ZDE3K valves are direct operated pressure reducing proportional valves with ISO 4401-03 (CETOP RP121H) mounting surface. They are in compliance with ATEX 94/9/EC standards and are suitable for the use in potentially explosive atmospheres, that fall within the ATEX II 2GD either for gas or for dust classification and I M2, for mines.
The valves are used to reduce pressure in the secondary circuit branches thus ensuring stability of controlled pressure in the event of variations of the flow rate through the valve.
With the valves the statement of conformity to the upmentioned standards is always supplied.
The ZDE3K valves are supplied with a finishing surface treatment (zinc-nickel) suitable to ensure a salt spray resistance up to 600 h (test operated according to UNI EN ISO 9227 standards and test evaluation operated according to UNI EN ISO 10289 standards).
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