present location :


The pump and driver are not aligned&emdash;causing excessive seal movement.
Pipe strain.
Thermal growth.
Bad installation techniques that can injure a seal component.
The wrong lubricant was put on the dynamic elastomer.
The impeller clearance was set after the seal installation.
The face is inserted backwards, only one side is lapped.
The seal is set at the wrong installation length.
The sleeve moved when the impeller was tightened to the shaft.
A lubricant was put on the seal face that froze when the product evaporated across the lapped faces.
The rotating assembly is not dynamically balanced.
The shaft is bent.
The sleeve is not concentric to the shaft.
Impeller clearance is not being maintained, causing vibration problems.
The impeller is positioned too close to the cutwater.
The seal has been set screwed to a hardened shaft.
No seal or gasket between the shaft sleeve and the solid shaft. This is a big problem with double ended pumps.
The seal environmental control is not being maintained.
Flushing fluid is being restricted or shut off.
Quenching steam is shut off.
The barrier fluid tank level is too low
The convection tank is running backwards.
The cooling jacket is restricted due to a calcium build up.
You are running both a discharge recirculation line and a cooling jacket.
Out of tolerance shaft dimensions will restrict seal movement.
The impeller clearance was made without re-adjusting the seal face load.
The shaft sleeve was removed to accommodate a smaller diameter seal. The sleeve was providing corrosion resistance.
A gasket is protruding into the stuffing box restricting the seal movement.

Pumps Series