Mounting height adjustment during installation

Mechanical seal itself is of good quality and is a necessary prerequisite to avoid leakage occurs , which the mechanical seal factory static ring friction surface finish put forward higher request . In addition , other components of the centrifugal pump precision use of mechanical seals also plays a key role . Following situations are discussed from the mechanical seal leakage of the specific causes and treatment methods .
Install tight . Observe the movement mechanical seal ring plane , if severe burning phenomenon , flat black and deep traces of sealing rubber hardens , loss of elasticity , this phenomenon is caused due to the installation tight . 

Mounting height adjustment during installation , impeller installed, use a screwdriver to pull the spring , there is a strong tension spring , after the reset release , there are 2-4MM moving distance can be.
Installing too loose . Observe the mechanical seal dynamic and static ring plane , its surface a thin scale, can wipe the surface almost no wear and tear , slurry pump manufacturer which is the spring loses its elasticity and assembly caused by poor or axial movement of the motor caused . 

Poor mechanical seal flushing medium containing particles . Because of poor water quality , and the medium containing small particles hydrochloride salt content is high, the formation of abrasive wear of the mechanical seal groove surface plane or strain , ring groove and so on. Required during installation
Improved water pressure or media , increasing filter or replace the mechanical seal . 

Pump running dry run damage caused by dry grinding . This phenomenon is more common in the form of bottom valve mounted at the inlet suction , the inlet air , air pump chamber , the pump is turned on, the mechanical seal friction heat generated when the high-speed operation can not be cooled , check the mechanical seal , the spring tension of the normal the friction surface charred black , rubber hardens cracking. The correct approach is to schedule despite the air channel and pump cavity , replace the mechanical seal . 

Because the medium is water , will produce cavitation , the water temperature is too high to produce steam , vapor inside the pipe into the pump chamber height , this part of the vapor can not be excluded , resulting in dry running mechanical seal dry grinding failure .
Install the pump cover, may not be installed flat , causing the shaft and the pump cover is not perpendicular to cause movement plane can not match, the boot time is not long , resulting in unilateral wear and seepage. May also install the static ring when the rubber is damaged or static ring surface bumps, approach is the installation process checks whether the installed pump cover flat .
Aging of rubber parts , deformation, the main manifestation of the phenomenon of high water temperature , dissolved medium rubber . From the exterior surface of the rubber loose , rough , loss of elasticity , so that the rubber fail , then a suitable material seals need to be replaced .
Stationary ring indoor Holes error, surface rough. Manifestations of the phenomenon of water from the axial , stationary ring and there is a gap between the inner hole or bore rough , stationary ring with switch , rubber wear. Approach is to replace the pump cover . 

Or raw material winding outer stationary ring , or add sealant for emergency treatment .
Sleeve or journal machining accuracy, small size , rough and journal corrosion causes, treatment methods are corroded surface with sandpaper , with raw material winding , into ring for emergency treatment, the best way is for shaft or shaft casement post processing back to the original shaft size .