Solutions for seal pressurization systems
LEWA supplies individual dosing pumps for OEM integration as well as complete, ready-to-use solutions fit for your application. All combinations of the LEWA modules offer a completely automatic, clean, reliable and flexible backfeed solution.
Scope of services and system integration
The scope of services ranges from the supply of single pumps up to system assemblies through engineering and the startup of complex metering and mixing systems.
This includes:
- Customer specific control systems
- Process visualization
- Recording of operating data
- Interfaces to the process control system.
The entire scope — including process control — comes from a single source, ensuring maximum safety and optimal functionality of the overall system.
Areas of application for seal pressurization systems
These systems circulate barrier fluids where mechanical seals need extra protection against process fluids, contamination or extreme conditions like:
- Aggressive or corrosive media in the chemical industry
- High-pressure applications with abrasive fluids in the oil & gas, mining or pulp & paper industries
- High temperature in boiler feedwater systems (e.g. power generation)
- Maintain cleanliness and prevent contamination in the pharmaceutical & food industry
- Protection from scaling and salt intrusion in reverse osmosis systems
Background information for seal pressurization systems
Such pressurization systems are used to circulate barrier fluids that protect mechanical seals and gaskets in demanding pump applications. These systems maintain pressure higher than the process pressure, ensuring that the barrier fluid forms a protective layer and prevents contamination or leakage.
To keep this pressure stable, a dedicated backfeed unit is required. It continuously monitors the system and compensates for any fluid losses caused by leakage or evaporation. By automatically topping up barrier fluid from the supply tank, the refill unit ensures reliable operation and extends the lifetime of seals and equipment.
