1. One-way flow-type rotary joints are installed at both ends of the drum. The fluid enters from one end and is discharged from the other end. The inner tube is not used.
2. Bidirectional flow type (inner tube fixed) Install a rotary joint on one end of the drum, and at the same time introduce and discharge fluid at this end. The rotation of the inner tube relative to the drum is stationary.
3. Two-way flow-type rotary joint (inner tube fixed) The difference from the previous one is that different types of siphons are installed in the drum to discharge the condensate. This type is mostly used for steam types.
4. Two-way flow type (inner tube rotation) This type is used for the structure in which the inner tube is relatively fixed to the drum and runs synchronously with the drum. At this time, the fluid is introduced into the inner tube and the outer tube is discharged.
5. Two-way flow-type rotary joint (inner tube rotation) The inside of the drum is equipped with a siphon that runs synchronously with the drum to discharge the condensate. This type is mostly used for steam types.