Choose the right vacuum pump for your acrylic vacuum chamber
In this article, we will discuss vacuum pumps - and other devices used to generate vacuum in closed systems or chambers. We will discuss the working principles of vacuum pumps, vacuum generation, pumping and pump horsepower. The purpose of this article is to provide you with practical guidance to help you choose the right vacuum pump for the system.
In simple practice, vacuum pump is a device that can produce vacuum. Vacuum is a condition under which pressure is lower than ambient pressure; therefore, there is a pressure difference between the two systems. People often make mistakes to confuse vacuum with air pulling. In fact, pulling force is the result of vacuum, not the condition itself. Due to the pressure difference, the higher pressure system (ambient air) flows to the lower pressure system (vacuum), thus generating "air pull".
According to the ideal gas law, the pressure is proportional to the number of molecules in the closed system. This means creating vacuum by removing air molecules from closed systems such as Acrylic Vacuum Chambers.
Classification of Vacuum Pumps
It's no exaggeration to say that vacuum pumps come in all shapes and sizes and that we can access pages and pages describing each type of work. However, for practical reasons, we will focus concisely and concisely on pumps that are very suitable for acrylic vacuum chambers.
Rotary vane pump
Rotary vane pump connected to acrylic vacuum chamber
Rotary vane pump is the most popular vacuum pump for various vacuum applications. There are hundreds of different vacuum pumps. The oil seal rotary vane vacuum pump can be one stage (single stage) or two stages (double stage).
Single-stage rotary vane pump
The single-stage vacuum pump has an oil-immersed eccentric rotor. When the rotor rotates, the blade is used as a seal by sliding against the inside of the shell wall and generating positive displacement or vacuum. The final vacuum level of single stage rotary vane vacuum pump is about 0.015 Torr (15 micron).
Two-stage rotary vane pump
Two-stage rotary vane pump operates in two stages. The first stage is the pumping stage, while the second stage is the exhaust stage. This enables the two-stage vacuum pump to perform better in higher vacuum. In fact, the performance of the two-stage pump is better than that of the single-stage pump. The higher the vacuum degree - the higher the vacuum degree, the better the performance. In addition, the two-stage pump will be reduced to 0.001 Torr or 1 micron.
Advantages of Rotary Vane Pump
The main advantage is that rotary vane pumps are very popular and common and can be purchased anywhere at any price. In addition, the rotary vane pump only needs electricity to run - all you have to do is insert it into the power supply, flip the switch, look, you have some pretty good vacuum yourself. Even inexpensive two-stage pumps can reach a vacuum level of 100 microns; this is very impressive. High-end models can reach up to 1 micron. Rotary vane pump is easy to maintain and repair.
Defects of Rotary Vane Pump
Rotating vane vacuum pumps may be a little loud. Vacuum pump oil can sometimes cause confusion and inconvenience, because you need to maintain the pump and replace it as needed. High-end rotary vane pump models may cost you thousands of dollars, while cheaper models will disappear in a few months.
Another disadvantage of rotary vane vacuum pump is exhaust emission. Because oil is used to seal blades and create vacuum, internal oil mist will be generated. Then, the oil mist will be discharged and discharged around the vacuum pump. Rotary vane pumps may not be ideal solutions for clean rooms, closed rooms and laboratories, or for medical, food or FDA manufacturing environments. Fortunately, these exhaust gases can be minimized by placing the exhaust filter on the exhaust device of the vacuum pump. Please note that exhaust emissions will be minimized but not eliminated completely.
Finally, it should be noted that rotary vane pumps can be divided into two price categories: economical rotary vane vacuum pumps, which cost between $100 and $1000 in most cases, and industrial rotary vane vacuum pumps which cost between $1,500 and $15,000.