Sequence valves VSD are used to supply a second cylinder, after the first one has finished its cycle
These valves are used to make two cylinders operate in sequence, the second one starts when the setting is exceeded, the check valve ensures free flow in the opposite direction. With these valves the two cylinder pressures are added together, therefore the pressure of the second cylinder pressure should be limited.
The external body is made of high-strength steel and is protected from oxidation by a zinc treatment. It is possible to request a zinc/nickel surface treatment to increase the oxidation resistance, in case the valve is poorly protected and exposed to atmospheric agents.
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