S140 - Relief Valve Maintenance

This 2-day course uses lectures and examples to explain the correct procedure for valve maintenance. 

• Valve nomenclature and definitions
• ASME code requirements
• Pressure-level relationship
• Valve maintenance
• Valve disassembly and inspection
• Test bench technique; air, steam and water
• Cold differential testing
• Pilot valve testing
• Adjustments for blowdown
• Ring locations effects
• Bench teardown of valves
• Parts inspection & critical dimension measurement
• Remachining of nozzles
• Maintenance problems and remedies
• Discussion on "do’s" and "don't's"
• Quiz on safety and safety relief valves