Why Do We Use Mechanical Seals?

· No “visible” leak - seals do leak vapour as the fluid film on the faces reaches the atmospheric side of the seal faces.

o This would approximate to 1/2 teaspoon a day at normal operating pressures and temperatures, if it were captured and condensed.

· Modern cartridge seal designs do not damage the pump shaft or sleeve. 

· Day to day maintenance is reduced as seals have inboard springs which make them self-adjusting as the faces wear. 

· Seals have lightly loaded faces which consume less power than gland packing. 

· Bearing contamination is reduced in normal operation as the lubricant does not become affected by seal leakage and wash out.

· Plant equipment also suffers less from corrosion if the product is contained in the pump.

· Vacuum can also be sealed with this technology, a problem for packing as air was drawn into the pump.

· Less wasted product will save money, even water is an expensive commodity and less clean up of the area will be needed.