An aspirator is also known as an eductor-jet pump ,or a filter pump. T his is a device that is able to produce a vacuum by using the venturi effect. In an aspirator there is a fluid (either liquid or gaseous) that flows through a narrowing tube. Once the tube starts narrowing, the fluid's speed is able to increase. This is because of the aforementioned venturi effect. The pressure eventually decreases and from her onwards, the vacuum is taken from this point.
The most common form of this kind of chemistry laboratory apparatus is the basic, and cheap, water aspirator. This is used in both biology and chemistry laboratories and is rather simple. It consists of one tee fitting which is then attached to a faucet. It also has a hose barb at one side of it. The flow of water will pass through the straight part of the tee, which will need to have a restriction at the intersection, where the hose barb as been attached. The vacuum hose should then be connected to the barb.
If there is a liquid being used as the working fluid, then the strength of he vacuum that is produced will be limited by the vapor pressure of the liquid. So far water, for those who understand it, there is 3.2 kPa, or 32 mbar, or 0.46 psi at either 25 degrees C or 77 degrees F. If there is a gas being used, however, then the restriction will not exist. The industrial steam ejector which is more complex, and is also known as the steam jet ejector, or the steam jet aspirator, will use steam as the working fluid instead of just water. There are many kinds of this apparatus, and they are all used to create varying levels of vacuum states.
The most common form of this kind of chemistry laboratory apparatus is the basic, and cheap, water aspirator. This is used in both biology and chemistry laboratories and is rather simple. It consists of one tee fitting which is then attached to a faucet. It also has a hose barb at one side of it. The flow of water will pass through the straight part of the tee, which will need to have a restriction at the intersection, where the hose barb as been attached. The vacuum hose should then be connected to the barb.
If there is a liquid being used as the working fluid, then the strength of he vacuum that is produced will be limited by the vapor pressure of the liquid. So far water, for those who understand it, there is 3.2 kPa, or 32 mbar, or 0.46 psi at either 25 degrees C or 77 degrees F. If there is a gas being used, however, then the restriction will not exist. The industrial steam ejector which is more complex, and is also known as the steam jet ejector, or the steam jet aspirator, will use steam as the working fluid instead of just water. There are many kinds of this apparatus, and they are all used to create varying levels of vacuum states.
