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2. Jacuzzi - Wikipedia

   en.wikipedia.org/wiki/Jacuzzi

   The water pumps were a niche medical product until they were integrated into a recreational hot tub in 1968. As the popularity of hot tubs grew, Jacuzzi created more models that were more advanced. Jacuzzi was family-run until 1979, after which it then changed hands several times, before being bought by its current owner Investindustrial in 2019.

3. Hot tub - Wikipedia

   en.wikipedia.org/wiki/Hot_tub

   The earliest hot tubs were calderas in which hot stones were placed to heat the water. [citation needed] Therma in Ikaria has been a very popular place particularly for hydrotherapy ever since the 4th century B.C. [2] The remains of wrecked marble bathtubs along with a prehistoric aqueduct that have been unearthed from this area bear ample testimony of the place's popularity in the ancient times.

4. Flexible impeller - Wikipedia

   en.wikipedia.org/wiki/Flexible_impeller

   A flexible impeller pump is a positive-displacement pump that, by deforming impeller vanes, draws the liquid into the pump housing and moves it to the discharge port with a constant flow rate. The flexibility of the vanes enables a tight seal to the internal housing, making the pump self-priming , while also permitting bi-directional operation.

5. Circulator pump - Wikipedia

   en.wikipedia.org/wiki/Circulator_pump

   The following parameters are characteristic for the circulating pumps: capacity Q, pump pressure ∆p (delivery head ∆H), energy consumption P with pump unit efficiency η, impeller rotational speed n, NPSH and sound level L. In practice, the graphical relationship between the values Q, ∆ p(∆H), P and η is used.

6. Centrifugal compressor - Wikipedia

   en.wikipedia.org/wiki/Centrifugal_compressor

   The simplest inlet to a centrifugal compressor is typically a simple pipe. Depending upon its use/application inlets can be very complex. They may include other components such as an inlet throttle valve, a shrouded port, an annular duct (see Figure 1.1), a bifurcated duct, stationary guide vanes/airfoils used to straight or swirl flow (see Figure 1.1), movable guide vanes (used to vary pre ...

7. Condensate pump - Wikipedia

   en.wikipedia.org/wiki/Condensate_pump

   A plastic impeller in a molded volute at the bottom of the pump provides the pumping action; this impeller is connected to the motor via a metal shaft that extends downwards from the motor mounted above the tank's top. Large pumps are usually pad-mounted drawing liquid from a tank (sump) below the floor.