Mechanical seal for kettle Common faults and solutions

1. Fault phenomenon: leakage occurs at the sealing surface. Fault cause: screw thread is loose; The sealing surface is damaged. Troubleshooting: Retighten the screw; Regrind and polish the sealing surface.

2. Fault phenomenon: there is leakage at the valve. Cause of fault: the valve rod (needle) and valve port sealing surface are damaged. Troubleshooting: repair and replace the valve rod (needle) and valve port.  

3. Fault phenomenon: the external magnetic steel rotates, the internal magnetic steel does not rotate, and the motor current decreases. Cause of fault: the temperature rise in the kettle is too high, the cooling cycle is not smooth, and the internal magnetic steel is demagnetized due to high temperature. During hydrogenation reaction, the inner magnetic steel sleeve was cracked and the inner magnetic steel expanded. Troubleshooting: inform the supplier to replace the inner magnetic steel.

4. Fault phenomenon: There is friction noise in the magnetic coupling driver. Cause of fault: the shaft sleeve and bearing are worn, the clearance is too large, and the internal magnetic steel rotates and jumps. Troubleshooting: contact the supplier or Mechanical seal manufacturer Contact and replace the bearing and shaft sleeve.

In order to reduce failures, the following items should be noted when the kettle mechanical seals are installed and used:

1. During installation, the air in the sealing chamber must be exhausted, especially for the double end face seal with sealing liquid. When restarting, the suction valve shall be opened first, and the motor shall not be started until the liquid (medium) enters the sealing chamber.

2. Before starting the equipment, check that the shaft resistance is normal and even, and no clamping stagnation is allowed.  

3. Before the equipment is operated, the sealing chamber must be filled with medium and kept well lubricated. Dry friction is strictly prohibited, which may lead to seal failure.

The above methods and precautions can effectively reduce many problems, so that we can better use the kettle mechanical seal.