Rotary joint also known as rotating joint, rotary union, swivel joint etc. are a system of dynamical sealings. The rotary joint is a mechanical device that allows transfer of working medium from a stationary source (stationary supply pipe) to a rotating machinery (cylinder, drum, roll or spindle) for cooling, heating or transfer of fluid power.

Rotary joint are used in the following industries:

• Steel industry,
• Paper industry,
• Rubber industry,
• Textile industry,
• Plastic industry,
• Corrugating industry,
• Food and Medical industry,
• Converting industry,
• Printing industry,
• Oil and Gas industry and
• Renewable energy.