Injector and method of assembly

An injector comprising:

• a container including a wall with an interior surface and a seal assembly with an interior surface, the interior surfaces of the wall and the seal assembly defining a closed sterile reservoir;
• a stopper disposed in the container and moveable to expel a drug product from the container during use of the injector;
• a fluid delivery system comprising a container needle having a point, the point disposed partially through the seal assembly in a storage state, and disposed through the seal assembly and into the sterile reservoir in a delivery state;
• an enclosed clean space, the point of the container needle being disposed in the enclosed clean space in the storage state;
• the seal assembly including a septum fixed relative to the wall of the container and a clean barrier, the clean barrier being spaced apart from the septum to define the enclosed clean space between the septum and the clean barrier, the septum having a first surface configured to be in contact with the drug product and a second surface bordering the enclosed clean space;
• the wall of the container defining a bore with an opening in fluid communication with a first end of the bore, and the clean barrier defining a second septum disposed across the opening and fixed relative to the wall of the container, the stopper being disposed within a second end of the bore and moveable along the bore;
• and
• an actuator that is adapted to move the container needle from the storage state to the delivery state.