LIQUIDYNE® LDS

HOW IT WORKS

The Liquidyne LDS is applied on pumps that process polluted and aggressive media. To protect the seal against this media, an external flush is used to lubricate, cool and clean the seal. The flush flows through the seal as well as towards the pump. This ensures that the pump medium is kept away from the seal to create the most durable solution.
 
The Liquidyne seal is made up of different modules and fulfills the following functions:

1. Sealing the pump shaft
2. Reducing pressure
3. Retaining dirt

The order of the modules can vary and depends on the specific application. The seal can be roughly divided into two parts:

1. A grooved shaft sleeve that is clamped and rotates with the pump shaft;
2. The stationary housing parts and rubber lip seals are mounted against the pump housing.
   

The water-lubricated Liquidyne lip seals run over a partially grooved shaft sleeve placed over the pump shaft. The helical shape of the grooves and peripheral speed (RPM) of the liner create water flow (similar to aquaplaning) between the grooves and the lip seal. The water flows from the pump side to the drain of the seal. The condition of the seal is monitored by measuring the water flow from the pump side to the drain of the seal. The Liquidyne LDS is available for shaft diameters from 35 to 510 millimetres.