The Most Common Control Valve Symbols on a P&ID

The control valve symbols on a P&ID differ depending on the type of valve specified for the application. In this article, we will identify the most commonly used control valve symbols.

Piping and Instrumentation Diagram (P&ID)

Before the completion of a well, a Facilities Engineer creates a diagram of all the piping and instrumentation designated for use in the production of the well. This is called a “Piping and Instrumentation Diagram” and is usually shortened to “P&ID.”

Upon the completion and approval of the P&ID, it then moves to a Purchasing Department. This department is responsible for getting this information to various equipment vendors, requesting quotes, and purchasing equipment for the well.

Vendors then manufacture, package, and ship the equipment to the production site. On site, a combination of Production Superintendents, Foremen, Lease Operators, and crews of Pumpers and Roustabouts install the equipment in accordance with the P&ID.

The Standard Control Valve Symbol

Each P&ID has its own legend that identifies the symbols for the various equipment.

While there is some variation, examples of the standard symbols for control valves are in the PDF below.

Symbols include:

  • gate valve symbol
  • globe valve symbol
  • ball valve symbol
  • plug valve symbol
  • butterfly valve symbol
  • diaphragm valve symbol
  • check valve symbol

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An engineer may also include specific details below the control valve symbol. These details may include the size, function, pressure rating, and connection type of the valve.

For example, the note 2? 300 RF PB indicates that the P&ID calls for this valve to be a 2? ANSI 300 Raised Face Piston-Balanced valve.

If you have questions about what type of valve you need, reach out to your local Kimray store or authorized distributor.