Variable control orifice valve

An apparatus for controlling flow, comprising:

• a flow body comprising a cavity, a diaphragm, a plunger, a sealing surface, a passage through a portion of the plunger, an intake opening, and an output opening, wherein:
• a flow path includes the intake opening, the passage through the plunger, and the output opening,
• the cavity includes a first cross-sectional shape including a bottom and a guiding surface, the guiding surface guiding the plunger sliding in the cavity;
• the plunger comprises a plunger tip located at an end portion of the plunger,
• the sealing surface is disposed along the sliding surface in the first cross-sectional shape,
• the plunger is configured to interact with the bottom in a first position, wherein the plunger is configured to be spaced from the bottom in a second position, and
• the passage through the plunger is closed when the plunger is in the first position and open when the plunger is in the second position.

An apparatus for controlling flow, comprising:

• a flow body, wherein the flow body defines:
• an intake opening and an output opening in the flow body,
• a cavity with a first cross-sectional shape, and
• an opening;
• a diaphragm, wherein the diaphragm seals the opening of the cavity and the diaphragm includes a hole;
• a plunger with a second cross-sectional shape corresponding to the first cross-sectional shape of the cavity, wherein the plunger is longitudinally movable within the cavity, and wherein the plunger defines an opening at an end of the plunger, wherein the opening is defined by an opening profile;
• a rod coupled with the plunger for facilitating the longitudinal movement of the plunger, wherein the rod comprises a rod cross section that corresponds to the hole in the diaphragm,
• a flow path defined by the intake opening, the opening at an end of the plunger, and the output opening, wherein:
• the first cross-sectional shape includes a bottom and a guiding surface, the guiding surface guiding the plunger sliding in the cavity;
• the plunger is longitudinally moveable within the flow body, thereby changing a relative position of the opening at the end of the plunger with respect to the intake opening and output opening and thereby allowing for a control of fluid through the flow path.