Pump head outlet port

A pump comprising:

• a plurality of actuators cooperating to pump solvent, at least one of the actuators comprising:
• a pump head having a chamber;
• a gland;
• a movable rod extending through the gland into the chamber of the pump head;
• and
• a plunger seal disposed in the gland around the rod for sealing against fluidic leakage from the chamber, the plunger seal having an annular flange that provides an OD (outer diameter) seal against the gland, the flange defining a seal cavity, the pump head further including an outlet port and an outlet channel, one end of the outlet channel being in communication with the outlet port and the other end of the outlet channel opening into the seal cavity of the plunger seal, the outlet channel providing a flow path for liquid in the chamber to travel towards the outlet port in response to movement of the rod.

A liquid chromatography system comprising:

• a pump with a plurality of actuators cooperating to pump solvent, at least one of the actuators comprising:
• a pump head having a chamber;
• a gland;
• a movable rod extending through the gland into the chamber of the pump head;
• and
• a plunger seal disposed in the gland around the rod for sealing against fluidic leakage from the chamber, the plunger seal having an annular flange that provides an OD (outer diameter) seal against the gland, the flange defining a seal cavity, the pump head further including an outlet port and an outlet channel, one end of the outlet channel being in communication with the outlet port and the other end of the outlet channel opening into the seal cavity of the plunger seal, the outlet channel providing a flow path for liquid in the chamber to travel towards the outlet port in response to movement of the rod.