As mentioned above, the large-diameter needle allows for low-pressure operation, 1-2 psi. This is important because standard wine bottles are NOT designed to contain signficant pressure.
The gas-delivery mechanism is made of aircraft-grade aluminum and 304 stainless for safe, trouble-free operation.
As the Pungo trigger is deflected, the wine port opens before the gas port, ensuring that gas is never introduced into a sealed bottle.
The wine port in the needle is situated below the gas port, which means that if the wine port hasn't made its way through the cork, (which can happen if the cork is pushed into the bottle to a certain extent) the gas port will also be embedded in cork, unable to introduce gas into the sealed bottle.
The Pungo includes a precision-machined pressure-relief valve (PRV) that will vent excess pressure in the gas circuit. The PRV will reset itself automatically. This safety can be checked by placing your thumb over the gas port and pulling the trigger, in which case you should hear gas escaping from inside the housing. Perform this safety check from time to time.
If all else fails, the Pungo does not lock onto the bottle, leaving the cork free to pop out.
