Conduit Gate Valves with Back Seat come with clapper or disc or gate that moves in a plane perpendicular to the direction of flow. These Conduit Gate Valves are provided with a back seat or secondary stem sealing feature in addition to primary stem seal. These Conduit Gate Valves have a circular bore in the gate that allows a sphere to pass with a nominal size not less than ½" nominal diameter. These Conduit Gate Valves with Back Seat come in the size of 2" to 36" size.