Methods for controlling vacuum
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For vacuum equipment, it’s essential to know how to control the level of vacuum – what are your thoughts?
It’s only possible to reduce the vacuum level to a value lower than what the equipment can achieve; it cannot be increased. It’s easy to make the vacuum level lower – just add some air to the buffer tank, and the vacuum level will drop, haha..
As mentioned above, once the vacuum equipment is selected, its capacity and the lowest vacuum level it can achieve are determined; the system vacuum level can only be lower than this minimum value. If it is necessary to control the system vacuum level, control valves can be used for adjustment.
For this sealing system used to control vacuum, you can use either a flow controller or a pressure controller to regulate the inflow of air from an air supply source; at the same time, a vacuum pump is used to continuously draw air out in the opposite direction. This approach allows for dynamic equilibrium to be achieved, thereby allowing you to control the desired level of vacuum
There are two options: 1) Add a gas source in front of the vacuum system; in other words, the vacuum system not only draws air from the areas where it is needed but also from other areas as well. This gas source is equipped with a control valve that regulates the pressure. 2) Direct the gas that needs to be discharged after being extracted from the vacuum system back to the inlet of the vacuum system, again using a control valve for regulation
Installing a vent valve on the vacuum buffer tank can help control the level of vacuum, but the energy consumption of the motor remains unchanged. Could a variable speed drive be added to the vacuum pump in order to control the amount of air drawn out, thereby regulating the vacuum level and saving energy at the same time?
1. Control the exhaust volume by using a control valve or by frequency conversion to regulate the pump； 2. Control the amount of return air by connecting the pump outlet to the inlet via a pipeline and regulating the flow rate in this pipeline.
First, it is necessary to clarify what type of vacuum pump you are using Secondly, do you want to control the vacuum level or the amount of air being pumped out? It is necessary to consider both fluid flow rate and velocity
I’ve been troubled by this issue lately; during vacuum distillation, it’s necessary to maintain a state of gentle boiling at the liquid surface, and it takes a long time to adjust the vacuum level until an equilibrium is reached. It mainly involves manually adjusting the valves, which is very difficult. It tips over or falls short with the slightest movement, making it difficult to maintain balance. Please give me more guidance. :handshake