An emergency shut-off valve, comprising: a valve body defining an inlet, an outlet, a valve port between the inlet and the outlet, and an aperture; a valve assembly positioned partially within the valve body and extending through the aperture; and an actuator assembly operatively coupled to the valve assembly to move the valve assembly between an open position and a closed position; wherein the valve assembly comprises: a poppet disposed within the valve body and moveable between an open position that allows the flow of fluid through the valve body and a closed position that prevents the flow of fluid through the valve body, the poppet comprising an arm having a slot formed therethrough; a rotatable shaft coupled to the poppet; and a gland including a generally cylindrical body and a bore formed through the body and sized to receive the shaft; characterized in that the shaft comprises a retaining member positioned within the slot of the poppet to prevent the poppet from being removed from the shaft; the gland comprises a first slot formed through a first end of the body from the bore to an outer surface of the gland, a second slot formed through the first end of the body from the bore to the outer surface, the second slot positioned opposite the first slot and the first and second slots configured to receive an end of a torsion spring, and a flange extending from an outer surface of the gland; and the emergency shut-off valve comprises an O-ring positioned within a recess surrounding the aperture of the valve body at an outer surface of the valve body, wherein the flange of the gland engages the O-ring to provide a seal between the gland and the valve body. a valve body defining an inlet, an outlet, a valve port between the inlet and the outlet, and an aperture; a valve assembly positioned partially within the valve body and extending through the aperture; and an actuator assembly operatively coupled to the valve assembly to move the valve assembly between an open position and a closed position; wherein the valve assembly comprises: a poppet disposed within the valve body and moveable between an open position that allows the flow of fluid through the valve body and a closed position that prevents the flow of fluid through the valve body, the poppet comprising an arm having a slot formed therethrough; a rotatable shaft coupled to the poppet; and a gland including a generally cylindrical body and a bore formed through the body and sized to receive the shaft; characterized in that the shaft comprises a retaining member positioned within the slot of the poppet to prevent the poppet from being removed from the shaft; the gland comprises a first slot formed through a first end of the body from the bore to an outer surface of the gland, a second slot formed through the first end of the body from the bore to the outer surface, the second slot positioned opposite the first slot and the first and second slots configured to receive an end of a torsion spring, and a flange extending from an outer surface of the gland; and the emergency shut-off valve comprises an O-ring positioned within a recess surrounding the aperture of the valve body at an outer surface of the valve body, wherein the flange of the gland engages the O-ring to provide a seal between the gland and the valve body. a poppet disposed within the valve body and moveable between an open position that allows the flow of fluid through the valve body and a closed position that prevents the flow of fluid through the valve body, the poppet comprising an arm having a slot formed therethrough; a rotatable shaft coupled to the poppet; and a gland including a generally cylindrical body and a bore formed through the body and sized to receive the shaft; characterized in that the shaft comprises a retaining member positioned within the slot of the poppet to prevent the poppet from being removed from the shaft; the gland comprises a first slot formed through a first end of the body from the bore to an outer surface of the gland, a second slot formed through the first end of the body from the bore to the outer surface, the second slot positioned opposite the first slot and the first and second slots configured to receive an end of a torsion spring, and a flange extending from an outer surface of the gland; and the emergency shut-off valve comprises an O-ring positioned within a recess surrounding the aperture of the valve body at an outer surface of the valve body, wherein the flange of the gland engages the O-ring to provide a seal between the gland and the valve body.