Thermostatic mixing valves: Hysteresis (NT VVS 061)

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  • Report #: NT VVS 061
  • Approved: November 1987
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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.