Flexible Tube for Rotary Joint

Flexible Tube for Rotary Joint

Flexible tube is frequently installed between rotary joint and piping, serving as an indispensable and critical component within industrial piping systems. The rotary joint itself needs to be able to rotate, and it also needs to rotate in the machine equipment to transmit the medium. This will result in errors over time. In order to compensate for errors and ensure production safety, the joint cannot be directly connected to the equipment, and a flexible tube must be used in between.

Installation precautions for Flexible Tube

When installing a rotary joint, sometimes a metal hose is connected to one end of the joint, and sometimes a metal hose is used as a soft connection at both ends. The metal hose has strong flexibility, allowing the rotary joint to fully distribute the flow of the medium. When installing a rotary joint, ensure that the length of the flexible tube is neither excessively long nor too short. After installation, except for the H series rotary joints, all other joints require the installation of anti-rotation support devices to prevent the flexible tube from failing prematurely due to stress caused by instantaneous starting torque. It is also forbidden to use flexible tube or rubber hoses to replace anti-rotation supports to counteract friction torque.

Why Are Flexible Tube Required for Rotary Joints?

Regardless of the model of the rotary joint, one principle must be followed during installation: rigid connections are prohibited; use flexible tube for transition.

• Flexible tube is used to compensate for deviations such as concentricity, displacement, and skewness between the fluid transport pipeline and the rotary joint connection.

• To compensate for axial displacement resulting from wear on the rotary joint during installation and operation, as well as displacement caused by thermal expansion and contraction induced by temperature fluctuations.

• To minimize or eliminate the adverse effects that factors such as shaft alignment errors, perpendicularity deviations, equipment vibration, and lateral runout may have on the sealing integrity and service life of the rotary joint during installation and operation.

• The flexible tube can reduce and weaken the vibration caused by the pressure pulse of the conveying fluid and the vibration caused by the equipment during operation.

Rotary Joint Flexible Tube Types and Parameter