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/ Solutions for thermostatic mixing valves


                 Normal or low frequency    The choice of PREMIX thermostatic mixing valve depends upon the installation type, the frequency of simultaneous
                 of simultaneous use:  use (coefficient), the number of points-of-use, and the dynamic water pressure at the PREMIX inlets.
                  The following formula    To select the appropriate PREMIX for an installation, it is necessary to calculate the design corrected flow rate.
                  is recommended as
                  a means of determining
                  the simultaneity coefficient:
                        0,8           1. DETERMINING THE COEFFICIENT OF SIMULTANEOUS USE
                        √x-1
                 (x represents the number
                 of points-of-use)    It depends on type of site (public and commercial places) and number of points-of-use to supply.

                                                                                            Simultaneity coefficient
                 High-frequency
                 of simultaneous use                                                 High simultaneity    Normal/low simultaneity
                 (public places):
                                           Number of taps and valves to be connected   frequency           frequency
                  DELABIE recommends                                               Sport stadia, schools,   Hospitals, hotels, offices,
                  using the following formula
                  to determine the simultaneity                                    boarding schools, camp   apartment blocks, social
                  coefficient:                                                          sites, etc.        housing, etc.
                         2                                1 - 5                           1                   1
                        √x-1                             5 - 10                           1                  0.5
                 (x represents the number                10 - 15                         0.6                 0.3
                 of points-of-use)
                                                         15 - 25                         0.5                 0.3
                                                         25 - 40                         0.4                 0.2
                 Exceptionally high-frequency:
                                                         40 - 60                         0.3                 0.15
                  Use of coefficient 1
                  for up to 15 points-of-use.          More than 60                      0.2                 0.1



                                      2. CALCULATING GROSS FLOW RATE

                                      The expected flow rate depends on operating flow rate for each type of outlet
                                      (refer to manufacturer's data sheets for tap and valve flow rates).
                                                                  Flow rate       Number of fittings   Total gross flow rate
                                      DELABIE time flow basins      3 lpm                x ...               = ...
                                      DELABIE time flow showers     6 lpm                x ...               = ...
                                      Basin, sink, shower, bidet  12 lpm                x ...               = ...
                                      Bath tub                    20 lpm                x ...               = ...
                                      TOTAL GROSS FLOW RATE for all points-of-use



                                      3. CALCULATING THE DESIGN FLOW RATE


                                      To supply installation branch.

                                              Total gross             Simultaneity          Design corrected flow rate
                                               flow rate     x          coefficient    =            for mixed water






















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