Molar transfer device

A molar transfer device comprising:

• a ballast mechanism comprising:
• a first ballast cylinder,
• a passive piston provided in the first ballast cylinder that divides the first ballast cylinder into a first ballast chamber and a second ballast chamber,
• a first ballast port for allowing gas to flow into and out of the first ballast chamber, and
• a second ballast port for allowing gas to flow into and out of the second ballast chamber;
• and
• a valve device comprising:
• a valve body including an upstream gas port, a midstream gas port, and a downstream gas port, and
• a valve contained in the valve body coupled to the first ballast port and the second ballast port for sequentially:
• (a) directing gas from the upstream gas port into the first ballast chamber while emptying the second ballast chamber into the downstream gas port, (b) coupling the first ballast port to the midstream gas port to equilibrate the gas in the first ballast chamber, (c) directing gas from the upstream gas port into the second ballast chamber while emptying the first ballast chamber into the downstream gas port, and (d) coupling the second ballast port to the midstream gas port to equilibrate the gas in the second ballast chamber.