A tube clamping system includes a Bowden cable with an inner member and an outer casing. A first jaw element has a first tube abutment surface, a passage, and a first sliding latch portion. The inner member passes through the passage. A second jaw element has a second tube abutment surface, a cable guide, and a second sliding latch portion. The inner member has a first end held in the mated sliding latch portions so that sliding of the inner member results in selectably positioning the first and second tube abutment surfaces together or spaced apart. An actuator coupled to a second end of the outer casing and a second end of the inner member applies a force to slide the inner member within the outer casing, the passage, and the cable guide. The Bowden cable substantially isolates the tube being clamped from the weight of the actuator.