The most important feature of the type Ehs is that the spring is not in contact with the sealed medium. It’s a balanced and bi-directional model. The balancing design is realized through the driving sleeve and therefore it’s not needed a stepped shaft.
It’s suitable for high pressure and for dirty or viscous liquids. It’s also easy to clean due to protected spring.
The Uniten version is full according with fitting dimensions of EN 12756 K version for unbalanced seals
–35 ÷ 230°C