-No external power, energy receives the water flowing through the pipe.
-Simplicity In the design, construction and operation.
-Stable and accurate control of the flow.
Flow rate is determined by the pressure loss that occurs in a hole plate located upstream of the valve, which is dimensioned to this end. By increasing the flow rate, pressure drop increases.
The pressure difference between both sides of the plate is detected by the pilot acting opening or closing the valve as appropriate.
The pilot has a screw on its top through which it is possible to adjust the allowed pressure in the orifice plate, and therefore the water flow through the valve. Tightening the screw clockwise increases the maximum flow rate is reduced and turning counterclockwise.
When the flow rate increases as a result of fluctuating demand, the increase in pressure drop produced in the orifice plate causes the change of position of the pilot. When this happens, the flow again decreases to the set value and the pilot stops sending pressure to the chamber, finishing the valve in the new regulation position.
The flow limiting valve is used when you want to control the flow of water supplied by the valve.