Automatic Valve Symbol

The generic symbol for a 2 way valve is two triangles pointing to each other with the tips of the inner points touching.

Automatic valve symbol.

An engineer may also include specific details below the control valve symbol. Various types of lines are used to represent different pipes tubes and hoses. 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.

Plumbinghelp its affiliates and content licensors assume no liability for any inaccurate incomplete information or the outcome of any project. The next symbol is the excess flow valve. The information on this site is for informational purposes only. The last symbol is of automatic recirculation valve.

Here is a list of symbols for various types of valves used in process industry. Type of valve employed depends on nature of fluid flow control required operating pressure and temperatures as well as surround atmosphere. You can see that it is the same as a check valve with the only difference is the written text below the valve symbol. You have to be very careful while reading this type of symbol as it can easily overlook.

Commonly used valve p id symbols piping and instrumentation diagram symbols for manual valves. The pipe lines are represented by lines connecting to each side of the valve symbol. Valve symbols for p ids. Many types of valves are required in a process plant for flow regulation or on off purpose.

Note that they may differ slightly from one project to another.