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The seismic capacity for the equipment class of Chillers (CHL) maybe based on earthquake experience data. This equipment class includes skid-mounted units comprised of components such as a compressor, a condenser, an evaporator, and a control and instrumentation panel. Chillers condense refrigerant or chill water for indoor climate-control systems which supply conditioned air for equipment operating environments and for personnel comfort.

The seismic capacity for the equipment class of Vertical Pumps (VP) maybe based on earthquake experience data. This equipment class includes pumps with the impeller drive shaft mounted in a vertical (as opposed to horizontal) direction. Vertical pumps are typically powered by an electric drive motor, vertically aligned, and mounted atop a steel or cast-iron support frame that is anchored to a concrete base pad.

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The seismic capacity for the equipment class of Horizontal Pumps (HP) maybe based on earthquake experience data. This equipment class includes all pumps commonly found in applications which have their axes aligned horizontally. The class includes pumps driven by electric motors, reciprocating piston engines, and steam turbines. The common peripheral components such as conduit, instrumentation, and suction and discharge lines up to their first support on the building or nearby structure are included in this equipment class.

The seismic capacity for the equipment class of Solenoid-Operated Valves (SOV) maybe based on earthquake experience data. This equipment class includes a wide diversity of sizes, types, and applications. Solenoid operators are smaller and lighter than motor operators. Solenoid-operated valves are actuated bypassing an electrical current through a coil, thereby creating a magnetic field which opens or closes the valve.