A valve assembly, comprising: a valve body defining a first enclosure having a first port and a second port, and a second enclosure having a third port; a movable valve member positioned in the first enclosure between the first port and the second port and configured to control fluid flow from the first port to the second port; an internal seal disposed in the valve body _between the first enclosure and the second enclosure that prevents fluid flowing through the first port or the second port from reaching the third port; an internal mechanism with a first end and a second end, the first end disposed in the first enclosure and operatively coupled to the movable valve member, the second end traversing the internal seal and positioned in the second enclosure; a removable plug operable to seal the third port off from an outside environment of the valve assembly when the removable plug is seated in the third port; an internal actuation member having a ferromagnetic portion comprising an impermanent or permanent magnet, the internal actuation member operatively coupled to at least a portion of the internal mechanism; and an external actuator operatively coupled to an exterior of the valve body, the external actuator comprising: a first magnetic pole section adjacent to the valve body; and a second magnetic pole section adjacent to the valve body; and wherein movement of the external actuator is effective to exert a first force on the internal mechanism, and wherein the internal mechanism is effective to transmit a second force to the movable valve member; characterized in that the internal actuation member is disposed in the first enclosure. a valve body defining a first enclosure having a first port and a second port, and a second enclosure having a third port; a movable valve member positioned in the first enclosure between the first port and the second port and configured to control fluid flow from the first port to the second port; an internal seal disposed in the valve body _between the first enclosure and the second enclosure that prevents fluid flowing through the first port or the second port from reaching the third port; an internal mechanism with a first end and a second end, the first end disposed in the first enclosure and operatively coupled to the movable valve member, the second end traversing the internal seal and positioned in the second enclosure; a removable plug operable to seal the third port off from an outside environment of the valve assembly when the removable plug is seated in the third port; an internal actuation member having a ferromagnetic portion comprising an impermanent or permanent magnet, the internal actuation member operatively coupled to at least a portion of the internal mechanism; and an external actuator operatively coupled to an exterior of the valve body, the external actuator comprising: a first magnetic pole section adjacent to the valve body; and a second magnetic pole section adjacent to the valve body; and a first magnetic pole section adjacent to the valve body; and a second magnetic pole section adjacent to the valve body; and wherein movement of the external actuator is effective to exert a first force on the internal mechanism, and wherein the internal mechanism is effective to transmit a second force to the movable valve member; characterized in that the internal actuation member is disposed in the first enclosure.