21 results about "Leakage test" patented technology

Valve leakage is tested using either a hydrostatic test (i.e., the test medium is a liquid, such as water or kerosene) or a pneumatic test (the test medium is a gas, such as air or nitrogen). Zero leakage is rarely if ever possible, so the standards define the maximum allowable leakage (MAL) for valves under the specified testing conditions.