The VNA series is a universal 2 port valve used for controlling pneumatic systems or air-hydro circuits. Its balanced poppet design permits normal and reverse flow application.
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Operation description of the soft start-up valve q When the pilot valve q is turned OFF , the pilot air of the spool w is exhausted from the pilot valve q, and the spool w and valve e are returned upward due to the spring. This opens the flow passage to port 3 (R), exhausting the air pressure on the port 2 (A) side.