Coaxial flow injector

An injector for injecting a reagent, comprising:

• a housing;
• an axially translatable valve member positioned within the housing;
• an electromagnet positioned within the housing such that the valve member moves between a seated position and an unseated position relative to an orifice in response to energizing the electromagnet;
• a connector removably coupled to the housing, the connector including an inlet tube concentrically aligned with a return tube, the inlet tube being adapted to receive pressurized reagent from a source of reagent, the return tube being adapted to return reagent to the source;
• and
• a one-piece monolithic inner body positioned within and fixed to the housing, the inner body and housing at least partially defining a flow path for reagent to pass therebetween, the inner body including a bypass passage and a plurality of swirl slots, wherein reagent flows from the inlet tube, through the flow path and the bypass passage to the return tube when the valve member is in the seated position, a portion of the reagent flowing from the inlet tube, through the flow path, through the swirl slots and out of the orifice when the valve member is in the unseated position.

An injector for injecting a reagent, comprising:

• a housing;
• an axially translatable valve member positioned within the housing;
• an electromagnet coupled to the housing and including a coil of wire positioned proximate the valve member, wherein the valve member moves between a seated position and an unseated position relative to an orifice in response to energizing the electromagnet, wherein the housing includes a supply passageway in communication with the orifice and a return passageway;
• and
• a connector removably coupled to the housing and including an inlet tube surrounding a return tube, the inlet tube being removably coupled to the supply passageway and adapted to receive pressurized reagent from a source of reagent, the return tube being removably coupled to the return passageway and adapted to return reagent to the source, wherein the connector is a one-piece monolithic member including radially extending webs interconnecting the inlet tube and the return tube.

An injector for injecting a liquid, comprising:

• a tubular housing;
• an axially translatable valve member positioned within the housing;
• an electromagnet surrounding the housing, the electromagnet positioned such that the valve member moves between a seated position and an unseated position relative to an orifice in response to energizing the electromagnet;
• a one-piece monolithic inner body positioned within the housing, wherein a supply passageway axially extends between the inner body and the tubular housing, the inner body including a bypass passage and a plurality of swirl slots, wherein liquid flows through the supply passageway through the swirl slots and out of the orifice when the valve member is in the unseated position, the inner body including a central bore defining a return passageway in fluid communication with the bypass passage, the fluid flowing through the bypass passage and the return passageway when the valve member is in the seated position;
• and
• a connector removably coupled to the tubular housing, the connector including an inlet tube concentrically aligned with a return tube, the inlet tube may be adapted to receive pressurized liquid from a source and being in fluid communication with the supply passageway, the return tube being adapted to return liquid to the source and in fluid communication with the return passageway.