Flow-through pressure regulator including a closure member assembly integrated with a housing

A flow-through pressure regulator, comprising:

• a divider separating first and second chambers, the divider including a passage providing fluid communication between the first and second chambers;
• a closure member moving relative to the divider between first and second configurations, the first configuration substantially preventing fluid communication through the passage, and the second configuration permitting fluid communication through the passage;
• a housing including:
• a first homogeneous housing portion including an inlet and defining the first chamber, the first homogeneous housing portion forming a pocket receiving a majority of the closure member;
• and
• a second housing portion including an outlet and defining the second chamber;
• a resilient element biasing the closure member from the first homogenous housing portion and toward the divider;
• and
• a retainer maintaining the majority of the closure member within the pocket, wherein the pocket comprises a first cylindrical portion engaging the retainer, a second cylindrical portion supporting the resilient element, and a conical portion connecting the first and second cylindrical portions, the conical portion receiving the majority of the closure member.