Transcription of BASIC OPERATION AND FUNCTION OF CONTROL VALVES
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BASIC OPERATION AND FUNCTION OF CONTROL VALVES
BASICBASICOPERATIONOPERATIONANDANDFUNCTI ONFUNCTIONOFOFCONTROLCONTROLVALVESVALVES 02-99- 2 -That valvedrives me crazy!??What ishappening insidethat valve??Gaskets Won't seal !Unusually HighTrim Maintenance!!Packing Always Leaks!NOISY!!VIBRATING!!Positioner AlwaysNeeds Calibration!Too much seat leakage!LOUSY CONTROL !RATTLING!Table of ContentsTOPIC - SUBJECTSECTIONT erminology------------------------------ -------------------------------- 1 CONTROL Valve BASIC Designs --------------------------------------- 2 Characterization and Trim Design -------------------------------- 3 CONTROL Valve Technical Considerations ----------------------- 4 Force-Balance Principle ---------------------------------------- ----- 5 Actuator BASIC Designs ---------------------------------------- ------ 6 CONTROL Valve Unit Action ---------------------------------------- --- 7 Actuator Benchset Range ---------------------------------------- --- 8 Valve Positioner Basics ---------------------------------------- ------ 9 CONTROL Loop Action ---------------------------------------- ---------- 10 CONTROL Valve Packing Designs ----------------------------------- 11 Seat Leakage ---------------------------------------- -------------------- 12- 3 -SECTION 1 Terminology- 4 - CONTROL VALVE TERMINOLOGY(per )
dual sealing valve: A valve that uses a resilient seating material for the primary seal and a metal-to-metal seat for a secondary seal. end connection: The configuration provided to make a joint with the pipe. - end connections, flanged: Valve body with end connections incorporating flanges that mate with cor-responding flanges on the piping.
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