Technical Information Berendsen

8/12/2019 Technical Information Berendsen

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TECHNICAL INFORMATION

The product information and specifications within this catalogue should be viewed as a guide onlyand are subject to change without notice. Please refer to inside front cover for further details.

327

Conversion FactorsHydraulic FormulaeRecommended Cleanliness Code ChartPipe Pressure RatingsPressure Drop in PipesOil Viscosity/Temperature Chart

328330331333334335


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328

.13556

.011301.1

.9806

daN-m

1.356.1130

101

9.806

N-m

.1382.011521.019.102

1

kg-m

121

88.518.85186.80

in-lb

1.083337.376.7376

7.2359

ft-lb

3.61.097

11.609

.01829

2.237.6818.6214

1.01136

196.8560

54.68881

3.2811

.91131.467

.01667

1.3048.2778.4470

.00508

m/s

CONVERSION FACTORS

TORQUE

.0068951.1

.0019.807

.09807

MPa

.06895101

.0198.07.9807

bar

6.8951000100

1980798.07

kPa

.0007031.102

.0102.000102

1.01

kg/mm 2

.0703110.201.02

.0102100

1

kg/cm 2

1145

14.50.145142214.22

psi

PRESSURE

1 Atmosphere = 14.7 lb/in 2

1 Atmosphere = 29.92 inches of Mercury1 Atmosphere = 33.96 ft of water1 inch of Mercury = 0.491 lb/in 2 = 13.6 inches of water1 psi = 2.0416 inches of Mercury at 62F

1.3569.806859.9641.2.113

J

.13831

87.6965.39

.01152

kg-m

.0016.011

1.7457

.00013

kW-hr

.002

.0151.341

1.00017

hp-hr

1286.80

7609.75675.7

1

in-lb

17.233634.1472.9.0833

ft-lb

ENERGY

1 Btu = British thermal unit = heat required to raise temperature of 1 lb of water 1F

1 Btu = 778.57 ft-lb

VELOCITY

ft/s km/hr mph ft/min


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LENGTH

.10201.020

1.4536

.2242.242.20

1

110

9.8074.4482

N kg lb

FORCE AND WEIGHT

6.4521

.01

645.2100

1

1.1550

.001550

in 2 cm 2 mm 2

AREA

.3048

.02541

.01

m/s 2

30.482.54100

1

cm/s 2

121

39.373937

in/s 2

1.083333.281

.03281

ft/s 2

ACCELERATION

.3937

112

39.3739,37063,360

in

.03281

.083331

3.28132815280

ft

.01

.02778.3048

110001609

m

.00001

.000027.0003.001

11.609

km

.000006

.000017

.000186

.000621.6214

1

mi

1

2.5430.48100

100,000160,934

cm

.01639

.00011

.9463

L

.0173

.00101.05

1

qt

16.39

11000947

cm 3

1

.0610261.0257.75

in 3

1 U.S. gallon = 231 in 3

1 U.S. gallon = 0.13368ft 3

1 gpm = 3.85 in 3 /S1 gpm = 3.79 L/min (liquid)

VOLUME


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TEMPERATURE

F = (C x 1.8) + 32C = (F - 32 ) 1.8

.7457

1.7355

1.014

1.3601

1

1.341.9863

hp kW met-hp

1 hp = 550 ft-lb/s1 hp = 33,000 ft lb/min1 hp = 42.44 Btu/min

HYDRAULIC FORMULAE

FOR HYDRAULIC PUMPS

Input Power (kW) = Flow (L/min) x Pressure (Bar)

600

FOR HYDRAULIC MOTORS

Output Power (kW) = Torque (Nm) x Speed (rpm)

9549

Shaft Torque (Nm) = Pressure (Bar) x Displacement (cm 3 /rev)

62.8

Shaft Speed (rpm) = Flow (L/min) x 1000

Displacement (cm 3 /rev)

FOR HYDRAULIC CYLINDERS

Force (N) = Area (mm 2) x Pressure (Bar)

10

Speed (mm/sec) = Flow (L/min) x 21,220

Diameter 2 (mm 2)

Where Area (mm 2) = Diameter 2 (mm 2) x 0.7854

Output Flow (L/min) = Displacement (cm 3 /rev) x Speed (rpm)

1000

POWER


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RECOMMENDED CLEANLINESS CODE CHART

PUMPS

20.18.1520.18.1519.17.1518.16.1418.16.14

19.17.1519.17.1418.16.1417.15.1317.15.13

18.16.1317.15.13

16.14.12


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How to Set a Target Cleanliness Level

Step One

Using the Recommended Cleanliness Code Chart, determine the cleanest fluid (lowest

code) required by any component in the system. All components that draw fluid from acommon reservoir should be considered to be part of the same system even if theiroperations are independent or sequential (i.e. a central power unit running severaldifferent machines). The pressure rating for the system is the maximum system pressureachieved by the machine during a complete cycle of operation.

Step Two

For any system where the fluid is not 100% petroleum oil, set the target one Range Codecleaner for each particle size. Example: If the cleanest code required was an 17.15.13 andwater glycol is the system fluid, the target becomes 16.14.12.

Step Three

If any two of the following conditions are experienced by the machine or system, set thetarget cleanliness one level lower for each particle size.

Frequent cold starts at less than 0F (-18C)Intermittent operation with fluid temperatures over 160F (71C)High vibration or high shock operationCritical dependence on the system as part of a process operationPersonal safety of the operator or others in the area could be put at risk by a systemmalfunction

Again, looking at the example above, if this system was expected to cold start in Alaska

and a failure could cause personal injury, the target cleanliness would become 15.13.11.Using this three step procedure the system target cleanliness code for the system is now set.

Test Stands

Target cleanliness level for test stands should be one range code cleaner, for each particlesize, than the code for each particle size, than the code for the most sensitive conditionand component to be tested. Example: Variable piston pump tested at 2500 psi cleanlinesslevel should be 17.15.13 so the TEST STAND cleanliness level should be at least 16.14.12.

Fluid Conditioning

Proper fluid condition is essential for long and satisfactory life of hydraulic componentsand systems. Hydraulic fluid must have the correct balance of cleanliness, materials andadditives for protection against wear of components, elevated viscosity and inclusion of air.


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Working pressures for various schedule pipes are obtained by dividing burst pressure by the safety factor.

PIPE PRESSURE RATINGS

Pipes Currently are Sized by Schedule Number

.405

.540

.675

.8401.0501.3151.660

1.9002.3752.8753.5004.0004.5005.5636.6258.625

10.75012.750

.269

.364

.493

.622

.8241.0491.380

1.6102.0672.4693.0683.5484.0265.0476.0657.981

10.02011.934

.215

.302

.423

.546

.742

.9571.278

1.5001.9392.3232.9003.3643.8264.8136.7617.6259.564

11.376

.466

.614

.8151.160

1.3381.6892.1252.624

3.4384.3135.1896.8138.500

10.126

.252

.434

.599

.896

1.1001.5031.771

4.063

1/81/43/81/23/411 1/4

1 1/222 1/233 1/245681012

Inside DiameterPipe O.D. Schedule 40 Standard Schedule 80 Extra Heavy Schedule 160 Double Extra HeavyNom. Size

Pressure Rating of Pipes

0.4050.5400.6750.840

1.0501.3151.6601.9002.3752.8753.500

27181814

1411 1/211 1/211 1/211 1/2

88

.364

.493

.622

.8241.0491.3801.6102.0672.4693.068

16,00013,50013,200

11,00010,0008,4007,6006,5007,0006,100

.302

.423

.546

.742

.9571.2781.5001.9392.3232.900

22,00019,00017,500

15,00013,60011,50010,5009,1009,6008,500

.466

.614

.8151.1601.3381.6892.1252.634

21,000

21,00019,00015,00014,80014,50013,00012,500

.252

.434

.599

.8961.1001.5031.771

35,000

30,00027,00023,00021,00019,00018,000

1/81/43/81/2

3/411 1/41 1/222 1/23

Schedule 40Standard

Schedule 80Extra Heavy Schedule 160

DoubleExtra Heavy

NominalPipe

Size in.

OutsideDiameterPipe in.

Number ofThreadsper Inch

0.260.400.410.53

0.550.680.710.720.761.141.20

Lenght ofEffective

Threads in. Pipe ID inBurst

Press psi Pipe ID in.Burst

Press. psi Pipe ID in.Burst

Press. psi Pipe ID in.Burst

Press. psi


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PRESSURE DROP IN PIPES

Example

Q = 80 l/min, pipe 22/19

Pressure drop per meter pipeline is searched for.A line is drawn from d 1 - 19mm through Q = 80 l/mIt crosses the Re-line in the turbulent area, and the result can be read on the turbulentscale.

p = 0.23 bar x m(If the Re-line is in the laminar area, the result is to be read on the laminar scale).The nomographic chart applies to the viscosity25 cSt 3.5E and the density 900 kg/m 3

At another viscosity a correction is to be made as follows:-

Turbulent flow: Laminar flow:

p = x p nomogr

v = the oil viscosity in cStAt another density a correction is to be made as follows:

= the oil density in kg/m 3

vVnomogr

p = x p nomogrv

Vnomogr

p = x p nomogr nomogr


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OIL VISCOSITY / TEMPERATURE CHART


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Notes:


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Notes:


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Notes:

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