In our previous discussions, the rotary vacuum pump comes in two major types. The single and multiple variations that contain a different set of components. The focus of this article is on the second type which is the multiple rotary vacuum pumps, identifying the key components that make them work effectively.
The first one is the circumferential piston or the rotating piston which is used to move both the rotors and the fluid but in a separate time. Most of the time, there are more than one rotor that is utilized for two or more pistons. The second major part of a multiple rotary vacuum pump is the gear. It comes either as internal or external that moves the fluid and spins to transport it from the inlet to the outlet.
External gears drive the idler gear through a stationary pin. One the voids are created during the actual pumping; the fluid passes through. Then the gears spin back which reduces the volume inside the chamber. This forces the fluid into the discharge outlet. Other important components are the lobe which appears like a fidget spinner that creates continuous sealing and the screw which moves the fluid axially.
In general, a rotary vacuum pump works with the utilization of high pressure in most applications. Many users find it very advantageous because of its compact design and flexibility because it can be used for plenty of applications, from pumping gas or fluid to waste disposal purposes. This pump provides continuous flow at high differential pressure. Compared to other vacuum pumps like a centrifugal version, rotary vacuum pumps can deal with more viscosity. The biggest downturn, however, is that they deliver lower capacity. But still, they offer high efficiency, excellent flow control, and decreased energy consumption, which are enough reasons to choose it.
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