Vacuum mechanical booster

In many cases, multistage vacuum pumps consume less energy than single-stage pumps while doing the same job. Power requirements may be reduced as much as 50%. Rotary blowers are often called mechanical booster pumps because they are commonly used as a first stage in a multistage system. 

FIGURE 6.36 (a) Pump-down factor for single-stage and compound vacuum pumps (b) pump-down factor tor mechanical booster and backing pump. (After Kinney Vacuum Division, The New York Air Brake Co., and VanAtta.)... 

When the torpedo was ejected, it rushed thru the water and this spun a small turbine. This, in aim, operated a gear train that pushed the detonator into the booster car vity. The 450 yards of travel of the torpedo required for this operation gave the vacuum tubes within the mechanism time to warm up... 

Booster pump (vacuum technology) A pump used between the high vacuum pump (particularly the diffusion pump) and the backing pump in order to increase the throughput in the medium vacuum range and decrease the volumetric flow through the backing pump. Example Diffusion pump (DP) exhausts into a Roots blower (booster pump) then into an oil-sealed mechanical pump. See also Vacuum pump. 

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