Control Valve Sizing, Selection, and

Maintenance Course

CONTENT SUMMARY

REGISTRATION

INTRODUCTION TO CONTROL VALVE THEORY

§         Introduction

§         Definition of a Control Valve

§         Energy Type

§         What is happening inside a control valve

§         Cavitation

§         Flashing

§         Choked Flow

§         Valve Coefficient Cv

DIFFERENT TYPES OF CONTROL VALVES

§         Globe Valves

§         Butterfly

§         Eccentric disk

§         Ball

§         Rotary Plug

§         Diaphragm and Pinch

CHARACTERISTICS

§         Equal percent

§         Linear

§         Quick opening

§         Selection method

HIGH PRESSURE DROP APPLICATION

§         Cavitation Control

§         Cavitation Elimination

§         Low Noise

§         Diffuser Plates

§         Chokes

§         Disk Stack Technology

§         Pressure Balance Trim

USE OF COMPUTER PROGRAM FOR VALVE SIZING

EXAMPLE OF HIGH PRESSURE DROP APPLICATIONS

§         Water – pump bypass

§         Steam – turbine bypass

§         Gas – pressure reducing

§         Oil – choke valve

ACTUATORS

§         Pneumatic

§         Hydraulic

§         Electric

§         Sizing on rotary valves

§         Sizing on linear valves

§         Mounting considerations

§         Manual overrides

§         Accessories

POSITIONERS

§         Basic Principles

§         Conventional pneumatic

§         Conventional electro-pneumatic

§         Smart Positioners

§         Feedback options

PNEUMATIC CIRCUITS

§         Volume tank fail system

§         Fail fix

§         Volume boosters

MATERIALS

§         Body materials and pressure ratings

§         Trim

§         Packing

§         Guides and gaskets

QUALITY STANDARDS

§         ASME

§         NACE

§         ISO 9000/2000

§         PED

§         NAMUR

INSTALLATION / MAINTENANCE

§         Installation

§         Commissioning

§         Routine Maintenance

§         Fault finding

§         Modes of failure

SUMMARY & OPEN FORUM

CLOSING