The seismic capacity for the equipment class of Fluid-Operated Valves (FOV) and Air-Operated Valves (AOV) maybe based on earthquake experience data. This equipment class includes a wide diversity of valve sizes, types, and applications, which are actuated by air, water, or oil. Liquid-operated (i.e., hydraulic) piston valves are not included in the FOV class of equipment because they have not been reviewed in sufficient detail to be included.
Office of Environment, Health, Safety & Security
October 22, 2026
Estimated Read Time min
The seismic capacity for the equipment class of Fluid-Operated Valves (FOV) and Air-Operated Valves (AOV) maybe based on earthquake experience data. This equipment class includes a wide diversity of valve sizes, types, and applications, which are actuated by air, water, or oil. Liquid-operated (i.e., hydraulic) piston valves are not included in the FOV class of equipment because they have not been reviewed in sufficient detail to be included.