Fluid material injection device

A fluid injection device for injecting a dispensable fluid material into a pressurized system having relatively high and low pressure zones of a pressurized fluid, the fluid injection device comprising:

• a moisture-impermeable tube having an inlet end and an outlet end, the inlet end having an inlet closure member which is connectible in fluid flow communication to such high pressure zone, and the outlet end having a connector assembly comprising an outlet tube connector which is connectible in fluid flow communication with such low pressure zone via a service port of such pressurized system, the outlet tube connector defining a discharge flow path extending therethrough to exteriorly of the device;
• the tube defining therewithin a closed storage chamber disposed between the inlet closure member and the outlet tube connector, the storage chamber containing a dispensable fluid material and having an outlet end closed by an outlet valve, the outlet valve comprising an operating pin facing a movable member disposed within the connector assembly and aligned with the operating pin;
• the movable member being disposed within the discharge flow path in a spaced position adjacent to and spaced from the outlet valve and being movable along a portion of the flow path within the connector assembly, the movable member being configured so that upon connection of the connector assembly to such service port, the movable member is forced from the spaced position into engagement with the operating pin to displace the operating pin to open the outlet valve for discharge of the dispensable fluid material through the discharge flow path;
• and
• the movable member comprising a check valve passage within which is disposed a check valve configured to prevent backflow from such service port into the outlet valve.