STF-Filtros FMA-3000, Installation, Operation And Maintenance Manual

Page: 33 / 41

Installation, Operation and Maintenance Manual – FMA 3000
Ref: 3000/T/6/VH 33
14. – HYDRAULIC CIRCUIT
The filter has a hydraulic valve which is resposnible for evacuating the cleaning flow. The valve
remains closed by action of an internal spring and the water pressure in the valve chamber, it
opens when the water in the chamber is drained, and closes when it is filled.
While the drainage or filling of the hydraulic valve chamber is taking place, the same operation is
performed in the hydraulic cylinder which manages the longitudinal movement of the cleaning
scanner.
The valve can be mechanically adjusted, thus allowing to adjust the cleaning flow in facilities with
pressures greater than 6 bar.
The opening and closing processes are automated by using a 12V DC latching solenoid as
specified in the attached diagram.