Advanced Valve Technology Course

Advanced Valve Technology Course Content:

 

BASICS OF THE VALVE TECHNOLOGY VALVES TECHNOLOGY

• Types of Valves
• Valves characteristics
• Sealing performance

o Leakage Criterion   

o Leakage Classifications

o Sealing Mechanisms

o Valve stem seals

• Flow characteristics

o Flow through valves

o Valve flow characteristics

• Linear & equal %

 

MANUAL VERSUS AUTOMATIC VALVES MANUAL VALVES

• Functions of manual valves
• Methods of regulation
• Valve Types:

o Stopping/starting valves

o Control valves

• Valve end connections
• Valves rating Valves seating Types of manual valves

o Gate Valves

o Plug Valves

o Ball Valves

0 Butterfly Valves

o Pinch Valves

o Diaphragm Valves CHECK VALVES

• Applications
• Types of Check Valves

o Lift check valves

o Swing check valves

o Tilting-disc check valves

o Diaphragm check valve

• Check Valves Operation
• Selection of Check Valves

RELIEF AND SAFETY VALVES: FUNCTION AND OPERATION RELIEF AND SAFETY VALVES

• Relief Valves Types

o Pressure-relieving devices o Automatically operated valves

o Direct-acting & piloted pressure relief valves

O Modulating, full-lift, and ordinary pressure relief valves

• Valve Loading
• Safety Valves
• Operation of Direct-acting pressure relief valves
• Blowdown
• Relief valves problems RUPTURE VALVES
• Applications of Rupture Discs
• Rupture discs vs. Pressure relief valves
• Rupture discs in gases and liquid service
• Temperature and bursting pressure relationship
• Pressure tolerances
• Design and performance of ductile metal rupture discs
• Types of Rupture discs:

o Prebsulged rupture discs

o Reverse buckling discs

O Vent panels

O Graphite rupture discs

o Double disc assemblies

• Rupture disc and pressure relief valve combinations
• Selection of rupture discs
• Operation of Rupture Discs

 

VALVES TROUBLESHOOTING VALVES PROBLEMS, AND TROUBLESHOOTING

• High Pressure Drop

o Pressure Recovery Characteristics

• Cavitation in Valves

o Incipient and choked cavitation

o Flow curve cavitation index

o Cavitation-elimination devices

• Flashing versus Cavitation
• Flow Choking
• High Velocities
• Water Hammer

o What causes water hammer?

o Water Hammer Calculations

o Solutions for water hammer

• Surge Protection
• Check valve slamming
• Noise problems
• Clean air standards
• Life loading
• Packing for fugitive-emission control
• Troubleshooting the Control Valves CONTROL VALVES & ACTUATORS
• Control Valves Types
• Linear Valve Features
• Rotary Valve Features
• Control Valve Flow Characteristics

o Quick Opening Characteristics

o Linear & Equal

• Actuation systems
• Types of actuators

o Pneumatic Piston Actuator

o Electric motors

o Electrohydraulic Actuators

• Actuator Performance
• Valve Positioner
• Operation of Positioners

o Positioner calibration

 

VALVE SIZING AND SELECTION VALVE SIZING & SELECTION

• Valve-sizing criteria for manual valves
• Valve-sizing criteria for check valves
• Valve-sizing criteria for throttling valves Incipient and advanced cavitation
• Terminal pressure drop ratio
• Percent of Flashing
• Pressure Recovery Coefficient
• Valve Sizing & Selection Procedure Selecting a valve type
•  Different valves characteristics

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