Mechanisms and Methods for Pressurized Fluid Injection and Sealing

Mechanisms and methods for pressurized fluid injection and sealing into containment vessels using a divided valve mechanism are disclosed. The invention describes designs and methods in which a valve may be plugged by an actuator then the valve and actuator are then disjoined, allowing the containment vessel to then be sealed but without the additional mass or volume of the actuation mechanism and without fluid loss from the containment vessel.