Performance test standards and documentation In the test standards to ISO 9906-2012 and HI 11.6-2012 it is mandatory to specify the guarantee point with a guaranteed flow and a guaranteed head, that shall be evaluated against one appropriate grade and its corresponding tolerance, tQ and tH. See tolerance table below. Requirements for Power, tP or Efficiency, tη, is an option. As standard will therefore Xylem not guarantee the complete power or efficiency curve over the range, if the customer didn’t require one of these in the order. Xylem shall guarantee that the product will not take more power than the value of the rated power plus a +8 percent allowed tolerance.
Performance test standards and documentation <br>In the test standards to ISO 9906-2012 and HI 11.6-2012 it is mandatory to specify the <br>guarantee point with a guaranteed flow and a guaranteed head, that shall be evaluated <br>against one appropriate grade and its corresponding tolerance, tQ and tH. See tolerance table <br>below. <br>Requirements for Power, tP or Efficiency, tη, is an option. As standard will therefore Xylem not <br>guarantee the complete power or efficiency curve over the range, if the customer didn’t <br>require one of these in the order. Xylem shall guarantee that the product will not take more <br>power than the value of the rated power plus a +8 percent allowed tolerance.
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