Check the sealing surface wear trace still need to add the following, can help to analyze fault.

   Check the sealing surface wear trace still need to add the following, can help to analyze fault.
   1.The wear width: indicates that the pump serious misalignment. The reason is that:
   A.Bearing damage;
   B.Shaft vibration and axial deformation;
   C.Shaft bending;
   D.Cavitation generated vibration;
   E.Coupling misalignment;
   F.The serious deformation;
   G.Static seal ring tilt.

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   2.The wear scar narrowing: wear more than two sealing surface and minimum width narrow, indicating that the sealing pressure, pressure or temperature so that the sealing surface deformation.
   3.Without abrasion marks:
That the sealing surface without adhesive. Check spring compensation mechanism is slipping or obstructed.
   4.The sealing surface without abrasion marks but there are bright spots.
Sealing surface of warpage will appear bright and no wear scar. The pressure is too high, the gland bolts without twisting or not clamped, or pump surface roughness can form bright spot. When the cover with two bolt when, its stiffness is not enough, a cause of deformation is also formed highlights.
The emergence of such symptoms that may drive a car: seal leakage.
   5.the sealing surface with a cutting edge:
This is due to the sealing surface are too far apart, and the fracture during folding. Flash (gasification) is widely separated from the sealing surface, especially in the hot water system of condensate liquid or fluid, water from the expansion of liquid into vapor, can make the sealing surface separate.
   Metal parts are sealed, such as spring, fixed bolts, transmission parts and metal sleeve may become the source of seal failure. Under the action of the spring force of the alternating stress corrosion is the primary problem of it, because the metal rapid corrosion under stress, stress corrosion of steel spring susceptible to chloride not embroidered, and there are a lot of the world's chloride, so the foreign department suggests, do not use stainless steel spring, spring and recommend the Haast alloy steel using the corrosion resistance of high. In addition, improper assembly spring fatigue is another reason for failure.

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   Screw the use of mechanical seals, do not use hardened material to do, because of the heat treatment can reduce the corrosion resistance of metal, but not soft fixing screw heat treated can be fastened on the shaft.
   Vibration, oblique, not concentric will make the transmission parts wear, such as the sealing surface when starting stuck phenomenon, transmission parts can be bent or damaged, and the friction generated heat often aggravate corrosion.
Wear scar surface metal sleeve, possibly into the solid particle sleeve from sealing side caused by interference, it sealed follow-up capability. May also be skewed, the cause of the non concentric.
   The metal in the temperature rising process to change the color, so should pay attention to the temperature of the color in the use of.
Pale yellow -- -- temperature 700 ~ 800 degrees Fahrenheit (about 370 ~ 432 ℃)
Brown -- -- temperature 900 ~ 1000 degrees Fahrenheit (about 486 ~ 540 ℃)
Blue -- -- temperature of 1100 degrees F (590 degrees C)
Black -- -- temperature is 1200 degrees Fahrenheit (about 648 degrees).
   FLEX MECH-SEAL(CHINA) Co.,Ltd. is specialized in mechanical seals products including for auto cooling pump mechanical seals, for automobile air-compress mechanical seals,for pump mechanical seals and for industry pump mechanical seals，mechanical seal，shaft seal，Automobile seal，Pump seal，Flygt pump seal.