9
Recommended Maximum Dynamic Supply Pressure: 5 bar.
Maximum Static Supply Pressure
:
10 bar
.
Recommended maximum flow velocity in pipelines is 2 metre/second.
*
Pressure Loss Ratio is determined by subtracting the resistance to flow at the outlet
(generally known as “back pressure”, and measured at the outlet of the mixing tap)
from the dynamic pressures of the hot and cold water at each inlet of the mixing tap.
This is at its extreme when the mixing tap is being used at its lowest flow rate and
when the maximum inequality occurs in the pressure of the hot and cold water supplies.
Hydraulic restriction: Flow Rate/Pressure Loss Graph - all models
(Shower control only, equal dynamic supply pressures, unrestricted outlet and
mid-blend temperature setting)
Pressure Loss - bar
Flow Rate
Litres/
Minute
0
10
20
30
40
50
0
1
2
3
Operating Parameters: Temperatures
Optimum performance is obtained when
temperature differentials
of
20
°
C
or more
exist between blend and either supply. Blend control accuracy will begin to diminish at
temperature differentials below
12
°
C
.
Blend Temperature Range: between ambient cold and approximately 60
°
C,
according to hot water supply temperature.
Thermostatic Control Range:
approximately
25-60°C.
Optimum Thermostatic Control Range: 30-50°C.
Recommended Minimum Cold Water Supply Temperature: 1°C.
Recommended Maximum Hot Water Supply Temperature:
85
°
C.