4 aspects that cause valve seal failure
The main causes of valve seal failure are the following.
1. Natural failure
Since the seal is always in the medium, the valve seal fails after the seal element has reached the end of its service life.
2, the pump inlet pressure fluctuations may cause seal damage
When the inlet pressure of the pump is too small, the pressure in the pump chamber suddenly decreases, and the liquid in the sealed chamber is returned to the pump chamber, causing the sealing surface to dry. The sealing surface generates a huge amount of heat in a short time and cannot be taken away, thereby causing the sealing surface to burn out and the sealing failure; When the pump inlet pressure is too high, the valve seal fails when the seal chamber pressure rises above the limit that the seal can withstand.
3. Seal failure caused by insufficient seal flushing
The sealing mainly acts as a barrier to the sealing cavity medium by forming a liquid film on the sealing surface. The function of the sealing rinsing liquid is mainly to take away the heat at the sealing surface, when the sealing rinsing liquid is insufficient or there is a huge amount of heat in the sealing cavity, This in turn causes the sealing surface to burn out and the seal to fail. Media interruption in the pump chamber, sudden decrease in pressure in the seal chamber, and sudden damage to the seal effect ring may result in insufficient seal flushing.
4, seal failure caused by bearing damage
After the bearing is damaged, the position of the rolling element changes, and the vibration of the pump increases, causing the valve seal to fail.
The main causes of valve seal failure are the following.
1. Natural failure
Since the seal is always in the medium, the valve seal fails after the seal element has reached the end of its service life.
2, the pump inlet pressure fluctuations may cause seal damage
When the inlet pressure of the pump is too small, the pressure in the pump chamber suddenly decreases, and the liquid in the sealed chamber is returned to the pump chamber, causing the sealing surface to dry. The sealing surface generates a huge amount of heat in a short time and cannot be taken away, thereby causing the sealing surface to burn out and the sealing failure; When the pump inlet pressure is too high, the valve seal fails when the seal chamber pressure rises above the limit that the seal can withstand.
3. Seal failure caused by insufficient seal flushing
The sealing mainly acts as a barrier to the sealing cavity medium by forming a liquid film on the sealing surface. The function of the sealing rinsing liquid is mainly to take away the heat at the sealing surface, when the sealing rinsing liquid is insufficient or there is a huge amount of heat in the sealing cavity, This in turn causes the sealing surface to burn out and the seal to fail. Media interruption in the pump chamber, sudden decrease in pressure in the seal chamber, and sudden damage to the seal effect ring may result in insufficient seal flushing.
4, seal failure caused by bearing damage
After the bearing is damaged, the position of the rolling element changes, and the vibration of the pump increases, causing the valve seal to fail.
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