III) Instrumentation : To control & monitor operation
Low pressure Switch
This is to avoid dry running pump. The changeover of LPS takes
place depending on the line pressure at the suction of pump and
pressure set point. In case of low pressure in pump suction, it
trips off the plant.
High pressure Switch
This is to avoid pressure build up in the permeate line. The
changeovers of HPS takes place depending on the line pressure at
the discharge of permeate line and pressure set point (2 bar).
In case of high pressure in the permeate line, it trips off the