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2. 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 ...

3. Variable-frequency drive - Wikipedia

   en.wikipedia.org/wiki/Variable-frequency_drive

   Small variable-frequency drive Chassis of above VFD (cover removed). A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, variable voltage variable frequency drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the ...

4. Pentair - Wikipedia

   en.wikipedia.org/wiki/Pentair

   Pentair plc (PNR) is an American water treatment company incorporated in Ireland with tax residency in UK, with its main U.S. office in Golden Valley, Minnesota. [6] Pentair was founded in the US, with 65% of company's revenue coming from the US and Canada as of 2017.

5. Spare part - Wikipedia

   en.wikipedia.org/wiki/Spare_part

   Capital parts are typically repaired or replaced during planned overhauls/scheduled inspections. As description implies, these Capital Parts are typically expensive and are depreciated over time. Examples of capital parts include pumps and motor sets used in industrial plants, or impeller or a rotor required for a pump or motor. This “spare ...

6. Netanyahu's prostate removal surgery was a success ... - AOL

   www.aol.com/israels-netanyahu-undergo-prostate...

   Netanyahu is among older world leaders including President Biden, 82, President-elect Donald Trump, 79, and Pope Francis, 88, who have come under scrutiny for their age and health issues.

7. Submersible pump - Wikipedia

   en.wikipedia.org/wiki/Submersible_pump

   A 0.75 HP bore-well submersible pump which had been used to pump groundwater One style of submersible pump for industrial use. Outlet pipe and electrical cable not connected. A submersible pump (or electric submersible pump (ESP) is a device which has a hermetically sealed motor close-coupled to the pump body. The whole assembly is submerged in ...