BASIC OPERATION AND FUNCTION OF CONTROL VALVES
face to face dimension: The dimension from the face of the inlet opening to the face of the outlet opening of a valve or fitting. facing, flange: The finish on the end connection that mates with gasket surfaces. failure mode: The position to which the valve closure member moves when the actuating energy source fails.
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BASIC OPERATION AND FUNCTION OF CONTROL …
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REGULATOR – PRINCIPLE OF OPERATION
www.controlglobal.com17. HARD FACING – A material harder than the surface to which it is applied; usually applied to valve seats to resist galling or fluid erosion. 18. SINGLE SEATED – A valve having a plug with a single seat. 19. DOUBLE SEATED – A valve featuring a plug with two seats. 20. BALANCED – A valve featuring a pressure balanced plug with two ...
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