A fluid control device, comprising: a valve body defining a flow path for a fluid; a seat ring disposed within the flow path and having a seating surface, the seating surface of the seat ring having a primary portion with a primary angle of about 20 degrees to about 45 degrees from a longitudinal axis of the seat ring; and an actuator coupled to the valve body including a control assembly adapted for displacement relative to the seat ring for regulating a flow of the fluid through the flow path, the control assembly including a mounting portion and a valve plug assembly coupled to the mounting portion and adapted to sealingly engage the seat ring, the valve plug assembly comprising: a valve plug having a cylindrical body, an annular flange radially extending from the body, and a sealing disk disposed within the annular flange, the sealing disk having a sealing surface adapted to engage the seating surface of the seat ring, and a retainer coupled to the valve plug to secure the valve plug to the mounting portion, the retainer having a body with a first portion, a second portion, and an annular side extending from the first portion to the second portion at any one of about 30 degrees to about 45 degrees, characterized in that the seating surface of the seat ring further comprises a secondary portion extending outwardly from the primary portion at a secondary angle at any one or between five degrees and 20 degrees from a lateral axis of the seat ring, the lateral axis being perpendicular to the longitudinal axis of the seat ring. a valve body defining a flow path for a fluid; a seat ring disposed within the flow path and having a seating surface, the seating surface of the seat ring having a primary portion with a primary angle of about 20 degrees to about 45 degrees from a longitudinal axis of the seat ring; and an actuator coupled to the valve body including a control assembly adapted for displacement relative to the seat ring for regulating a flow of the fluid through the flow path, the control assembly including a mounting portion and a valve plug assembly coupled to the mounting portion and adapted to sealingly engage the seat ring, the valve plug assembly comprising: a valve plug having a cylindrical body, an annular flange radially extending from the body, and a sealing disk disposed within the annular flange, the sealing disk having a sealing surface adapted to engage the seating surface of the seat ring, and a retainer coupled to the valve plug to secure the valve plug to the mounting portion, the retainer having a body with a first portion, a second portion, and an annular side extending from the first portion to the second portion at any one of about 30 degrees to about 45 degrees, a valve plug having a cylindrical body, an annular flange radially extending from the body, and a sealing disk disposed within the annular flange, the sealing disk having a sealing surface adapted to engage the seating surface of the seat ring, and a retainer coupled to the valve plug to secure the valve plug to the mounting portion, the retainer having a body with a first portion, a second portion, and an annular side extending from the first portion to the second portion at any one of about 30 degrees to about 45 degrees, characterized in that the seating surface of the seat ring further comprises a secondary portion extending outwardly from the primary portion at a secondary angle at any one or between five degrees and 20 degrees from a lateral axis of the seat ring, the lateral axis being perpendicular to the longitudinal axis of the seat ring.