Description

A rotary union is a union that allows for rotation of the united parts. It is thus a device that provides a seal between a stationary supply passage (such as pipe or tubing) and a rotating part (such as a drum, cylinder, or spindle) to permit the flow of a fluid into and/or out of the rotating part. Fluids typically used with rotary joints and rotating unions include various heat transfer media and fluid power media such as steam, water,thermal oil,hydraulic fluid and coolants.A rotary union is sometimes referred to as a rotating union, rotary valve, roto seal,rotary couplings,rotary joint,rotating joints,hydraulic coupling, pneumatic rotary union,through bore rotary union,air rotary union,vacuum rotary union.

A rotary union will lock onto an input valve while rotating to meet an outlet. During this time the liquid and/or gas will flow into the rotary union from its source and will be held within the device during its movement. This liquid and/or gas will leave the union when the valve openings meet during rotation and more liquid and/or gas will flow into the union again for the next rotation. Often functioning under high pressure and constant movement a rotary union is designed to rotate around an axis. A rotary union’s design can be altered to change this or to increase the psi or rpm it needs to withstand as well as the number of valves required.

Rotary unions are also heavily used in Various Industries Like crude oil processing,the chemical industry,commercial food production,Paper,Plastics,Printings,Steel,pharmaceutical applications etc.