Liquidyne - 3-Stage (WA) Pump Seal
The Liquidyne 3-Stage (WA) pump seal is used in pumps that process water containing a relatively large number of abrasive particles or particles larger than 100 microns. Lagersmit developed the Liquidyne 3-Stage (WA), especially for pumps in which the pump water is polluted.
- Condition monitoring
- Low power consumption
- Maximised maintenance interval
- Hard Metal Layer (HML) coating for extra durable grooved shaft sleeves
- Settling pipe to optimise flushing medium
- Optional bronze edition to increase lifetime
This seal is mainly applied to dredging pumps, slurry pumps, booster pumps and mining pumps.
The Liquidyne 3-Stage WA seals the pump and uses an external flush to lubricate, cool and clean the seal. This water flow also enables the Condition Monitoring function.
The Liquidyne seal is made up of different modules and fulfills the following functions:
- Sealing the pump shaft
- Reducing pressure
- Retaining dirt
The order of the modules can vary and depends on the specific application. The seal can be roughly divided into two parts:
- A grooved shaft sleeve that is clamped and rotates with the pump shaft;
- The stationary housing parts and rubber lip seals that are mounted against the pump housing.
The Liquidyne 3-Stage WA is designed for large abrasive particles (larger than 100 µm) and uses an external flush to lubricate, clean and cool the seal. 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 3-Stage WA is available for shaft diameters from 35 to 590 millimetres.