Thermostatic mixing valves: Hysteresis (NT VVS 061)

  • Report #: NT VVS 061
  • Approved: November 1987
Download pdf Size: 158.86 KB


  The test proposal below specifies a method which permits the measurement of the differences in outflowing water temperatures with the same instant flow, when a thermostatic mixing valve is operating, and the differences are caused by increasing, respectively decreasing water temperatures, and when the pre-set value of the controller is constant.