Hi,
the LRP i encountered (Gardner Denver aka Nash aka Elmo) do have liquid inside the casing, because it acts as the "piston" pumping the air.
Cavitation can occur, if the temperature of the air is much higher than the temperature of the liquid, in which case some local cavitation takes...
Hi folks,
another thing: the noise is probably from cavitation, which is dependent on the temperatures in the pump.
What temperature is your "vacuum" and what temperature is your seal water ?
Important is, that the temperature of your seal water is as low as possible, which helps in volume...
Hi folks,
for a pilot plant we are looking for a compressor which is able to handle Nitrogen at 400 °C.
V = 50 m³/h
dP = 100 mbar minimum
I was not able to track down a supplier of such a device, any hints ?
thank you
Alex.
Hi folks,
i'm in need of some advice:
a customer of our's is having troubles with his big-bag station. He fills 700-800 kg of grinded sulphur from a 1000 kg big bag to another big bag.
Again and again dust explosions occur.
Source is the friction of the material itself, not material-wall...
Good morning MortonA,
thank you for advice, and of course is this forum no free consultancy, it wasn't even intended for consultancy, just for clarification. As you don't know the background, i will explain in a few words: a chemical engineer of different company did the calculations of flow...
Hi folks,
@EGT01: sorry for the mixup, should be Am3/h of course.
@CMA010: i calculated speed for inlet (23 bara) and outlet (3 bara) without friction and speed in pipe with friction. Last one was lowest, so i chose it as limiting factor.
I'll redo the calculation with +10% flow and use the...
Hi folks,
i have an urgent question which involves basic understanding (which i seem not to have)
Oxygen, 23 bar, 20 °C
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pipe DN20 (inner diameter 22,9 mm), 250 m long
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pressure reducer from 23 bar to 2 bar
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pipe DN50
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PSV setpoint 3 bar
What is the mass/volume flow, for which...
Hi folks,
can someone give me a number what amount of steam is used for producing 1 t PP ? For comparison.
I have here a plant with 2,8 - 3 t steam/t PP.
This includes heating.
thank you very much
Alex.
Good day folks,
i have the following question:
nominal output 18 t/h @ 12 bar saturated steam
effective output 13 t/h @ 12 bar saturated steam (very old and bad maintained boiler)
Steam is reduced to 10 t/h 6 bar, 1 t/h 3 bar and 2 t/h 12 bar.
If i exchange the 12 bar steam with a thermooil...
Hi folks,
after successfully (with the help of this forum - thanks) designing a new valve, we wanted to check the existing valve [1].
But there is afaik no data.
The valve casing is cast iron with cast labelling:
1. side
DN 65
DN 40
24 82
F4410
2. side
GL V(M/H/N) 05KS
3...
Hi Latexman,
thank you for your answer.
This compares very well. The (so far) selected nozzle has a diameter of 60 mm at the narrowest point. alpha is 0.7.
Follow-up question:
Boiler spec is 14000 kg/h. Piping is about 150 m with several bends and so on to the VC. what mass flow is the...
Hi folks,
we have the following problem:
existing tank has inlet line DN65 with a CV. Before this CV there is saturated steam with 22 bar@theoretical 14 t/h. The tank is designed for 12 bar.
We are designing now the PSV for the tank. Failure case is broken CV.
regarding the inlet pressure...
