In a vacuum exhaust system, sealing steam to the turbine shaft labyrinth seals must be admitted to avoid loss of vacuum.

First of all the most important point: if the gas pipeline inner fire, immediately closed all into the hole, radiation tube and sealing pipe, and in general to pipe of steam to extinguish fire.

It is widely used to improve mechanical properties of iron-based powder metallurgy parts, defend causticity and air sealing by high-temperature steam treatment.