A unibody valve comprising a valve body including a first end and a second end spaced apart along a longitudinal axis, a central portion disposed between the first end and the second end, wherein the first end and the second end define a first flow passageway and a second flow passageway, respectively, and wherein the central portion defines an interior chamber, and a disc disposed within the interior chamber, wherein the interior chamber includes an enlarged side portion positioned outside of the at least one of the first flow passageway and the second flow passageway projected along the longitudinal axis, wherein the disc is disposed in the enlarged side portion when in an open position.