Catalogue 2013 - Bürkle GmbH
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Catalogue 2013 - Bürkle GmbH

Catalogue 2013 - Bürkle GmbH Catalogue 2013 - Bürkle GmbH

buerkle.de
10.07.2015 Views

Viscosity of liquidsThe right pump for each liquidPumps are used in widely different fields of application. Bürkle offersa large number of different versions. However, when choosing asuitable pump several criteria must be considered. The most importantare the viscosity, structure and density of the liquid.How the liquid behaves under the influence of external influences,e.g. variations in temperature and pressure, is also important.We would be pleased to help you make certain that you choose thecorrect pump for your application.Viscosity using motor oil as an exampleEveryone has heard of the viscosity terms for motor oil. This classificationis based on the flow behavior of the motor oil as a function ofthe temperature. In Winter low-viscosity oils are required. In Summerthe oil becomes hotter, but it must still remain sufficiently thick.For example: SAE 5W-40. The first number defines the viscosity at0 °F (-18 °C), the second for a temperature of 210 °F (99 °C). An oilwith the classification 5W (W=Winter) is therefore thinner than a15W motor oil under cold conditions.Viscosity – what actually is viscosity?The viscosity characterizes the flow behavior of a liquid. Highviscosityliquids are thick, low-viscosity liquids thin. This viscosityresults from intermolecular forces; these are also known as theinternal friction. This internal friction decreases as the temperatureincreases and increases as the temperature decreases.The dynamic viscosity is given in Pas, for low-viscosity liquids in mPas.It is defined as the force in newtons that is necessary to displace aliquid layer of 1 m 2 and 1 m height along a boundary parallel to asecond layer at a speed of 1 m·s -1 .Typical viscosity values in mPas at 20 °CKerosine 0,65Coffee cream ~ 10Hydraulic oil ~ 120Water 1,0Glycol 40Motor oil 15W40 390Grape juice 2 – 5Olive oil ~ 100Honey ~ 10 00041

Stopcocks | completely water-tight, easily operated21The StopCock discharge cocks fits allcontainers with R 3/4“ connectionthreads. Thread adapters facilitate connectionof cocks to nearly all containers. Tight-closing for complete seal Especially effortless With connecting cap nut, guaranteedvertical position of the cock Pressure-resistant up to 2 bar at20 °C (without discharge bracketand grommet)Stopcock angled With discharge angle and rotatablespout preventing drips With tapered spout for bottles withnarrow openings with a diameterfrom 6 to 8 mm. Media-contacting parts PP, PE andPTFENot suitable for solidifyingsubstances!Thread, inflowing side Thread, outflowing side Price € Quantity scale from Scale price € Item no.1 3/4’’ inner thread cap nut spout/nozzle 20.30 10 18.15 0525-1000 N4Stopcock straight-throughThread, inflowing side Thread, outflowing side Price € Quantity scale from Scale price € Item no.2 3/4’’ outer thread 3/4’’ outer thread 22.45 10 20.35 0525-3000 N43 3/4’’ inner thread cap nut 3/4’’ outer thread 20.15 10 18.20 0525-5000 N44 3/4’’ inner thread cap nut 3/4’’ inner thread cap nut 23.90 10 21.75 0525-7000 N453 4AccessoriesVarious designs of the stopcock.Connecting thread3/4” with union nut or externalthreadDescription Price € Item no.5 Hose nozzle StopCock 4 mm 8.95 0525-1304 N4Hose nozzle StopCock 6 mm 8.95 0525-1306 N4Hose nozzle StopCock 8 mm 8.95 0525-1308 N4Hose nozzle StopCock 10 mm 8.95 0525-1310 N4Hose nozzle StopCock 12 mm 8.95 0525-1312 N4Hose nozzle StopCock 16 mm 8.95 0525-1316 N4Discharge angle 7.70 0525-1400 N442www.buerkle.de | info@buerkle.de | Hotline +49 (0) 76 35 8 27 95-0

Stopcocks | completely water-tight, easily operated21The StopCock discharge cocks fits allcontainers with R 3/4“ connectionthreads. Thread adapters facilitate connectionof cocks to nearly all containers. Tight-closing for complete seal Especially effortless With connecting cap nut, guaranteedvertical position of the cock Pressure-resistant up to 2 bar at20 °C (without discharge bracketand grommet)Stopcock angled With discharge angle and rotatablespout preventing drips With tapered spout for bottles withnarrow openings with a diameterfrom 6 to 8 mm. Media-contacting parts PP, PE andPTFENot suitable for solidifyingsubstances!Thread, inflowing side Thread, outflowing side Price € Quantity scale from Scale price € Item no.1 3/4’’ inner thread cap nut spout/nozzle 20.30 10 18.15 0525-1000 N4Stopcock straight-throughThread, inflowing side Thread, outflowing side Price € Quantity scale from Scale price € Item no.2 3/4’’ outer thread 3/4’’ outer thread 22.45 10 20.35 0525-3000 N43 3/4’’ inner thread cap nut 3/4’’ outer thread 20.15 10 18.20 0525-5000 N44 3/4’’ inner thread cap nut 3/4’’ inner thread cap nut 23.90 10 21.75 0525-7000 N453 4AccessoriesVarious designs of the stopcock.Connecting thread3/4” with union nut or externalthreadDescription Price € Item no.5 Hose nozzle StopCock 4 mm 8.95 0525-1304 N4Hose nozzle StopCock 6 mm 8.95 0525-1306 N4Hose nozzle StopCock 8 mm 8.95 0525-1308 N4Hose nozzle StopCock 10 mm 8.95 0525-1310 N4Hose nozzle StopCock 12 mm 8.95 0525-1312 N4Hose nozzle StopCock 16 mm 8.95 0525-1316 N4Discharge angle 7.70 0525-1400 N442www.buerkle.de | info@buerkle.de | Hotline +49 (0) 76 35 8 27 95-0

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