Pressure Valves

Code : O/42

Course Objectives

This course is meant for engineering as well as maintenance people. All aspects of Safety Relief Valves are included in the course


Course modules

Module 1: Terminology of Valve Types as Defined by ANSI b95.1

  • Safety relief valves
  • Conventional type
  • Balanced type
  • Pilot operated type

Module 2: Pressure Parts of a Safety Relief Valve

  • Pressure Relief Valve dimensional characteristics
  • Operational Characteristic of Pressure Relief Valves

Module 3: Valves Types

  • General Valves
  • Safety Valves

Module 4: Codes & Standards

  • Quality assurance to ASME & understanding of international standards
  • Understanding capacity testing
  • ASMI VIII, ASMI code section I, API 520, API 521, API STD 526 & API RP 527

Module 5: Valves Operation

  • Gases & vapors, Liquid & critical factors affecting performance
  • Discussions on major types of back pressures including the effects
  • Constant back pressureBuilt up back pressure
  • Superimposed back pressure
  • Effects on standard valves
  • Bellows valves & pilots general selection on manufactures catalog

Module 6: Maintenance

  • Reasons for Inspection
    • Provisions of safety
    • Condition of safety valves
  • Causes of Improper Use
    • Corrosion
    • Damage seat surface
    • Broken springs
    • Improper setting & testing
    • Plugging & sticking
    • Identification
    • Rough handling
    • Operating ressure
  • Pre pop, Strip, Machine, Lap, Build & Test
    • Pre- testing of valve to be overhauled
    • Dismantling, Inspection
    • Machining of the disk
    • Machining of the Nozzle
    • General machining
    • Lapping by hand
    • Lapping by blocks
    • Reconditioning plates
    • Lapping procedures
    • Micro finshing of valve surface

Module 7: Assembling Valves after Cleaning

  • Adjusting & testing
  • Test Stand Procedures
  • Test apparatus
  • Leakage rates APT 527 body & bellow test
  • Cold different test
  • Spring setting
  • Changing set pressure
  • Ring setting

Target Audience

This course is designed for Instrument Engineers.

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