Installation, operation and maintenance manual - FMA 2000
Ref: 2000/CPF01/230/VH
35
15. – HYDRAULIC CIRCUIT.
The filter has a hydraulic valve for draining the backwashing flow. The valve remains closed
because of the internal spring, and it opens when introducing water in the lower chamber and it
closes when the drain is in process.
The valve has a mechanic regulation that allows to adjust the backwashing flow in isntallations
with a pressure superior to 6 bar.
The opening and closing process is automated by means of a 24V DC NC solenoid (normally
closed). It is specified in the drawing below.
The 3-way valve has to remain in AUTO position, allowing the possibility to operate manually with
the OPEN and CLOSE positions.
Содержание FMA-2000 series
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