These aspects of mechanical seals how to do these problems

Graphite ring ( or ceramic ) fracture
PTFE o-ring friction is small , stationary ring with snap ring rotation , the contact pin after the break.
Symptoms at the pin groove cracking or destroyed a graphite ring .
Corrective measures making pin sets ; self-locking cable ties using other types of seals or static ring structure.
o-ring overheating
Usually because the heat conduction unfavorable end result .
Symptoms rubber ring hardening and cracking. PTFE blue or black. Near the seal face the worst .
Corrective measures checking seal design ; Check and improve circulation status .
o-ring extrusion
o-ring part is forced through a small gap . Assembly or assembly of components when the force is too large, or the sealing gap is too large .
Symptoms o-ring is cut or torn skin .
Corrective Action Check the assembly method .
o-ring corrosion, swelling
Symptoms inappropriate material selection occurs when swelling , fracture , deformation and other faults.
Corrective measures based on the actual conditions, re-select the material .
Graphite erosion ( element )
When the fluid pressure is too large or contains grinding particles .
Symptoms of flushing fluid inlet is on the element at a erosion pits .
Corrective measures to reduce the fluid pressure ; using hydrocyclones .
Evacuated
System pressure fluctuations or cavitation generated at the seal faces
Symptoms: plastic security seals the dregs at the end round and round Zhoucheng Bo striated , 0 laps extrusion, static ring from the bit .
Corrective Action: change the system operation process , increase the amount of rinse