Rotating joints for water supply and ventilation

What is the difference between ventilation rotary joint and water rotary joint? Literally speaking, ventilation rotary joint is also called gas slip ring, mainly used for compressed air and vacuum, while water rotary joint is usually called hydraulic slip ring, mainly used for water and fluid media.

In terms of materials, ventilation rotary joints are generally made of aluminum alloy materials, while water rotary joints are generally made of stainless steel. In order to prevent rust, stainless steel materials are used. The commonality between water and ventilation rotary joints is that each medium hole is independent of each other. No matter how the rotary joint rotates, the corresponding medium outlet will not change, forming a one-to-one correspondence. The upper and lower ends of the rotary joint are supported by high-precision bearings to support the rotation of the entire spindle. The connection method can be selected according to the working situation, and there are independent pipelines inside, which can be selected according to different working conditions to maximize efficiency. There are two precision bearings inside the rotary joint, which operate smoothly, persistently, reliably, firmly and flexibly, with a low friction coefficient, so it can operate at high speed.
Especially in recent years, equipment has been accelerating, and the rotating joint of the iron shell cannot reach the speed of the rotating joint of the copper shell. The copper shell rotary joint (also known as the H-type rotary joint) is supported by double bearings and can currently reach a maximum speed of 10000 revolutions per minute. Most high-speed rotary joints adopt this structure. The sealing element adopts fluororubber sealing to avoid leakage caused by aging and stiffness of the O-ring. The price of such a good product is similar to that of cast iron rotary joints. Which one should you choose? The same principle applies to stainless steel rotary joints. Just stainless steel has higher pressure resistance.