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INDUSTRIAL VALVES - Coggle Diagram

- - - - Cast iron gate valve – water, lubricant & low pressure steam services
      - Alloy gate valve – high temperature & high pressure services
      - Stainless steel gate valve – corrosive, high temperature & low temperature services
    - - Closed: Gate is placed across the pipe’s opening.
      - Open: Gate is raised completely out of the flow line.
    - - Use lubricant to moving parts
      - When closing a gate valve, operator should take care not to damage valve seats
  - - - Should never used in throttling
      - Most plug valve should be limited to temperature under 480°F.
  - - - Cast iron globe valve – water, lubricant & low pressure steam services
      - Bronze globe valve – low temperature & low pressure services
      - Stainless steel globe valve – corrosive, high temperature & low temperature services
  - - - Swing Check Valve
      - Lift Check Valve
      - Ball Check Valve
    - - Bronze check valve – low temperature & low pressure services
      - Brass check valve – low temperature & low pressure services
      - Alloy check valve – high temperature & high pressure services
  - - - Weir Diaphragm Valve
      - Nonweir Diaphragm Valve / Straight-through-diaphragm Valve
- - - - A valve selected for this purpose should give a positive seal in the closed position and minimum resistance to flow when open.
      - Valve commonly used for this purpose: Gate, plug and ball valves
    - - A valve selected for this purpose should be capable of giving smooth control over the full range of flow, from fully open to closed.
      - Valve commonly used for this purpose: Globe valve & Butterfly valve (often used for gas and vapour)