Patent ID: 6968851

Claim:
A system for proving sealing engagement of first and second safety shut-off valves, the first and second safety shut-off valves establishing a controlled volume therebetween, the system comprising: a device for determining or measuring volumetric flow rate; a pump in fluid communication with the device for determining or measuring volumetric flow rate; a first selectable valve having an inlet and first and second outlets, the inlet connectable to the controlled volume, the first outlet connected to the pump; a second selectable valve having first and second inlets and an outlet, the first inlet connected to the pump, the second inlet connected to the second outlet of the first selectable valve, the outlet in communication with an outlet of the second safety shut-off valve; wherein the first selectable valve is selectively operable to communicate the controlled volume with the device for determining or measuring volumetric flow rate and the pump or with the second selectable valve, and wherein the second selectable valve is selectively operable to communicate the outlet of the second safety shut-off valve with the first selectable valve or with the device for determining or measuring volumetric flow rate and the pump.