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Design, Principles & Operation of Valves and Control Valves
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Course introduction
Before you start this course
Learning objectives
Introduction
Valve body
Valve bonnet
Valve trim
Disk and seat
Stem
Valve actuator
Valve packing
Introduction to the types of valves
Learning objectives
Gate valves
Gate valves : 3D dismantling
Gate valves : 2D dismantling
Gate valves : Disk design
Gate valves : Stem design
Gate valves : Seat design
Globe valves
Globe valves : 3D dismantling
Globe valves : 2D dismantling
Globe valves : Z-body design
Globe valves : Y-body design
Globe valves : Angle design
Globe valves : Disk design
Globe valves : Disk - Stem connections
Globe valves : Seat design
Globe valves : Direction of flow
Ball valves
Ball valves : Components
Ball valves : 3D dismantling
Ball valves : 2D dismantling
Ball valves : Actuators
Ball valves : Pros & Cons
Ball Valves : Port pattern
Ball valves : Valve materials
Ball valves : Stem design
Ball valves : Valve position
Plug valves
Plug valves : Valve components
Plug valves : 3D dismantling
Plug valves : 2D dismantling
Plug valves : Numerous designs
Plug valves : Plug designs
Plug valves : Multiport plug designs
Plug valves : Lubricated design
Plug valves : Non-Lubricated design
Plug valves : Gland design
Diaphragm valves
Diaphragm valves : 3D dismantling
Diaphragm valves : 2D dismantling
Diaphragm valves : Straight through & weir types
Diaphragm valves : Diaphragm construction
Diaphragm valves : Bonnet design
Pinch valves
Pinch valves : Body design
Butterfly valves
Butterfly valves : 3D dismantling
Butterfly valves : Seat design
Butterfly valves : Disk & Stem assembly
Needle valves
Needle valves : 3D dismantling
Needle valves : Valve applications
Needle valves : Body design
Needle valves : Stem packing
Check valves
Check valves : Swing
Swing check valves : 3D dismantling
Swing check valves : 2D dismantling
Assembling a swing check valve - 3D model
Tilting disk check valves
Lift check valves
Lift check valves : 3D dismantling
Lift check valves : 2D dismantling
Piston check valves
Butterfly check valves
Stop check valves
Relief and Safety valves
Safety valves
Safety valves : Pressure setting
Safety valves : 3D dismantling
Safety valves : 2D dismantling
Relief valves
Relief valves : Valve operation in 2D cross-sectional view
Relief valves : 3D dismantling
Relief valves : 2D dismantling
Control valves
Control valves : Trim arrangement
Control valves : Direction of action
Control valves : 3D dismantling
Control valves : 2D dismantling
Learning objectives
Introduction
Manual actuators
Electric motor actuators
Pneumatic actuators
Example 1 : Single acting / spring return actuators : Components & Operation
Example 2 : Single acting / spring return actuators : Components & Operation
Example 3 : Double acting actuators : Components & Operation
Example 4 : Double acting actuators : Components & Operation
From single acting to double acting actuator
From fail close (FC) to fail open (FO) single acting actuator
Hydraulic actuators
Self-actuated valves
Speed of power actuators
Valve position indication
Important notes
About this section
Introduction
Types of valves used in piping systems
Types of fittings used in piping systems
Pressure drop attributed to valves and fittings
Relationship of pressure drop to velocity of flow
Hydraulic resistance
Causes of head loss in valves and fittings
Equivalent length "L/D"
Resistance coefficient "K"
Resistance coef. K for pipelines, valves and fittings in series and in parallel
Flow coefficient "Cv"
Use of flow coefficient "Cv" for piping and components
Flow coefficient Cv for pipelines, valves and fittings in series and in parallel
Valves with reduced seats
PRACTICE SESSION: Valve resistance coef. "K" using Flow of Fluids Excel Workbook
Discharge of fluids through valves, fittings and pipe
About the Flow of Fluids Excel Workbook
About this section
Introduction
Valve components
Inherent characteristic curve
Installed characteristic curve
Pressure, Velocity and Energy profiles through a control valve
Cavitation, Choked Flow and Flashing
Sizing and selection
Sizing for INcompressible flow
Sizing for compressible flow
Conversion of Cv to Kv
About this section
Learning objectives
Valve symbols
Valve actuator symbols
Control valve designations
Standards and conventions for valve status
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ABOUT THE COURSE
Course introduction
Preview
Before you start this course
VALVES FUNCTIONS AND BASIC PARTS
Learning objectives
Preview
Introduction
Valve body
Valve bonnet
Valve trim
Disk and seat
Stem
Valve actuator
Valve packing
Preview
Introduction to the types of valves
TYPES OF VALVES
Learning objectives
Gate valves
Gate valves : 3D dismantling
Gate valves : 2D dismantling
Gate valves : Disk design
Gate valves : Stem design
Gate valves : Seat design
Globe valves
Globe valves : 3D dismantling
Globe valves : 2D dismantling
Globe valves : Z-body design
Globe valves : Y-body design
Globe valves : Angle design
Globe valves : Disk design
Globe valves : Disk - Stem connections
Globe valves : Seat design
Globe valves : Direction of flow
Ball valves
Ball valves : Components
Ball valves : 3D dismantling
Ball valves : 2D dismantling
Ball valves : Actuators
Ball valves : Pros & Cons
Ball Valves : Port pattern
Ball valves : Valve materials
Ball valves : Stem design
Ball valves : Valve position
Plug valves
Plug valves : Valve components
Plug valves : 3D dismantling
Plug valves : 2D dismantling
Plug valves : Numerous designs
Plug valves : Plug designs
Plug valves : Multiport plug designs
Plug valves : Lubricated design
Plug valves : Non-Lubricated design
Plug valves : Gland design
Diaphragm valves
Diaphragm valves : 3D dismantling
Diaphragm valves : 2D dismantling
Diaphragm valves : Straight through & weir types
Diaphragm valves : Diaphragm construction
Diaphragm valves : Bonnet design
Pinch valves
Pinch valves : Body design
Preview
Butterfly valves
Butterfly valves : 3D dismantling
Butterfly valves : Seat design
Butterfly valves : Disk & Stem assembly
Needle valves
Needle valves : 3D dismantling
Needle valves : Valve applications
Needle valves : Body design
Needle valves : Stem packing
Check valves
Check valves : Swing
Swing check valves : 3D dismantling
Swing check valves : 2D dismantling
Assembling a swing check valve - 3D model
Tilting disk check valves
Lift check valves
Lift check valves : 3D dismantling
Lift check valves : 2D dismantling
Piston check valves
Butterfly check valves
Stop check valves
Relief and Safety valves
Safety valves
Safety valves : Pressure setting
Safety valves : 3D dismantling
Safety valves : 2D dismantling
Relief valves
Relief valves : Valve operation in 2D cross-sectional view
Relief valves : 3D dismantling
Relief valves : 2D dismantling
Control valves
Control valves : Trim arrangement
Control valves : Direction of action
Control valves : 3D dismantling
Control valves : 2D dismantling
VALVE ACTUATORS
Learning objectives
Introduction
Manual actuators
Electric motor actuators
Pneumatic actuators
Example 1 : Single acting / spring return actuators : Components & Operation
Preview
Example 2 : Single acting / spring return actuators : Components & Operation
Example 3 : Double acting actuators : Components & Operation
Example 4 : Double acting actuators : Components & Operation
From single acting to double acting actuator
From fail close (FC) to fail open (FO) single acting actuator
Hydraulic actuators
Self-actuated valves
Speed of power actuators
Valve position indication
IMPORTANT NOTES BEFORE PROCEEDING TO NEXT SECTIONS
Important notes
FLOW OF FLUIDS THROUGH VALVES AND FITTINGS
About this section
Introduction
Types of valves used in piping systems
Types of fittings used in piping systems
Pressure drop attributed to valves and fittings
Relationship of pressure drop to velocity of flow
Hydraulic resistance
Causes of head loss in valves and fittings
Equivalent length "L/D"
Resistance coefficient "K"
Resistance coef. K for pipelines, valves and fittings in series and in parallel
Flow coefficient "Cv"
Use of flow coefficient "Cv" for piping and components
Preview
Flow coefficient Cv for pipelines, valves and fittings in series and in parallel
Valves with reduced seats
PRACTICE SESSION: Valve resistance coef. "K" using Flow of Fluids Excel Workbook
Discharge of fluids through valves, fittings and pipe
About the Flow of Fluids Excel Workbook
REGULATING FLOW WITH CONTROL VALVES
About this section
Introduction
Valve components
Inherent characteristic curve
Installed characteristic curve
Pressure, Velocity and Energy profiles through a control valve
Cavitation, Choked Flow and Flashing
Sizing and selection
Sizing for INcompressible flow
Sizing for compressible flow
Conversion of Cv to Kv
VALVE SYMBOLS USED IN ENGINEERING DRAWINGS P&ID's
About this section
Learning objectives
Valve symbols
Valve actuator symbols
Control valve designations
Standards and conventions for valve status
DOWNLOADABLE RESOURCES
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