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Auxiliary hand levers applicable with direct operated on-off solenoid valves type - DHI, DHA, DHE; and proportional valves type - DHZO, DHZE, DHZA, QVHZO.
The lever allows the valves to operate in the absence of electrical power supply, for example, in case of an emergency or during maintenance. When the valve is electrically operated, the lever remains stopped, in its rest position. The application of an auxiliary lever does not affect the performance of the original valves.
Techf info: E138