Start Date : 9 Mar ,2025
End Date : 13 Mar ,2025
Duration : 5 Days
Overview:
Power Plant and other petrochemical industries do deal with different types of valves. All piping systems are fitted with valves for controlling purposes or safety requirements. Understanding the function of each valve type will have an important reflection on the process quality, equipment and plant reliability, and the economics of the whole activity. Different application needs to select the appropriate valve type of a particular flow characteristics. Operation of the valve also affects the system and the process. Understanding the problems associated with valves is essential for diagnosis and troubleshooting and the needed maintenance for the particular type of valves.
Course Objectives:
An understanding of valve characteristics and different parameters affecting the operation of valves
Knowledge of the main types of valves and the ability to select the right valve for the particular application including Control Valves, Non-Return Valves and Safety Valves
The ability to perform the necessary calculation for valve sizing
Knowledge of valve control systems including actuators and positioners
An understanding of the problems associated with valves like flashing, slamming and water hammer
The ability to perform troubleshooting of systems involving valves and making decisions on the right maintenance plan concerning different types of valves
Course Content:
1. Basic of the Valve Technology
Types of Valves and Selection
Valve Parts and Components
Valve Flow characteristics – Linear Valve Features
Control Valve Flow Characteristics – Quick Opening, Linear, Equal Percentage
Valve-sizing criteria – Valve Coefficient, Cv
Pressure Recovery
2. Valve Functions and Types
Functions of valves and Methods of regulation
Valve Types – Stopping / starting valves, Control valves
Valve end connections
Valve components and trims
Types of valves, Globe, Gate, Ball, Plug, Butterfly Valves, Pinch, Diaphragm Valves
Pressure Regulation Valves
3. Check (Non-Return) Valves, Relief and Safety Valves
Applications and selection of Check (Non-Return) Valves
Types of Check Valves – Swing, Lift, Tilting-disc, Piston
Rupture Disk Valves
Buckling (Shear) Pin Valves
Relief and Safety Valves Types
Relief Valves Problems
4. Control Valve Actuators and Positioners
Actuation Systems and Forces
Linear and Rotary Actuators
Types of Actuators – Pneumatic / Hydraulic, Piston, Diaphragm, Electric motors
Actuator Performance and Selection
Valve Positioners and Operation
Examples of valve installation plans and checklists
5. Valve Troubleshooting
High Pressure Drop – Pressure Recovery Characteristics
Cavitation and Flashing in Valves – Cavitation-elimination devices
High Velocities – Erosion
Water Hammer – Causes and Solutions
Surge Protection
Noise Attenuation Problems
Troubleshooting the Control Valves
Valve Inspection & Testing (API598)
Targeted Audience:
Instrumentation, electrical, mechanical, process and maintenance engineers, specialists and staff
Design teams
Budgeting and financial staff
Team leaders, supervisors and foremen
