What is a diffuse pump?

Diffusion pump is a device designed to draw high -speed steam as a transport medium. This process occurs due to the fact that the gases resist diffusion in the steam stream and are more inclined to move with it. Diffusion pumps are characterized by very low operating pressures or, more precisely high vacuum values ​​that can reach 10-10 mbar. Steam used for gas transport is usually a product of boiling of specialized oils such as silicone oil in the pump heating section. When directed by the pump assembly, the steam accelerates significantly and attracts the gas out through the pump drain point.

The characteristics of the gases that support the operation of the diffusion pump is their tendency to distract or mix the jet of steam, but rather moves with it. This can clearly see where the steam leaves the window or flue. As it does, it moves with it with a column of air, and thus causing air circulation in space. Although it is somewhat modest, it isThe good example of the concept of the diffusion pump at work. However, the main difference between the operation of the pump and the cold breeze in the bathroom is the speed at which steam moves. In order to achieve its full potential, steam used as a transport medium accelerates to extremely high speed.

Diffusion pumps are very simple devices without moving parts; This makes them particularly long lives and are easy to maintain. The main slices on a typical example consist of a heater section where steam is produced, a pumping gas input, a range of nozzles and outputs. Secondary elements consist of cooling coils and returning oil. The steam material is heated to the boiling point in the heating section, while the resulting steam is directed to the nozzle section. There he / she steps before handing over the drawn input of the gas, where it attracts the gas to the output channel.

In the outlet channel, steam is cooled and again on the liquidto get. The accelerated gas then leaves the inner part of the pump, where it returns to atmospheric pressure and is discharged. The zocondensing oil flows back into the heater section. The steam materials in the diffusion pump are usually silicone -based oils, although mercury is often used in sensitive laboratory applications where oil contamination is undesirable.