Full Bore Ball Valve Symbol

Emico ea 25 ball valves have independently witnessed fire tests to api 607 ed. Flow is unrestricted but the valve is larger and more expensive so this is only used where free flow is required for example in pipelines that require pigging. Type of valve employed depends on nature of fluid flow control required operating pressure and temperatures as well as surround atmosphere.

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Valves of sizes above 2 inches have a cast body the most common grades are astm a216 wcb for high temp.

Full bore ball valve symbol. 6 flanged 150 300 full port ball valves fig. Unrestricted bore designs nearly every 2 way dmic ball valves are designed with an unrestricted full bore the. So if a full port ball valve is fully open in a piping schematic and you look down the pipe you will not be able to see any restrictions in the pipe. These tests were performed and witnessed by tuv rheinland taiwan mirdc.

A full port or more commonly known full bore ball valve has an over sized ball so that the hole in the ball is the same size as the pipeline resulting in lower friction loss. Here is a list of symbols for various types of valves used in process industry. A full port valve specification refers to the bore of the valve having no restriction in the piping. Diaphragm valves t design 3 2 way 18 ball valves straight through 2 2 way 20 angle seat 2 2 way 12 sample schematic example 5 symbols for accessories 8 symbols for position and process controllers for process valves 10 globe valves straight through diaphragm valves full bore 2 2 way 19 ball valves multi port 3 2 way with t passage 21.

Ball valves in the stockroom and in the circuit valves are factory coded according to the port thread. The series 53 54 is worcester s range of metric integrally flanged valves conforming to din 3202. Butterfly valve symbol is the only symbol where a full triangle is not used. The alternative symbol is clearer in this case.

Examples of forged ball valves small size and stainless steel valve with a forged body trunnion mounted. Reduced bore valve the i d of the valve is smaller than the id of the pipe. A brief explanation as this article is more focused on the section of full or reduced bore type of valves. If you refer the first symbol it is similar to a globe valve but a triangle is not full.

Full bore valve the i d of the valve is equal to the id of the pipe. 5 7 iso 10497 5. Many types of valves are required in a process plant for flow regulation or on off purpose. Industrial ball valves and actuators has adopted a policy of continuous development in technology expertise and service and has produced a range of reliable products which perform in virtually any fluid control service throughout the world.

1 ball body contact contact between the ball and the fire safe lip of the body. Refer below picture to get more clarity. Service astm a352 for low temperature service and astm a351 cf8 cf8m for cast stainless steel valves. Covers internal leakage.