This course consists of two Lessons, Gate Valve Repair and Globe Valve Repair. Topics include identifying valve parts and functions, valve inspection, valve assembly and disassembly, and valve positions.
Objective
Identify the parts of a gate valve and describe their functions
Inspect a valve and make adjustments to stop leakage
Position rising stem and non-rising stem valves to the half-open position
Remove and disassemble the bonnet assembly of a gate valve
Use a telescoping gauge to determine if a stuffing box is round
Perform a runout to determine if a stem is bent
Use an outside micrometer to determine if the stem has excessive wear
Lap a disc and perform a contact check of disc mating surfaces
Reassemble the bonnet assembly of a gate valve
Perform a contact check to determine if there is a proper seal between the seat and disc of a gate valve
Identify the basic components of a typical globe valve
Disassemble and inspect a globe valve for damage
Describe what lapping is and explain when it is used
Complete a dye check
Reassemble a globe valve
Identify the basic components of a typical control valve
Disassemble and inspect a control valve for damage