Five moves Mechanical seal for kettle Water leakage of parts

The feature of mechanical seals is that they can be used for all kinds of equipment, especially equipment such as reactors and pumps. Because such equipment has high sealing requirements and can not contain impurities, they are used more frequently. The problem of water leakage is really worrying. Water leakage causes poor sealing effect of sealing elements. This is a taboo for many people. The following five tips can help you easily solve the problem of seal leakage:

1、 Cause

1. The equipment is too tight. Check the dynamic ring plane of the mechanical seal. If there is serious burning appearance, the plane is blackened and has deep traces. The pump mechanical seal rubber becomes hard and loses elasticity. This appearance is caused by the equipment being too tight.

2. The device is too loose. Check the plane of the moving and stationary rings of the mechanical seal. There is a thin layer of scale on the surface, which can be wiped off, and the surface is basically free of wear. This is caused by the loss of elasticity of the spring, poor equipment, or axial displacement of the motor.

3. The water quality is poor. Due to poor water quality Cartridge mechanical seal Parts are rich in small particles and high in the content of hydrochloric acid in the medium, which form the appearance of grooves and ring grooves on the flat or strained surface of the abrasive wear mechanical seal.

4. Dry grinding damage is caused by water shortage operation. This appearance is mostly seen at the negative pressure at the inlet of the bottom valve type equipment, there is air in the water inlet pipe, and there is air in the pump chamber. After the pump is started, the friction of the mechanical seal occurs high temperature during high-speed operation, and it cannot be cooled. Check the mechanical seal, the spring tension is normal, the contact surface is scorched and black, and the rubber becomes hard and cracked.

5. Cavitation. Cavitation mainly occurs in the hot water pump. Because the medium is hot water, and steam occurs when the water temperature is too high, the steam in the pipeline enters the high place in the pump chamber, and this part of the steam cannot be cleaned, which then constitutes a water shortage operation, the mechanical seal dry mill fails, and the cavitation is installed with an automatic exhaust valve and an exchange.

2、 Resolve

1. Solution: adjust the height of the equipment. After the impeller equipment is installed, pull the spring with a screwdriver. The spring has a strong tension, and it will be reset after loosening, with a travel distance of 2 to 4 mm.

2. Adjust the height of the mechanical seal and reset the spring.

3. Improve water pressure or medium, and seal the exchanger.

4. Exhaust the air in the pipe and pump chamber, and exchange the mechanical seal.

5. Try not to use hot water.

The leakage of mechanical seals is not a trivial matter, and it will lead to failure if it is not handled properly. Therefore, we must find out the cause of this problem in time. Don't litter about. The other is to use seals under appropriate conditions. The other is to maintain clean water quality.