Tailoring solutions to your specific needs and specifications, we design and manufacture complete systems comprising spray valves with integrated spray nozzles, spray bars and control cabinets, including commonly used bus interfacings.

In the field of hot- and cold-rolling mills, the multi-zone cooling system shown above in simplified form is employed in the production of steel, aluminium and non-ferrous metal sheets and plates. For this purpose 2/2 directional spray valves in pitches of 13, 26 or 52 mm are arranged over the entire width of the roll to apply cooling media in a well-aimed manner to certain roll zones so that the sheet thickness can be controlled to the closest possible tolerance. 

This process necessitates reliable, quick-acting spray valves of the kind developed, manufactured and sold by Evertz Hydrotechnik to satisfy the customer's specific needs.

As can be seen from the above schematic diagram, the cooling medium is collected below the roll stand, cleaned in a filtering plant and fed via a pumping station to a spray bar fitted with spray vavles. The spray valves are controlled by 3/2 directional solenoid valves, which are usually located outside the roll stand. However, if the customer desires they can be mounted directly at the spray bar within the roll stand. Control Cabintets 

The valves can be piloted by means of system-integrated or external media. In the example shown here, an external medium (e.g. compressed air) is used for piloting. This is a design variant that is particularly recommended if a contamination of the main fluid is expected. Nevertheless, if carefully filtered the available cooling agent or, for example, fully demineralized water, can also be used for piloting.