It is a double pressurized back-to-back compact and BIDIRECTIONAL multi-spring seal. Of easy mounting, it may be supplied in materials that are available to TYPE 2 and 4. In the 822 version all gaskets are in elastomer (O-Rings), while in the 844 version they are all in PTFE. In order to use this model, you must provide an auxiliary liquid circulation with higher pressure than that of the sealed fluid.
–35 ÷ 180°C