T Cooler AKG

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Features

High effic iency cooling systems made from Aluminium

High performance a nd working pressure - even for heavy duty

hydraulic and lubrication applications

Maximum working pressure

T1 -T8 26 ba r

T9 -T11 10 ba r

Offering high flexibility for usa ge with trans mission, engine, hydraulic and

lubrication oils

May be also used as off-line co olers

Co oling sys tems ca n be fitted with 12V/24V DC, 3 phase or hydraulic moto rs

Benef i ts Short lead times

Cost effective

Cooling systems fully equipped for

immediate use

Spares from stock

Robust design, tried and tested for

many years

Maintenance free

Low noise levels

Appl icat ions

The units can be

used for cooling: mineral oil, s ynthetic o il, b io oil, HFA B C D liquids,

wa ter/glyco l mixture, conta ining 50% a ntifreezeand corrosion inhibitors

Function: Heat will be transferred from the fluid to the cooling

air flow

Options

Temperature regulator

Off-line cooler packages w ith integral pump

6 0 H z ele c tric m otors

Pusher fans (standard equipment is puller fans)

(T

)(T

)

Please note:

Set up and operating instructions

General Terms of Sales and

Delivery

Spares list

General

Our Trange is designed to help you find an

individual solution for your cooling applica-tion.

Our cooling sys tems o ffer a wide variety of

products w hich ha ve been fully tried and

tested even under the most arduous

working conditions.

A range of 11 basic types covers almost all

cooling applications involving a large variety

of fluids in stationary and mobile machines.

AKG a nd its representa tives a s expe rts in

the field of cooling systems will be delighted

to assist you.

As part of our ongoing technical improve-ments, AKG maintains the right to introduce

modifications to the specifications in this

brochure.

Y o u r p a r t n e r f o r h y d r a u l i c c o o l e r s

Oil/Air-Cooling Systems

AKG-RangeT1 - T11


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Lubrication oil applicationsHydrauli c appli cations

B u i l d i n g M a c h i n e s , C o m p r e s s o r s , C r a n e s , C r a w l e r s , D r i l l s , E x c a v a t o r s , G r a d e r s , L o a d e r s , P i p e L a y e r s , S c r a p e r s , S c r e w C o m p r e s s o r s , V i b r a t i o n R o l l e r s , M a c h i n e s ,

Easy sizing of T-c ool ers

The following ta bles ma y be us ed to q uickly selec t a T-coo ler.

The da ta is ba sed o n the ass umption that oil inlet temperature does not e xceed 70 C for

hydraulic and 110 C fo r lubrication ap plica tions.

Please use the following heat rejection figures if no details are available:

- Agricultural and co nstruction machinery: 1/3 of Diese l eng ine pow er

- Hydraulic pumps driven by an electric motor: 1/3 of electric motor pow er

Heat re ject ion [kW @ 30 C ambi ent temperature]

Oil flow T1 T2 T3 T4 T5K T5 T6 T7 T8 T8S T9 T10 T11

in l/min

10 2 4 6

20 3 6 8 11 15

30 4 7 10 13 17

50 5 8 12 15 18 21 28 32 39 46

75 5.5 9 13 17 20 23 30 34 42 52 80

100 10 14 18 21 24 31 36 44 56 86 112

150 16 19 23 26 34 38 48 63 93 128 167

200 28 35 40 50 68 100 140 180

250 51 72 108 148 193

300 112 156 208400 120 168 228

500 180 248

600 264

Heat re ject ion [kW @ 40 C ambi ent temperature]

Oil flow T1 T2 T3 T4 T5K T5 T6 T7 T8 T8S T9 T10 T11

in l/min

10 1.5 3 520 2.5 4 6 8 11

30 3 5 7 10 13

50 3.5 6 9 11 14 16 21 24 29 35

75 4 7 10 12 15 17 22 26 31 39 60

100 8 11 13 16 18 23 27 33 42 65 84

150 12 14 17 20 25 29 36 47 70 96 125

200 21 26 30 37 51 75 105 135

250 38 54 81 111 145

300 84 117 156

400 90 126 171

500 135 186

600 198

Easy sizing of T-c ooler s

For a more detailed and customised cooler selection exact temperatures and flows are necessary.

Please select your cooler according to the example on page 10 or seek advice from AKG or its

representatives.

Heat re ject ion [kW @ 30 C ambi ent temperature ]

Oil flow T1 T2 T3 T4 T5K T5 T6 T7 T8 T8S T 9 T 10 T 11

in l/min

10 4 8 12

20 6.5 11 16 22 30

30 8 14 19 26 34 35

50 9.5 17 23 30 37 42 55 64 78 93

75 10.5 19 26 34 40 46 60 69 83 104 160

100 21 28 35 42 49 62 72 88 112 172 224

150 32 38 46 53 67 77 96 126 187 256 330

200 56 70 80 100 136 200 280 360

250 102 144 216 296 387

300 224 312 416400 240 336 456

500 360 496

600 528

Heat re ject ion [kW @ 40 C ambi ent temperature ]

Oil flow T1 T2 T3 T4 T5K T5 T6 T7 T8 T8S T 9 T 10 T 11

in l/min

10 3.5 7 1120 5.5 10 14 20 27

30 7 12 17 22 30

50 8 14 20 27 32 37 48 56 69 81

75 9 16 22 29 35 40 53 60 73 91 140

100 18 24 31 37 43 55 63 77 98 150 196

150 28 33 40 46 59 67 84 110 163 224 292

200 49 62 70 88 119 175 245 315

250 90 126 189 259 338

300 196 273 364

400 210 294 399

500 315 434

600 462

Hydraul ic appl ications Lubrication oi l appl ications


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2

1,8

1,6

1,4

1,2

1

0,8

0,6

0,4

0,2

50 100 150 200 250 300

Speci f ic heat re ject ion T1 - T8

T8 S

T8

T7

T6

T5

T5 K

T4T3

T2

T1

Speci f ic heat re ject ion T9 - T11

8

7

6

5

4

3

2

1

100 200 300 400 500 600

T11

T11 L

T10

T10 L

T9

T9 L

100 200 300 400 500 600

Pressure drop T9 - T11

4

3,5

3

2,5

2

1,5

1

0,5

p @ 30cSt viscosity

Oil flow (l/min)

Oil flow (l/min)Oil flow (l/min)

PK/ETD (k W/K) PK/ETD (kW /K)

Pressure drop T1 - T8

50 100 150 200 250

Oil flow (l/min)

1,8

1,6

1,4

1,2

1

0,8

0,6

0,4

0,2

p @ 30 cSt viscosity

0

0

0

0

T10

T9

T11

T1

T2

T5 K T3

T7

T6

T5 T4 T8

To c alculate p ressure drop da ta a t other viscos ities pleas e look at exa mple on pag e 11.

T8L

T7L

T6L

T5LT4LT3L

T2L

T o o l s , C a s t i n g M a c h i n e s , E l e v a t o r s , E x t r u s i o n M a c h i n e s , F o r g i n g M a n i p u l a t o r s , F o r g i n g P r e s s e s , G e a r s , H y d r a u l i c S y s t e m s , P i p e B e n d i n g M a c h i n e s , P r e s s e s , P u m p s ,

To ca lculate pressure drop d ata at o ther visco sities pleas e look at e xample on pa ge 11.


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10 11

Conversion factors for dif ferent oi l pressure drops

The pressure drop curves on pa ges 8 and 9 a re based on a visco sity of 30 mm 2/s = 30 cSt.

Pleas e use conversion fac tor f to ca lculate p ressure drop a t other visco sities.

Example:

Pres sure drop of typ e T7 is 1.3 ba r @ 150 l/min and 30 mm2/s.

Assume an o il type ISO VG 46 is used @ 60 C ha ving a visco sity of 20 mm2/s.

To c alculate new pressure drop multiply 1.3 bar by f = 0.75 to obta in the a ctual pressure drop 1 ba r

approximately.

Notes:

mm 2 10 15 20 30 40 50 60 80 100s

f 0.5 0.65 0.75 1.0 1.2 1.4 1.6 2.1 2.8

Select ing a cool ing system

To se lect a c oo ler for your application, the following da ta is required:

Heat rejection: Alternative terminology is dissipation

Oil flow: Circulating oil flow determines the cooler size

Oil inlet temperature: Tempe rature of the oil entering the c ooler

Cooling air flow temperature: Air temperature at cooler face before entering matrix

100

0.3

Oil flow [l/min]

p[bar]

5025

0.32

75Oil flow [l/min]

P shrETD T4

1. Determinati on of input data

Preq [kW] Heat rejection

VOil [l/min] Oil flow

TOil [C] Oil inlet te mpera ture

Tcaf[C] Cooling air flow temperature

2. Specif ic heat reject ion

ETD [K] = TOil - Tcaf Entering Tempe rature Difference

Prshr [kW/K] = Preq/ ETD required specific heat rejection

3. Select according to di agram

Pshr/ETD [kW/K] ac tual spec ific heat rejection

P = (Pshr/ETD) x ETD ac tual heat rejection

4. Pressure drop /Oil temperature diff erence

Obtain pressure drop @ 30 cST oil visco sity from d iagram

on pa ge 8. To ca lculate for other oil viscos ities plea se us e

example on page 11.

TOil [C] = 33 x P[kW] / VOil[l/min]

5. Results

, cSt

R o l l i n g P l a n t s , S l a b S h e a r s , S c r a p S h e a r s , T r a n s p o r t E q u i p m e n t , V a c u u m P u m p s , A g r i c u l t u r e C h a f f c u t t e r s , C o m b i n e s , F o r e s t r y M a c h i n e s , H a r v e s t M a c h i n e s , T r a c t o r s

Example

P req = 12 kW

VOil = 50 l/min

TOil = 70 C

Tca f = 30 C

ETD [K] = TOil - Tca f = > 70 C - 30 C = 40 C (= 40 K)

P rshr = P req/ETD = > 12 kW /4 0 K = 0.3 kW/K

P shr /ETD = 0.3 2 kW/K (>= P rshr = 0.3 kW/K)=>T4

P = 0.32 kW/K x 40 K = 12.8 kW

TOil = 33 x (12.8 kW /50 l/min) = 8.4 C

selected cooler T4: heat rejection 12.8 kW,oil temperature difference 8.4 C,

pressure drop 0.3 bar

T4

50 150

T Cooler AKG

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