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2. Variable speed fire pump controller - Wikipedia

   en.wikipedia.org/wiki/Variable_speed_fire_pump...

   Variable Speed Fire Pump Controllers were invented and released with a UL Listing for fire pump service in 2003 by Master Control Systems, Inc. [1] [2] Paragraph 10.5.5 in the 2003 edition of NFPA-20 recognized Variable Speed as an accepted method for operating the fire pump. Then in the NFPA-20 2007 edition, section 10.10 was added to clarify ...

3. Affinity laws - Wikipedia

   en.wikipedia.org/wiki/Affinity_laws

   The affinity laws (also known as the "Fan Laws" or "Pump Laws") for pumps/fans are used in hydraulics, hydronics and/or HVAC to express the relationship between variables involved in pump or fan performance (such as head, volumetric flow rate, shaft speed) and power. They apply to pumps, fans, and hydraulic turbines. In these rotary implements ...

4. Hydraulic ram - Wikipedia

   en.wikipedia.org/wiki/Hydraulic_ram

   The water in the inlet pipe [1] starts to flow under the force of gravity and picks up speed and kinetic energy until the increasing drag force lifts the waste valve's weight and closes it. The momentum of the water flow in the inlet pipe against the now closed waste valve causes a water hammer that raises the pressure in the pump beyond the ...

5. AOL

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   The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

6. Florida woman gives insane excuse for why she snatched 3-year ...

   www.aol.com/florida-woman-flimsy-excuse-why...

   A Florida woman who allegedly snatched a three-year-old boy from his fenced-in yard and ran off down the street last week told the cops she shouldn’t be arrested because she “gave it back ...

7. Variable displacement pump - Wikipedia

   en.wikipedia.org/wiki/Variable_displacement_pump

   A common type of variable-displacement pump used in vehicle technology is the axial piston pump. This pump has several pistons in cylinders arranged parallel to each other and rotating around a central shaft. A swashplate at one end is connected to the pistons. As the pistons rotate, the angle of the plate causes them to move in and out of ...