Transcription of Edward Valves - Flowserve
{{id}} {{{paragraph}}}
Example: confidence
Edward Valves - Flowserve
Edward ValvesThe Rockwell Type A Stored Energy Actuator Development and QualificationV-Rep 80-321 Numbers in brackets designate references listed at end of Rockwell Type A Stored Energy Actuator Development and QualificationAbstractUntil about a dozen years ago, the operat-ing time for large (typically size 16-32),power-operated Valves in power plantswas usually measured in minutes. Thisposed few problems until safety con-siderations in nuclear plants changed therequired time frame from minutes toseconds. Basic ground rules also changedin that valve operation under emergencyconditions often had to be assured even ifall normal power supplies suddenly combination of requirements de-manded stored energy actuators that couldassure at least one half-cycle of operation(opening or closing a valve) withoutdependence on external power. In justover a decade, Valves and actuators forcritical services have traversed severalgenerations of development. With eachgeneration, requirements for performanceand reliability have escalated; even more,demands for proof testing or qualificationincreased at a rate faster than performancerequirements in users article will describe the developmentof the Rockwell Type A Stored EnergyActuator, a new line of actuators for abroad range of globe and gate Valves forcritical service applications in nuclearpower plant feedwater and steam program included preliminary testingof a prototype as well as a thoroughqualification test on a r
Edward Valves The Rockwell Type A Stored Energy Actuator – Development and Qualification V-Rep 80-3
Loading..
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: