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  2. Vacuum ejector - Wikipedia

    en.wikipedia.org/wiki/Vacuum_Ejector

    A vacuum ejector, or simply ejector, or aspirator, is a type of vacuum pump, which produces vacuum by means of the Venturi effect.. In an ejector, a working fluid (liquid or gaseous) flows through a jet nozzle into a tube that first narrows and then expands in cross-sectional area.

  3. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    In situations where a downward slope out of a building en route to a treatment system cannot be created, a special collection sump pit and grinding lift "sewage ejector" pump are needed. By contrast, potable water supply systems are pressurized up to 50 pounds per square inch (340 kPa) or more and so do not require a continuous downward slope ...

  4. Injector - Wikipedia

    en.wikipedia.org/wiki/Injector

    It is a fluid-dynamic pump with no moving parts except a valve to control inlet flow. Depending on the application, an injector can also take the form of an eductor-jet pump, a water eductor or an aspirator. An ejector operates on similar principles to create a vacuum feed connection for braking systems etc.

  5. Glossary of firefighting equipment - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firefighting...

    A Variable Speed (VFD) Fire Pump Controller is a fire pump controller that is able to vary the speed of the motor depending on the demand of the fire pump, resulting in the ability to hold a constant discharge pressure. Ventilation saw A high-powered saw with metal-cutting teeth or disc for quickly making large openings in roofing materials.

  6. Vacuum pump - Wikipedia

    en.wikipedia.org/wiki/Vacuum_pump

    The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]

  7. 9 mobile apps to help balance your life in 2025 - AOL

    www.aol.com/9-mobile-apps-help-balance-175059515...

    Whether you promise to meditate more, streamline your workdays or find a creative outlet, these apps can help you make 2025 the best year ever.

  8. NYC woman murdered 33 years ago finally ID’d as ... - AOL

    www.aol.com/nyc-woman-murdered-33-years...

    The final suspect pleaded guilty in February of 1993 to hindering prosecution and received a sentence of 1 ½ to 4 ½ years in prison. He was also released to parole in 1996 and ultimately ...

  9. Convicted murderer who escaped a Mississippi prison on ...

    www.aol.com/manhunt-underway-convicted-murderer...

    A convicted murderer who escaped from a Mississippi state prison on Christmas Eve was captured Wednesday, according to a Mississippi Department of Corrections post on Facebook.