Pump mechanical seals static ring rubber seal failure information

Home > News > Pump mechanical seals static ring rubber seal failure information

News

2016-08-03 17:37:01: 　
Pump mechanical seals static ring rubber seal failure information

After installation of mechanical seals, generally the static test, observe leakage.

1. leakage no significant changes, the question: static and dynamic ring rubber seal problems.

2. There are significant changes in the amount of leakage, the question: is the dynamic and static ring friction problem.

3. The media leaks along the jet axis, problem: Problems ring rubber seal majority.

4. The media leaks to the surrounding water spray or leak from the cooling holes, the question: mostly static ring rubber seal failure.

Also, leak paths may also exist, but generally the difference between primary and secondary, as long as careful observation, familiar with the structure, will be able to judge correctly.

Pump mechanical seal after the static test, the high-speed rotation of the centrifugal force generated when the operation would inhibit media leaks. Therefore, the exclusion of commissioning mechanical seal leakage between the shaft and seal failure after cover, basically due to the dynamic and static ring friction caused by destruction.

Factors causing friction seal failure are:

1. operation, due to evacuation, cavitation, pressure - and other anomalies caused by large axial force, so dynamic and static ring contact surface separation;

2. When installing the mechanical seal excessive compression, resulting in serious vice Friction wear, abrasion;

3. tight rubber seal ring, spring can not adjust the amount of floating axially movable ring;

4. static ring rubber seal is too loose, when the axial float ring, stationary ring from the stationary ring seat;

5. The working medium is particulate matter, running into friction, testing dynamic and static ring seal faces;

6. The design selection is incorrect, the sealing face pressure low or sealing materials expand and contract and other large properties. The above phenomenon often appear in the test run, sometimes by properly adjusting the stationary ring seat and so be eliminated, but most need to re-entry, replace the seal.

Centrifugal sudden leak in operation a few are due to normal wear or end of life, but mostly due to changes in working conditions or large operation, maintenance, improper.

? evacuated cavitation pressure - or longer, resulting in seal damage;

? the actual output of the pump is small, a large number of media within the pump cycle, heat build-up, causing media gasification, resulting in seal failure;

? return flow is too large, leading to inhalation tube side of the container (tower, kettle, cans, pool) dregs at the bottom, damaging the seal;

? outage for a long time, no manual re-start when the disk drive, friction due to adhesions and tearing the sealing surface;

? corrosive media, polymeric, gumming substances increased;

? abrupt changes in ambient temperature;

? conditions frequently change or adjustment;

? sudden power failure or downtime and so on. Centrifugal sudden leak in normal operation, if not in time, tends to lead to more accidents or loss shall be seriously and take effective measures.

Pump mechanical seals static ring rubber seal failure information

After installation of mechanical seals, generally the static test, observe leakage.

1. leakage no significant changes, the question: static and dynamic ring rubber seal problems.

2. There are significant changes in the amount of leakage, the question: is the dynamic and static ring friction problem.

3. The media leaks along the jet axis, problem: Problems ring rubber seal majority.

4. The media leaks to the surrounding water spray or leak from the cooling holes, the question: mostly static ring rubber seal failure.

Also, leak paths may also exist, but generally the difference between primary and secondary, as long as careful observation, familiar with the structure, will be able to judge correctly.

Pump mechanical seal after the static test, the high-speed rotation of the centrifugal force generated when the operation would inhibit media leaks. Therefore, the exclusion of commissioning mechanical seal leakage between the shaft and seal failure after cover, basically due to the dynamic and static ring friction caused by destruction.

Factors causing friction seal failure are:

1. operation, due to evacuation, cavitation, pressure - and other anomalies caused by large axial force, so dynamic and static ring contact surface separation;

2. When installing the mechanical seal excessive compression, resulting in serious vice Friction wear, abrasion;

3. tight rubber seal ring, spring can not adjust the amount of floating axially movable ring;

4. static ring rubber seal is too loose, when the axial float ring, stationary ring from the stationary ring seat;

5. The working medium is particulate matter, running into friction, testing dynamic and static ring seal faces;

6. The design selection is incorrect, the sealing face pressure low or sealing materials expand and contract and other large properties. The above phenomenon often appear in the test run, sometimes by properly adjusting the stationary ring seat and so be eliminated, but most need to re-entry, replace the seal.

Centrifugal sudden leak in operation a few are due to normal wear or end of life, but mostly due to changes in working conditions or large operation, maintenance, improper.

? evacuated cavitation pressure - or longer, resulting in seal damage;

? the actual output of the pump is small, a large number of media within the pump cycle, heat build-up, causing media gasification, resulting in seal failure;

? return flow is too large, leading to inhalation tube side of the container (tower, kettle, cans, pool) dregs at the bottom, damaging the seal;

? outage for a long time, no manual re-start when the disk drive, friction due to adhesions and tearing the sealing surface;

? corrosive media, polymeric, gumming substances increased;

? abrupt changes in ambient temperature;

? conditions frequently change or adjustment;

? sudden power failure or downtime and so on. Centrifugal sudden leak in normal operation, if not in time, tends to lead to more accidents or loss shall be seriously and take effective measures.
Previous [Return Home] [Print] [Go Back] Next

Related Information