초록 ▼

A method of, and apparatus for, determining leakage in a valve or the like which is not dependent on bulk modulus of the fluid is described. The test apparatus includes a pressure transducer which measures the change in pressure along a length of pipe (XY) from the valve under test to a second valve

A method of, and apparatus for, determining leakage in a valve or the like which is not dependent on bulk modulus of the fluid is described. The test apparatus includes a pressure transducer which measures the change in pressure along a length of pipe (XY) from the valve under test to a second valve for a period of time. The effect of bulk modulus of the test fluid is eliminated by placing a volume of gas between the pressure transducer and the section XY of pipe. Leakage is determined by measuring the change in pressure at the transducer over a period of time after the valve under test is closed.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method of detecting a leak in a device under test, comprising:placing the device under test in a fluid flow path;providing a pressure transducer downstream in the fluid flow path from the device under test;providing a volume of gas in pressure communication with the p

[ What is claimed is:] [1.]1. A method of detecting a leak in a device under test, comprising:placing the device under test in a fluid flow path;providing a pressure transducer downstream in the fluid flow path from the device under test;providing a volume of gas in pressure communication with the pressure transducer; detecting a first pressure at the pressure transducer when the device under test is closed to prevent fluid flow;detecting a second pressure at the pressure transducer a predetermined period of time thereafter; andwherein the difference between the first and the second detected pressures is a measure of the leakage of the device under test; andfurther comprising providing a second volume of gas downstream from the pressure transducer.