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The UltraLite Laptop Portable In-Line Pressure Relief Valve Testing Device
The Ultralite's primary function is to verify the set pressure of safety and safety relief valves in-line, without having to shut down a system or unit. External force applied to the valve spindle, coupled with system pressure and a "true" effective area, are acquired, processed, stored, and exported or printed. The end result is the valve set point. This is derived from the following equation: Ps = F/Ae + Pi
Where the "Ps" is the set pressure, "F" is the force required to overcome seating force, "Ae" is the effective area, and "Pi" is the inlet pressure at the time of test. The Ultralite has in its database effective areas for most PRV types and configurations. Force and inlet pressure are measured and brought into the microprocessor utilizing high-resolution data acquisition and precision transducers calibrated to 0.1%. Static inlet pressure must be present to perform the test.
A single acting hydraulic ram fixed into a universal mounting hardware assembly is placed over the valve spindle and connections are made for pressure and load input. Once the proper valve data is entered into the valve data base and the user performs the necessary automatic calibration, the test screen instructs the user to begin the test. The user strokes a small portable hand pump until the valve begins to relieve at which time the pump valve is opened and test data is triggered, processed and the results are displayed.
Test results are then saved and can be exported to a floppy disk or printed directly from the system. The results are provided in a two-page format with both digital and analog test information.
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