NORBAR has provided Swap N Go with a more efficient way of removing old valves from gas cylinders for inspection and then re-tension new valves between 110Nm and 240Nm. The range is large owing to the fact that the valves must be orientated to suit the position of the steel shroud that protects it.
Norbar provided a PT500 single-speed, suspended by a spring balance and controlled by a custom built control box with three settings. The first setting is 110Nm, providing the minimum torque required. The operator then selects the 240Nm setting to orientate the valve to the correct position. If the valve does not line up within these two settings the cylinder is removed from the line for further inspection. A 500Nm setting allows removal of the valves.
When the tool is raised by the operator the spring balance retracts and lifts the tool away from the job at hand. In the future Swap N Go will require a final torque reading to be obtained and recorded. This system allows them to upgrade by fitting an annular transducer.
The control box is fitted with a Parker filter regulator unit feeding into three panel mount L port valves, two of which are regulated, using SMC regulators to achieve the two lower torques. All outlets go to a common outlet port, which feeds the tool.
All gauges have been removed from the unit and quick release fittings have been added so the operator cannot adjust the settings. Settings are checked using a master gauge.