OTSV001 VALVES 20-24 September - Mechanical
Time & Location
About the Event
The purpose of this course is to improve technician performance both in practical terms and in underpinning knowledge.
The course will cover the subjects described on the enclosed syllabus. The course will comprise practical and theoretical instruction. The purpose of this course is to improve technician performance both in practical terms and in underpinning knowledge. Each trainee will benefit from the latest technologies, taught both practically and by formal lecture/demonstration.
Assessment will be by practical assignments and simulations. Valve positioners will also be taught along with split-range control systems. Each trainee will carry out the practical tasks of stroke checking a pneumatic valve, mounting a positioner and calibrating a positioner.
Who should attend
This course is aimed at those maintenance technicians that require knowledge of the maintenance aspects of a variety of valve types.
All Attendees should have a sound power generation and electrical background.
At the end of this course you will be able to maintain valves.
Introduction to Valves
Types of valves
Globe valves and piston operated valves
Choke and throttling valves
Types of Valves (operating details)
Cage guided globe valves
Stem and post guided globe valves
V-notch ball segment valves
Eccentric rotary plug valves
Eccentric disk butterfly valves
Pressure drop ratings
Cavitation & flashing
Identify the parts of an actuator and valve assembly
The actuator data plate
The Single Acting Positioner
Identify the parts of a positioner
Advantages of the positioner
Using the manufacturers manual
Operation of a Pneumatic Diaphragm Valve & Positioner
Direct and indirect operation
The bellows & flapper
The relay unit
Mount and stroke a valve actuator.
General maintenance procedure for a valve actuator
Mount a Positioner
Using vendor manual, mount a positioner to the actuator.
Calibrate the positioner
General maintenance procedure for a valve positioner
The Piston Operated Valve
Construction of a piston operated valve
Operation of a piston operated valve
General maintenance procedure for a piston operated valve
Maintenance & Serviceability
Maintenance of globe valves
Maintenance of Rotary valves
Removal from pipeline for servicing a rotary valve
Separating the valve body from the actuator for servicing a globe valve
Other maintenance considerations
The needle valve
Safety & relief valves
None return valves
Gauge cock valve
Split Range Control
Reasons for using split range control
Furnace fuel control system
Advantages of split range control
Valves & Safety
Fail safe positions
The solenoid valve
Air Fail Open and Air Fail Close valve systems