Fluid supply valve

A print fluid supply system, comprising:

• a valve to selectively couple a print fluid supply container to a print reservoir, the valve fixedly coupled to the print reservoir, the valve comprising:
• a static portion comprising a stem extending along a longitudinal axis, the stem including a head, a tail, and a shaft extending between the head and the tail;
• and
• a dynamic portion disposed around the stem, the dynamic portion longitudinally movable along the stem between a closed position and an opened position, the dynamic portion including a neck and a body extending longitudinally from the neck, the neck to seal around the head in the closed position, the body to slidably fluidly seal against a valve casing between opened and closed positions,
• wherein a liquid ink pathway and an air pathway are formed between the static portion and the dynamic portion.

A print system, comprising:

• a printhead;
• a print reservoir fluidly coupled to the printhead, the print reservoir maintained at a negative pressure;
• a valve to selectively couple a print fluid supply container to the print reservoir, the valve fixedly coupled to the print reservoir, the valve comprising:
• a static portion comprising a stem extending along a longitudinal axis, the stem including a head, a tail, and a shaft extending between the head and the tail;
• and
• a dynamic portion disposed around the stem, the dynamic portion longitudinally movable along the stem between a closed position and an opened position, the dynamic portion including a neck and a body extending longitudinally from the neck, the neck to seal around the head in the closed position, the body to slidably fluidly seal against a casing between opened and closed positions,
• wherein a print fluid pathway and an air pathway are formed between the static portion and the dynamic portion,
• wherein the valve is to seal the print fluid supply container to the print reservoir to maintain the negative pressure when selectively coupled.