Pressure Maintaining Valve used in labs
It is especially for control and adjust output pressure at random.
Could be H2, N2, air, N2/Air, H2/air and N2/H2/air output pressure.
With display pressure gauge to see directly.
Connection size could be M8*1 or 1/8"
With this pressure maintaning valve, you could use gases
At any point you want!
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