This type of pump is a spool - type mechanical pump, and it is one of the vacuum equipment for extracting general gases or a small amount of condensable gases (a gas ballast device should be used).
The performance specifications of this type of pump: the pumping speed is 30 liters per second, and the ultimate pressure is 8×10¹ Pa. It is suitable for vacuum smelting, vacuum drying, vacuum impregnation, high - altitude simulation tests, and other vacuum operations. It can be used alone or as a fore - pump for other vacuum pumps. However, when extracting gases with high oxygen content, explosiveness, corrosiveness to ferrous metals, chemical reactions with vacuum oil, and dust, other devices should be attached.
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