The pin type medical oxygen valve utilizes a face seal between the cylinder valve and the related burden cinch. There are two holes in explicit situations on the cylinder valve body underneath the power source port , in positions related with the gas mixture, which forestall association of the cylinder to a burden or pressing factor controller with a mis-coordinated with set of pins. The holes acknowledge pins 4 mm breadth by 6 mm long which are accurately lined up with the holes.
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