Vacuum pump selection
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I need to set up a vacuum evaporation apparatus for aqueous solutions, and this will require a vacuum pump with an evacuation rate of around 1000 L/min. I’m initially considering rotary vane pumps; I would appreciate it if experts could recommend some brands. Of course, other types of pumps are also acceptable
Edward’s is obviously amazing. Is it appropriate for the oil pump to draw water? If too much water is drawn, the hydraulic oil will be damaged
So, which type would be the most suitable? I’d appreciate some recommendations
For pumping water, a water ring pump is a good choice – it has high power, low costs, is easy to maintain, and the required vacuum level isn’t very high. One can take as a reference the type of pumps used in multi-effect evaporation systems and other vacuum reduction devices
This post was last edited by Desert Fish on 2015-8-18 09:52. It is recommended to use claw pumps (dry vacuum pumps); there is a comparison between claw pumps and diaphragm pumps, as well as a comparison of their advantages and disadvantages at http://wenku.baidu.com/link?url=...xVWAf_D73XkJFYiWPYa. For more details, feel free to contact me
Agree with the person above; if the gas being pumped does not contain non-condensable gases, it is recommended to use a claw-type vacuum pump or a vacuum unit
If there is no non-condensable gas, a dry-type system can be considered, but I recommend a water-ring type
Claw pumps (dry vacuum pumps) are suitable for high vacuum levels; a distillation apparatus equipped with such pumps is considered very sophisticated. It is recommended to use a vertical oil-free vacuum pump! If the evaporated material does not produce wastewater when in contact with water, then a water jet pump is still the better choice
The water ring vacuum pump is probably the best choice
The poster can first determine based on the operating conditions whether there is a large amount of liquid involved, and if so, whether further treatment is necessary, in order to decide whether to use a dry pump, a vane pump, or a water-jet pump. Dry pumps generally require that the amount of liquid present be as low as possible; the less, the better. Water ring or water-jet pumps, on the other hand, have no such requirement. Additionally, the poster didn’t mention the requirements regarding vacuum level. If a high vacuum level is required, dry pumps are more suitable (dry screw vacuum pumps can achieve vacuum levels of several pascals as a maximum). Of course, there are many types of dry pumps, and the choice depends on factors such as the composition and properties of the medium involved in the process. The original poster can also search on Baidu; there are many online comparisons of different vacuum pumps available, and replies and discussions can also be carried out within the forum.