variabel-speel pumps

  • Hayward Adds Two Pumps to Expert Line

    ByPoolPro

    Scott Petty, the global product manager for pumps and above-ground equipment at Hayward Pool Products, has many analogies for the benefits of variable-speed pumps. “It’s like going from standard definition to HDTV,” Petty says. “Once you’ve seen the benefits, it’s hard to imagine going back.” Or, “Single speed is like having a car that only…

  • It’s a Cubic Function

    ByMac King

    Let’s talk physics, shall we? • The affinity laws tell us a whole bunch about motors, pumps and fans. If you didn’t adore science class, you likely found them in textbooks flanked by daunting terminology like “nominal speed,” “shaft power” and “volumetric flow rate.” But even with poor marks in high school physics, if you…