A pinch valve comprising: a valve body comprising: an upper body portion having a first channel; a lower body portion having a second channel, the upper body portion movably coupled to the lower body portion with a hinge, a locking mechanism to couple the lower body portion and the upper body portion, wherein the first channel and the second channel define a passageway extending along an axis from a first side of the valve body to a second side of the valve body to receive a flexible tubing when the first body portion is coupled to the second body portion, and wherein the passageway is to retain the flexible tubing to prevent the flexible tubing from moving relative to the first and second body portions in an axial direction; wherein the upper body portion includes a longitudinal aperture substantially perpendicular to the passageway to slidably receive a valve stem; a flow control member disposed within the passageway and slidably received by the longitudinal aperture, characterized in that the flow control member comprises a spherically shaped valve plug that is arranged to be moved by the valve stem to pinch the flexible tubing, in that the upper body portion has a first stepped profile defining a first protruding portion with a first aperture extending through the first protruding portion, the lower body portion has a second stepped profile defining a second protruding portion with a second aperture extending through the second protruding portion, wherein the first stepped profile matably engages the second stepped profile with the first aperture aligned with the second aperture, and in that the locking mechanism comprises a spring-loaded pin received through the first and second apertures to lock the first body portion and the second body portion together in a closed position. a valve body comprising: an upper body portion having a first channel; a lower body portion having a second channel, the upper body portion movably coupled to the lower body portion with a hinge, a locking mechanism to couple the lower body portion and the upper body portion, wherein the first channel and the second channel define a passageway extending along an axis from a first side of the valve body to a second side of the valve body to receive a flexible tubing when the first body portion is coupled to the second body portion, and wherein the passageway is to retain the flexible tubing to prevent the flexible tubing from moving relative to the first and second body portions in an axial direction; wherein the upper body portion includes a longitudinal aperture substantially perpendicular to the passageway to slidably receive a valve stem; a flow control member disposed within the passageway and slidably received by the longitudinal aperture, characterized in that the flow control member comprises a spherically shaped valve plug that is arranged to be moved by the valve stem to pinch the flexible tubing, in that the upper body portion has a first stepped profile defining a first protruding portion with a first aperture extending through the first protruding portion, the lower body portion has a second stepped profile defining a second protruding portion with a second aperture extending through the second protruding portion, wherein the first stepped profile matably engages the second stepped profile with the first aperture aligned with the second aperture, and in that the locking mechanism comprises a spring-loaded pin received through the first and second apertures to lock the first body portion and the second body portion together in a closed position. an upper body portion having a first channel; a lower body portion having a second channel, the upper body portion movably coupled to the lower body portion with a hinge, a locking mechanism to couple the lower body portion and the upper body portion, wherein the first channel and the second channel define a passageway extending along an axis from a first side of the valve body to a second side of the valve body to receive a flexible tubing when the first body portion is coupled to the second body portion, and wherein the passageway is to retain the flexible tubing to prevent the flexible tubing from moving relative to the first and second body portions in an axial direction; wherein the upper body portion includes a longitudinal aperture substantially perpendicular to the passageway to slidably receive a valve stem; a flow control member disposed within the passageway and slidably received by the longitudinal aperture, characterized in that the flow control member comprises a spherically shaped valve plug that is arranged to be moved by the valve stem to pinch the flexible tubing, in that the upper body portion has a first stepped profile defining a first protruding portion with a first aperture extending through the first protruding portion, the lower body portion has a second stepped profile defining a second protruding portion with a second aperture extending through the second protruding portion, wherein the first stepped profile matably engages the second stepped profile with the first aperture aligned with the second aperture, and in that the locking mechanism comprises a spring-loaded pin received through the first and second apertures to lock the first body portion and the second body portion together in a closed position.