Are there vacuum pumps that can achieve a vacuum level below -0.1 MPa?
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We are currently distilling a substance with a boiling point above 300°C. We use steam distillation, with the steam temperature around 270°C; a vacuum level of below -0.1 MPa is required. Are there any good vacuum pumps that you can recommend? The vacuum level we currently have is just barely above -0.1 MPa.
Haven’t seen it. As long as the requirements are met, there is no need to choose equipment with excessive redundancy.
You are referring to gauge pressure, which is 0.1 MPa relative to the local atmospheric pressure at that time. Vacuum pumps generally have two values: the volume of air drawn per unit time and the ultimate vacuum level. When expressing the ultimate vacuum level, it is not possible to use atmospheric pressure as a reference, as atmospheric pressure fluctuates
-0.1 MPa is already a vacuum condition; I’ve never seen a vacuum pump capable of achieving an even lower pressure I’m not sure what pressure level is required for your manufacturing process
Bro, the maximum pressure limit of the vacuum pump is -0.1 MPa. This is because the medium we use is water, and when the saturated vapor pressure of water reaches -0.1 MPa, it boils, which leads to a loss of vacuum. So if you want a lower pressure, you just need to replace the medium used in the vacuum pump with oil
-A vacuum of 0.1MPA – come and take a look at the experts’ explanations.
We may not be professional enough; I’m referring here only to gauge pressure. The vacuum level in the system needs to be below 133 Pa absolute, but the vacuum pump we purchased claims to be able to achieve a vacuum level below 50 Pa absolute – yet it fails even to reach 133 Pa absolute. I would like to ask if there are any better vacuum pumps available Thank you
Two points need to be clarified: 1) Is it possible for steam at 270 degrees to raise the temperature of the material to over 300 degrees? 2) When the vacuum level is high, gauge pressure is generally used, such as X Pa or X mbar. According to standard logic, 1013 mbar of atmospheric pressure equals 0.1013 MPa abs; -0.1 MPa equals 13 mbar abs, which is 1300 Pa. Therefore, the degree of vacuum is not very high. At the same time, 1013 mbar abs represents the pressure at an altitude of 0 m; cities such as Xi’an and Lanzhou have an atmospheric pressure that is less than 1013 = 0.1013 MPa abs.
Please take a close look: we are dealing with steam at 270°C, as well as materials at temperatures above 300°C. What we need is distillation under high vacuum, not atmospheric pressure distillation
Your operating condition seems to be related to oils; generally, a vacuum level of 133 Pa is required as the ultimate vacuum value. I would recommend using this oil-free vertical vacuum pump, whose maximum vacuum level per pump is within 50 Pa. But it is estimated that for this operating condition, a Roots vacuum pump needs to be added to increase the pumping capacity. For assistance, please call 18653370285 or visit www.sdtlhs.com
The ultimate measurement pressure of a vacuum system and the actual pressure used in the process are two entirely different concepts, with flow rate being the most critical factor! In the design of the vast majority of vacuum systems, the nominal flow rate specified is the maximum flow rate; the flow rate at the operating pressure point is completely insufficient to meet the requirements of the process gas – which results in the inability to achieve the required pressure during actual use