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Technical & Engineering Yogyakarta

Control Valve and Sizing : Selection and Maintenance

Instructor by : Saripudin 

OBJECTIVE

• Understand what happens inside a control valve from basic fluid mechanics point of view
• Appreciate the difference between cavitation and flashing, and know what choked flow is
• Do simple calculations to determine CV values
• Recognise severe service applications and have an appreciation for the methods of tackling the problems associated with such applications
• Know about all the different types of control valves commonly in use and understand the relative advantages of each
• Choose between different characteristics on offer and specify seat leakage rates
• Size actuators for linear and rotary applications and know the relative advantages of pneumatic, hydraulic and electric types
• Have a basic understanding on how to select materials for bodies, trims, packing boxes, and gaskets
• Make use of a computer sizing program to assist with the selection of control valves
• Understand the failure modes for control valves and  demonstrate new approaches to troubleshooting

OUTLINE

1. Introduction To Control Valve  Theory

• Introduction
• Definition of a control valve
• Energy types
• What is happening inside a control valve
• Cavitation
• Flashing
• Choked Flow
• Valve Coefficient Cv

2. Diferent  Types Of  Control Valve

• Globe Valves
• Butterfly
• Eccentric disk
• Ball
• Rotary Plug
• Diaphragm and Pinch

3. Characteristic

• Equal Percent
• Linear
• Quick Opening
• Selection Method

4. High Pressure Drop Applications

• Cavitation Control
• Cavitation Elimination
• Low Noise
• Diffuser Plates
• Chokes
• Disk Stack Technology
• Pressure Balanced Trim

5. Use Of Computer Program For Valve Sizing

6. Example Of  High Pressure Drop Applications

• Water – pump bypass
• Steam – turbine bypass
• Gas – pressure reducing
• Oil – choke valve

7. Actuators

• Pneumatic
• Hydraulic
• Electric
• Sizing on Rotary Valves
• Sizing on Linear Valves
• Mounting Considerations
• Manual Overrides
• Accessories

8. Positioners

• Basic Principles
• Conventional Pneumatic
• Conventional Electro-Pneumatic
• Smart Positioners
• Feedback Options

9. Materials

• Body materials and pressure ratings
• Trim
• Packing
• Guides and gaskets

10.  Quality Standards

• ASME
• NACE
• ISO 9000/2000
• PED
• NAMUR

11. Installation / Maintenance

• Installation
• Commissioning
• Routine Maintenance

12.  Summary, Open Forum and Closing

PARTICIPANT

• Control Valve Specialists
• Plant Safety Specialists
• Instrumentation and Control Engineers and Technicians
• Electrical Engineers
• Project Engineers
• Process Control Engineers
• Consulting Engineers
• Maintenance Engineers and Technicians
• Maintenance Planners
•  Systems Engineers

TRAINING METHOD

Presentation

Discussion

Case Study

Evaluation

FACILITIES

Training Kit

Flash disk

Handout

Certificate

Lunch + 2 X Coffee Break

Souvenir

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