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Investigation into the wear of a Ball Valve

Investigation into the wear of a Ball Valve. Problem Definition. The wear rate of a ball valve defines the number of cycles the valve is rated for.

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Investigation into the wear of a Ball Valve

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  1. Investigation into the wear of a Ball Valve

  2. Problem Definition • The wear rate of a ball valve defines the number of cycles the valve is rated for. • This assumes a small ball valve, quarter turn (90 degree), 2-way, 2-position. Assume intermittent operation. A small (<= 1-inch valve) will be modeled. Problem is a circumferential load on a sphere

  3. Emphasis of research • Research includes wear rates of relevant (plastic) seat material properties and wear characteristics. Various papers on wear tests available to potentially use for test data. • For computation efficiency an axi-symmetric model will be created in FEA software. • Abaqus appears to use Archard wear model • Compare to analytical method • May need to use adaptive meshing • Ball will be a rigid body • Nominal sizes will be used • Potential thermal effects included

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