backing pump meaning in Hindi

Examples

1. Multiple turbomolecular pumps in a lab or manufacturing-plant can be connected by tubes to a small backing pump.
2. Because turbomolecular pumps only work in molecular flow conditions, a pure turbomolecular pump will require a very large backing pump to work effectively.
3. Thus, many modern pumps have a molecular drag stage such as a Gaede mechanism near the exhaust to reduce the size of backing pump required.
4. Automatic valves and diffusion pump like injection into a large buffer-tube in front of the backing pump prevents any overpressure from one pump to stall another pump.
5. As a result, it is possible to use much smaller backing pumps than would be required by pure turbomolecular pumps and / or design more compact turbomolecular pumps.
6. It may also be necessary to change the oil in the interface roughing pump as well as the vacuum backing pump, depending on the workload put on the instrument.
7. In most cases, the exhaust is connected to a mechanical backing pump ( usually called roughing pump ) that produces a pressure low enough for the turbomolecular pump to work efficiently.