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Dear all, I am looking for manufacturers of transparent pipes for "high pressure" applications. Typically up to max. 30 bar. Flow typically 100 kg/h. Typically 20 mm to 40 mm (millimeter) diameter for the pipes. We have a non-transparent, viscous product containing hard crystalline salts, so...

Dear all, Does anyone has a simple (DYNAMIC) model (massbalance) of a gas - liquid mixer? So, liquid stream and gas stream as input and two-phase mix-flow as output. Help is appreciated, CARF

Dear all, Does anyone has a (DYNAMIC) model (+ massbalance) of a gas - liquid mixer? liquid stream and gas stream as input and two-phase mix-flow as output Help is appreciated, CARF

Hi, This link with a static evaporator model may help for basic understanding. Link I can sent you a report and some Simulink files to make a first start for a dynamic model. Simulink is a product from the MathWorks (see other forums). Regards, CARF

Dear all, Here are "all" equations, including the iterative algorithm of Colebrook-White. Link A freeware fluid flow calculator based on these equations can be downloaded on bottom of the webpage. Or a direct web application: Link Hope this helps to solve your problem, CARF

No I work in R&D and want to test the system, but would like to know if it is worth the effort at all ...

Dear all, Does anyone of you has practical experience with the systems from Artesis? The unique Artesis intelligent predictive maintenance system is suitable for most electric motor-driven equipment, as well as generators. It diagnoses a very wide range of electrical and mechanical faults...

Dear all, I found this sensor to measure Humidity in Hydrogen Peroxide (H2O2) Atmospheres (for sterilization purposes). The use of hydrogen peroxide (H2O2) as a sterilising agent in healthcare and production processes is extremely important to health and safety and has been growing in recent...

That's a very nice hit, Dave! Thank you, CARF

Perhaps it's better to apply an vortex flowmeter for this: http://www.controleng.com/article/CA186388.html good luck, C.

Dear Dave, That's a very good question, I realised there is no such thing as in-line density of a powder. I depends on the ratio of the particles to the transport medium. The off-line measurement gives 30 kg/m3, but that also depends on the bulk stacking. If we transport the powder it may...

Dear all, Does anyone of you know manufacturers of in-line measuring systems for density of powders? The powders we produce typically have a density of 30 kg/m3. We want to measure (and control) in-line density. Many thanks, CARF

Dear all, We encounter increasingly vibrations over a period of 12 hours on hour decanter centrifuge. Probably the machine gets fould because after a hot water flush (cleaning) the oscillations dissapear. Does anybody has experience with this and how to solve it? Typically we want to run much...

Dear all, We are thinking of applying a frequency inverter to a motor wich controls the liquid level in a vacuum condenser (through a centrifugal pump). Has anybody experience with VSD-drive level control in an industrial vapour condenser? Many thanks for sharing knowledge, CARF

DOWNLOAD PRACTICAL PROCESS CONTROL BOOK @ http://carf.ariesplace.com/pressure_drop_calculator/download/Practical%20Process%20Control.pdf Good luck, PS. From practice I know deadtime like these (distance/velocity-lags) are very difficult to control. A by-pass line, by-passing the big tanks...

THE SHUT IN TEST IS DONE WITH THE PUMP FULL OF FLUID. We will do a Waros said and let you know the results. We will install a pressure gauge at the discharge of the pump. So we will measure pump power take up and pressure at several valve settings. Best regards and thanks for helping, CARF

Thanks, good idea, We MEASURED current at full load (water pumping): Current was 62 Ampere. So the power take up was SRT(3) * 380 * 62 * 0.85 = 34.7 kW So say 35 kW. Indeed we could do the same at zero load (no water, pump and motor running)only meachanical load. Will the pump survive a...

Dear all, I feel my thread is being hijacked ; ). To give you all some more detail: Yes, we tried a Controlotron Ultra Sonic flowmeter. But I guess the pipe was rusted on the inside so I did not get any signal. With new pipes and well develloped flows it works well. To be more precisely: The...

Dear all, Thank you very much for thinking with me. Yes the power we did through the above equation. What we will do is simple but time consuming, we will disconnect the pipe at the very end and collect the water in a buffertank. Volume increase / time will hopefully give us a good value of the...