

7

6

5

4

3

2

1

00 1000 2000 3000

only SNP1and SKP1

7

6

5

4

3

2

1

0

....

......

7 ba

r25

0 ba

r

250 bar

150 bar

100 bar

7 ba

r25

0 ba

r

250 bar

150 bar

100 bar

7 ba

r25

0 ba

r

250 bar

150 bar

100 bar

SEP1/2,6SNP1/2,6SKP1/2,6

6

5

4

3

2

1

0

11

10

9

8

7

6

5

4

3

2

1

00 1000 2000 3000 4000

only SNP1and SKP1

7 ba

r25

0 ba

r

250 bar

150 bar

100 bar



Flo

w (

US

gal

/min

)

Flo

w (

l/m)

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

Pow

er (

kW)

8

7

6

5

4

3

2

1

0

Pow

er (

HP

)

Flo

w (

US

gal

/min

)

Flo

w (

l/m)

3.4

3.2

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

Pow

er (

kW)

9

8

7

6

5

4

3

2

1

0

Pow

er (

HP

)

Flo

w (

US

gal

/min

)

Flo

w (

l/m)

3.83.63.43.23.02.82.62.42.22.01.81.61.41.21.00.80.60.40.2

Pow

er (

kW)

109876543210

Pow

er (

HP

)

Pow

er (

kW)

10

9

8

7

6

5

4

3

2

1

0

Pow

er (

HP

)

Flo

w (

US

gal

/min

)

Flo

w (

l/m)

3.4

3.2

3.0

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

Gear Pumps Group 1

19

T102 016E T102 017E

T102 018E T102 019E

4.4

4.0

3.6

3.2

2.8

2.4

2.0

1.6

1.2

0.8

0.4

6.0

5.6

5.2

4.8

4.4

4.0

3.6

3.2

2.8

2.4

2.0

1.6

1.2

0.8

0.4

SKP1/10SKP1/12

30

28

26

24

22

20

18

16

14

12

10

8

6

4

2

0

0 1000 2000 3000

10

8

6

4

2

00 1000 2000 3000

24

22

20

18

16

14

12

10

8

6

4

2

0

12

10

8

6

4

2

0

40

35

30

25

20

15

10

5

00 1000 2000 3000

15

10

5

0

....

......

....

......

only SKP1

7 ba

r15

0-20

0 ba

r

200 bar

150 bar

100 bar

7 ba

r

100 bar

140

bar

140 bar

50 bar

7 ba

r

130

bar

130 bar

100 bar

50 bar

SEP1/6SNP1/6SKP1/6

18

16

14

12

10

8

6

4

2

0

10

8

6

4

2

00 1000 2000 3000

....

......

7 ba

r17

0-23

0 ba

r

250 bar

150 bar

100 bar

170 bar



Flo

w (

US

gal

/min

)

Flo

w (

l/m)

Pow

er (

kW)

12

10

8

6

4

2

0

Pow

er (

HP

)

Flo

w (

US

gal

/min

)

Flo

w (

l/m)

Pow

er (

kW)

14

12

10

8

6

4

2

0

Pow

er (

HP

)

Flo

w (

US

gal

/min

)

Flo

w (

l/m)

7.67.26.86.46.05.65.24.84.44.03.63.22.82.42.01.61.20.80.4

Pow

er (

kW)

14121086420

Pow

er (

HP

)

Flo

w (

US

gal

/min

)

Flo

w (

l/m)

10.510.09.59.08.58.07.57.06.56.05.55.04.54.03.53.02.52.01.51.00.5

Pow

er (

kW)

20

15

10

5

0

Pow

er (

HP

)

SEP1/7,8SNP1/7,8SKP1/7,8

only SKP1

Gear Pumps Group 1

20

Product Options

Shaft Options

Group 1 pumps are available with a variety of splined,parallel, and tapered shaft ends. Not all shaft stylesare available with all flange styles. Valid combinationsand nominal torque ratings are shown in the tablebelow. Torque ratings assume no external radial load-ing. Applied torque must not exceed these limitsregardless of pressure parameters stated earlier. Maxi-mum torque ratings are based on shaft torsionalfatigue strength.

Recommended mating splines for Group 1 splinedoutput shafts should be in accordance with SAE J498or special spline. Sauer-Sundstrand external SAEsplines are flat root side fit with circular tooth thicknessreduced by 0.127 mm [.005 in] in respect to class 1 fit.These dimensions are modified in order to assure aclearance fit with the mating spline.

Other shaft options may exist. Contact your Sauer-Sundstrand representative for availability.

H L M N P RA B C D E F/

SShaft availability and torque capacity

T102 021E

Gear Pumps Group 1

21

Mounting flanges

Many types of industry standard mounting flangesare available. The following table shows order codesfor each mounting flange and its intended use.

See Product Dimensional Information (page 24) foroutline drawings of pumps and the various mountingflanges.

Contact your Sauer-Sundstrand representative formore information on specific flanges.


SAvailable Mounting Flanges

T102 022E

Gear Pumps Group 1

22

Nonstandard Port Configurations

Various port configurations are available on group 1pumps including:

• European standard flanged port

• German standard flanged port

• Gas threaded port (BSPP)

• O-ring boss per SAE J1926/1 [ISO 11926-1](UNF threads)

Standard porting offered with each mounting flangetype is listed in the table below. If porting other thanstandard is desired, use the order codes shown.

See Product Dimensional Information on page 29 foroutline drawings and dimensions of the ports listed here.

Other ports are available on special order. Contact yourSauer-Sundstrand representative for types and availability.

∗ Use only if porting is nonstandard for the flange type ordered.


SAvailable Porting Options

T102 023

Gear Pumps Group 1

23

Bar with mineral oil @ 26 cSt

0

1000

2000

3000

4000

5000

Psi

0 4 8 12 16 20 l/min

0 1 2 3 4 5 US gpm

0

100

200

300

400

MINIMUM VALVE SETTING

Integral Relief Valve (SNI 1)Group 1 pumps are offered with an optionalintegral relief valve in the rear cover. This valve hasan internal drain. This valve opens directing all flowfrom the pump outlet to the internal drain when thepressure at the outlet reaches the valve setting. Thisvalve can be ordered preset to the pressures shownin the table below. Valve schematic, performancecurve, and rear cover cross section are shown here.

CAUTION: When the relief valve is operating inbypass condition, rapid heat generation will occur. Ifthis bypass condition is maintained, premature pumpfailure will result.For pressures higher than 210 bar and lower than 50bar apply to your Sauer-Sundstrand representative.

The tables to the left show applicable variant codesfor ordering pumps with integral relief valve. Refer tothe Model Code (page 6,7) for more information.

Drain

Outlet

i = Inlet

o = Outlet

i

o

VRrofdeepSpmuPnim-gnitteS 1- )mpr(

edoC

denifeDtoN A

005 C

0001 E

0521 F

0051 G

0002 K

0522 I

0052 L

0082 M

0003 N

0523 O

gnitteSerusserP]isp[rab

edoC

gnitteSoN A

evlaVoN B

]162[81 C

]363[52 D

]534[03 E

]805[53 F

]085[04 G

]527[05 K

]078[06 L

]5101[07 M

]0611[08 N

]5031[09 O

]0541[001 P

]5951[011 Q

]0471[021 R

]5881[031 S

]0302[041 T

]0232[061 U

]5642[071 V

]1162[081 W

]5403[012 X

]6263[052 Z

H L M N P RA B C D E F/ V

T102 030E

P102 016

P102 017T102 028E

T102 029E

Variant Codes for Ordering Integral Relief Valve

24

Gear Pumps Group 1

Distance from front flangeto cone reference diameter

Con

e re

fere

nce

diam

eter

1:8

7-6g

M

9.82

[.38

7]Ø

29 [1.142]

A +0.50+0.50-0.50-0.50

[+.020][+.020][-.020][-.020]

B max

5.2 [.205]

12.4 [.488]

Pilot width

X

10.8

+0.

50-0

.50

[.425

]+

.020

-.02

0

25.4

-0.0

20-0

.053

[1]

Ø

16.5 [.650]4.2 [.165]body width

0.75

[.03

0]X

==

74.5

[2.9

33] m

ax

Ø 7.2-8 [.283-.315]

45.7

[1.7

99]

26.2

[1.0

31]

(71.

9 [2

.831

])

(53.

8 [2

.118

] max

)(3

4.3

[1.3

50] m

ax)

88.1

[3.4

69] m

ax

52.4 [2.063]

69.4 [2.732] max

68 +0.25+0.25-0.25 [2.677 ]+.010+.010

-.010-.010

2.41 0-0.025-0.025 [.095 ] 0

-.001-.001

5.5

+0.

15-0

.25

[.217

]+

.006

-.01

0 (p.u.:10 [.394])E/e

D/d +0.20+0.20-0.20-0.20

[+.08][+.08][-.08][-.08]

C/c

Distance fromfront flangeto shoulder

Scan.to

Z=15 M=0.75 alfa=30°1.028-1.068 : Circular[.040-.042] tooth thickness

9.8-10 : Internal spline dia[.386-.394]

(spline)

0 -0.1

10Ø

11.

9 0 -.

04[.4

69]

21.5 [.846]

14 [.551]

4.5 [.177]

-.00

1-.

002

14.4 [.567]

)tnemecalpsid(epyT2,1 7,1 2,2 6,2 2,3 8,3 3,4 6 8,7

snoisnemiDA

57.73]684.1[

5.83]615.1[

5.93]555.1[

5.04]495.1[

5.14]436.1[

5.24]376.1[

5.34]317.1[

57.64]148.1[

05]969.1[

B5.97

]031.3[18

]981.3[38

]862.3[58

]643.3[78

]524.3[98

]405.3[19

]385.3[5.79

]938.3[401

]490.4[

telnI

C ]274.[21

D ]420.1[62

E 5M

teltuO

c ]274.[21

d ]420.1[62

e 5M

P102 021ET102 033E

Product Dimensional Information

CO01 / SC01

Standard porting shown. See page 29 for additionalporting options. See page 28 for valve options.

CO01 SC01

mm[in]

25

Gear Pumps Group 1

CO02 / CI02Standard porting shown. See page 29 for additionalporting options. See page 28 for valve options.

CO02 CI02

P102 022ET102 034E

)tnemecalpsid(epyT2,1 7,1 2,2 6,2 2,3 8,3 3,4 6 8,7 01 21

snoisnemiDA

57.73]684.1[

5.83]615.1[

5.93]555.1[

5.04]495.1[

5.14]436.1[

5.24]376.1[

5.34]317.1[

57.64]148.1[

05]969.1[

5.45]641.2[

5.85]303.2[

B5.97

]031.3[18

]981.3[38

]862.3[58

]643.3[78

]524.3[98

]405.3[19

]385.3[5.79

]938.3[401

]490.4[311

]944.4[121

]467.4[

telnI

C ]274.[21

D ]420.1[62

E 5M

teltuO

c ]274.[21

d ]420.1[62

e 5M

Distance from front flangeDistance from front flangeto cone reference diameterto cone reference diameter

Con

e re

fere

nce

diam

eter

1:8

10M

x1-6

g

13.9

5 [.5

49]

Ø

35 [1.378]

A +0.50-0.50

[+.020][-.020]

B max

8 [.315]

15.75 [.620]

Pilot widthPilot width

X

10.8

+0.

50+

0.50

-0.5

0-0

.50[.4

25]

+.0

20+

.020

-.02

0-.

020

30-0

.020

-0.0

20-0

.053

-0.0

53[1

.181

]-.

001

-.00

1-.

002

-.00

2Ø

16.5 [.650]7 [.276]body width

0.75

[.03

0]X

==

74.5

[2.9

33] m

ax

Ø 6.7-7.5[.264-.295]

48.5

[1.9

09]

24.5

[.96

5]

(73

[2.8

74])

(56.

1 [2

.209

] max

)(3

2.1

[1.2

64] m

ax)

88.2

[3.

472]

max

56 [2.205]

70.9 [2.791] max

88 +0.25-0.25 [3.465 ]+.010

-.010

(p.u.:10 [.394])E/e

D/d +0.20-0.20

[+.08][-.08]

C/c

Distance fromDistance fromfront flangefront flangeto shoulderto shoulder

12 0 -0

.018

-0.0

18[.4

72]

0 -.00

1-.

001

Ø

10M

x1-6

g

31.5 [1.240]

11.7 [.461]8.3 [.327]

3 0-0.030 [.118 ] 0

-.001

7.5

+0.

25+

0.25

-0.1

5-0

.15

[.295

]+

.010

+.0

10-.

006

-.00

6

3 0-0.030 [.118 ] 0

-.001

13.2

+0.

05+

0.05

-0.2

0-0

.20

[.520

]+

.002

+.0

02-.

008

-.00

8

15.5 [.610]

mm[in]

26

Gear Pumps Group 1

Pilot width

X

7 [.276]

22 [.

866]

Ø

8.5 [.335]

10.8

+0.

50+

0.50

-0.5

0-0

.50

[.425

]+

.020

+.0

20-.

020

-.02

0

A +0.50+0.50-0.50-0.50

[+.020][+.020][-.020][-.020]

B +1-1

[+.039][+.039][-.039][-.039] 8.5 [.335] max

5-0

.020

-0.0

20-0

.080

-0.0

80[.1

97]

-.00

1-.

001

-.00

3-.

003

0.8 +0.40-0.30 [.031 ]+.016+.016

-.012 4.8 +0.10+0.10-0.10-0.10 [.189 ]+.004+.004

-.004-.004

32-0

.025

-0.0

25-0

.064

-0.0

64[1

.260

]-.

001

-.00

1-.

003

-.00

3Ø

C/c

OR 28.30x1.78

Ø 2

2.75

[.8

96] m

in

2.5 [.098] 2 [.079]

body width

Ø 0

.4 [.

016]

X=

=74

.5 [2

.933

] max

29.6

5[1

.167

]10

.35

[.407

]

(40

[1.5

75])

40[1.575]

8.5-9 [.335-.354]Ø

63 +0.25+0.25-0.25-0.25 [2.480 ]+.010+.010

-.010-.010

)tnemecalpsid(epyT2,1 7,1 2,2 6,2 2,3 8,3 3,4 6 8,7

snoisnemiDA

57.73]684.1[

5.83]615.1[

5.93]555.1[

5.04]495.1[

5.14]436.1[

5.24]376.1[

5.34]317.1[

57.64]148.1[

05]969.1[

B07

]657.2[5.17

]518.2[5.37

]498.2[5.57

]279.2[5.77

]150.3[5.97

]031.3[5.18

]902.3[88

]564.3[5.49

]027.3[

telnI C5.1x81M

peed]274.[mm21DHT

teltuO c5.1x41M

peed]274.[mm21DHT5.1x81M

peed]274.[mm21DHT

P102 023ET102 035E

FR03Standard porting shown. See page 29 for additionalporting options. See page 28 for valve options.

FR03

mm[in]

27

Gear Pumps Group 1

P102 024ET102 036E

CI06 / SC06Standard porting shown. See page 29 for additionalporting options. See page 28 for valve options.

CI06 SC06


snoisnemiDA

52.24]366.1[

34]396.1[

44]237.1[

54]277.1[

64]118.1[

74]058.1[

84]098.1[

52.15]810.2[

5.45]641.2[

95]323.2[

5.36]005.2[

B48

]703.3[5.58

]663.3[5.78

]544.3[5.98

]425.3[5.19

]206.3[5.39

]186.3[5.59

]067.3[201

]610.4[5.801]272.4[

5.711]626.4[

5.521]149.4[

telnI CB2-FNU81-]057.[4/3

peed]365.[mm3.41DHT

teltuO cB2-FNU81-]365.[61/9

peed]005.[mm7.21DHT

Straight thread

O-Ring boss

cC

13.94-14.20[.549-.559]

3.2

0 -0.0

25-0

.025

[.126

] 0 -.

001

-.00

1

SAE J498-9T-20/40DP

FLAT ROOT SIDE FIT

Circular tooth thickness 0.127 mm [.005]

less than class 1 fit

Distance fromfront flangeto shoulder

27 [1.063]

12.3

44 0 -0

.127

-0.1

27[.4

86]

0 -.05

-.05

Ø

15.6 [.614]

7.9 [.311] 19.1 [.752]

==

X0.

75 [.

030]

body width

103.4 [4.071] max

82.55 [3.258]

80.2

[3.1

57] m

ax

10.2

-10.

8 [.4

02-.

425]

68 +0.25+0.25-0.25-0.25

[2.677 ]+.010+.010-.010-.010

32.1 maxR

X

Pilot width

10.8

+0.

50+

0.50

-0.5

0-0

.50[.4

25]

+.0

20+

.020

-.02

0-.

020

6 [.236] 8 [.315]

50.8

0 -0.0

50-0

.050

[2]

0 -.00

2-.

002

Ø

Distance from front flangeto shoulder

B max

A +0.50+0.50-0.50-0.50

[+.020][+.020][-.020][-.020]

27 [1.063]

0 -0.0

25-0

.025

[.500

] 0 -.

001

-.00

1Ø

12.

7

19.1[.752] 7.9 [.311]

74.5

[2

.933

] max

mm[in]

28

Gear Pumps Group 1

Note: for configuration 06 the dimensions B and V must be increased 4.5 mm [.177].

P102 025ET102 037E

Integral Relief Valve Cover


snoisnemiDB

5.59]067.3[

79]918.3[

99]898.3[

101]679.3[

301]550.4[

501]431.4[

701]312.4[

5.311]964.4[

021]427.4[

921]970.5[

731]493.5[

V58

]643.3[5.68

]604.3[5.88

]484.3[5.09

]365.3[5.29

]246.3[5.49

]027.3[5.69

]997.3[301

]550.4[5.901]113.4[

5.811]566.4[

5.621]089.4[

For configuration 03 only

V +1.0+1.0-0.5-0.5

[+.039][+.039][-.020][-.020]

B max

62 [2.441] max

74.5

[2.9

33] m

ax

mm[in]

29

Gear Pumps Group 1

∗ Mark only if desired porting is non standard for the flange code selected. Otherwise mark "."

E DF

G

45°

H (4 holes min. full thd.12mm [.472] deep)

B

A

C (4 holes min. full thd.12mm [.472] deep)

C G or B F E

snoisnemiD

*edoCledoM C B D D F E

tropdradnatSedocegnalfrof

20/10dradnatsnon

)ydobnoderetnecstroP(non

dradnats30 dradnatsnon 60

epyT)tnemecalpsid(

B A C F G H E E E D

2,1 telnI ]264.[21 ]420.1[62 5M ]215.[31 ]181.1[03 6M 5.1x81M 5.1x81M )PPSB(saG8/3 B2-FNU61-)4/3(057.

teltuO ]264.[21 ]420.1[62 5M ]513.[8 ]181.1[03 6M 5.1x81M 5.1x81M )PPSB(saG8/3 B2-FNU81-)61/9(365.













6 telnI ]264.[21 ]420.1[62 5M ]215.[31 ]181.1[03 6M 5.1x81M 5.1x81M )PPSB(saG8/3 B2-FNU61-)4/3(057.








P102 029ET102 042E

Nonstandard Port Configurationsmm[in]

Gear Pumps Group 1

30

Notes

Gear Pumps Group 1

31

Notes

SAUER-SUNDSTRAND Hydraulic Power Systems - Market Leaders Worldwide

SAUER-SUNDSTRAND specializes in integrating a fullrange of system components to provide vehicle designerswith the most advanced total-design system.

SAUER-SUNDSTRAND is Your World Source forControlled Hydraulic Power Systems.

SAUER-SUNDSTRAND is a world leader in the design andmanufacture of Hydraulic Power Systems. Research anddevelopment resources in both North America and Europeenable SAUER-SUNDSTRAND to offer a wide range ofdesign solutions utilizing hydraulic power systemtechnology.

Worldwide Service Support

SAUER-SUNDSTRAND provides comprehensive worldwide service for itsproducts through an extensive network of Authorized Service Centersstrategically located in all parts of the world.

Look to SAUER-SUNDSTRAND for the best in WORLDWIDE SERVICE.

Genuine Service PartsGear Pumps and MotorsOpen Circuit Axial Piston Pumps

Hydraulic Power Systems

Cartridge Motors/Compact Wheel Drives

Heavy Duty Bent AxisVariable Motors

Heavy Duty Axial PistonPumps and Motors

Hydrostatic TransmissionPackages

Microcontrollers andElectrohydraulic Controls

http://www.sauer.com

SAUER-SUNDSTRAND S.p.A.Via Villanova, 28 • 40050 Villanova di Castenaso (B0) Italy • Tel. +39 051 6054411 • Fax +39 051 6053033Via C. Bonazzi, 19/21 • 40013 Castel Maggiore (BO) Italy • Tel. +39 051 701745 • Fax +39 051 701386email: [email protected]

Medium Duty Axial PistonPumps and Motors

SAUER-SUNDSTRAND COMPANY2800 East 13th Street • Ames IA 50010 • U.S.A.Phone: (515) 239-6000 • FAX: (515) 239-6618

SAUER-SUNDSTRAND GMBH & CO.Postfach 2460 • D-24531 NeumünsterKrokamp 35 • D-24539 Neumünster • GermanyPhone: (04321) 871-0 • FAX: (04321) 087 122

TI-GP1-E • 11/99 • 300 069

Group 1 - Freehynedi.free.fr/doc_technique/pompe_sauer_groupe1.pdf · Gear Pumps Group 1 4...

Documents

Transcript of Group 1 - Freehynedi.free.fr/doc_technique/pompe_sauer_groupe1.pdf · Gear Pumps Group 1 4...