What is the difference between a butterfly head and an elliptical head? What are the differences in application scenarios?

Butterfly heads and elliptical heads are two different types of heads. A butterfly head is shaped like a butterfly’s wing, whereas an elliptical head has an oval shape. In terms of application areas, due to their different shapes, their applicable fields also vary. Butterfly heads are particularly suitable when it is necessary to remove items from the interior container, such as in mixing tanks, reactors, etc. Elliptical heads are more suitable for the top or bottom of pressure vessels, such as storage tanks and heating kettles. Regarding whether butterfly heads can be used in pressure vessels, it is actually not recommended, as their structure is relatively complex and they are not suitable for withstanding high pressures. If it is to be used in pressure vessels, it is recommended to choose an elliptical head. Regarding the specific load-bearing capacity, it is necessary to carry out calculations and make selections based on the actual conditions. .

For the same specifications and thickness, elliptical end caps require more material than butterfly end caps; they have greater depth and volume, as well as better stress resistance. All can be used for pressure vessels.