In the laboratory, technicians and scientists regularly use vacuum pumps for a number of tasks such as filtering, controlling, or inducing solvent evaporation in concentrators, the gel dries, vacuum ovens, rotary evaporators, etc. Most of the lab vacuums operate at vacuum levels between 1 torr and 277 torrs, a common range in which most lab applications work. Like many other lab equipment, there are various types of vacuum pumps to select from. Here are some of the types of laboratory vacuum pumps that you must know:
- Rotary vane vacuum pumps- These traditional oil-sealed rotary vane vacuum pumps are the most commonly used lab vacuum pumps as they are less costly and require minimum maintenance. Commonly known as RV, it can be used in a variety of applications and the contamination can be flushed with liquid fluids. Rotary vane pumps help in lubricating working parts using oil or inert fluids and also ensure a tight seal, as well as, remove heat, cooling the rotors in process. These pumps have very high displacement capacities and can reach deep vacuum levels.
- Diaphragm vacuum pumps- Diaphragm vacuum pump is basically a dry pump that operates using a rotating piston, which closes and opens internal diaphragms to move air. This unique feature of the diaphragm pump helps in eliminating the use of oil in vacuums. Because of its oil eliminating feature, diaphragm vacuum pumps are higher in price than rotary vanes. The vacuum levels of these pumps are not really deep and its displacement capacities are also a bit lower than other pumps.
- Hybrid or combination vacuum pumps- Hybrid vacuum pumps have both the rotary vane and diaphragm pump in a single vacuum pump. The diaphragm pump in it helps maintain the oil of the rotary vane pump under negative pressure to eliminate or reduce the amount of vapor going through the pump and condense within the oil. Hence, the hybrid pump helps in keeping the oil cleaner and saves more oil as compared to that in a rotary vane.
- Scroll vacuum pumps- These vacuum pumps make the use of two orbital scroll plates. These plates compress vapors and air and move them to the pump’s exhaust. Though the cost of scroll vacuum pumps is higher, the lifetime maintenance cost is lower than other pumps.
In this regard, you can check out LeDab vacuum pumps that are designed to serve all your unique lab needs.