Pre RO

Graver Technologies manufactures a range of high performance pleated and melt blown filter technologies for Pre RO applications.

High Performance Filtration Technology for Pre RO

Makeup water is central to the steam cycle, replenishing water to the steam condensate cycle as needed to maintain the water inventory of the cycle. Systems often include an RO (reverse osmosis) unit as the first stage treating raw water, and some makeup systems may include a carbon vessel or ultra-filtration when necessary. Sources will vary and may include well water and surface waters such as rivers and lakes, thus water quality varies as well. The application includes water for BWR (Boiling Water Reactor) and PWR (Pressurized Water Reactor) nuclear plants. Makeup water is typically added to a condensate storage tank and then directly to the water cycling to the Reactor in a BWR plant and to the water cycling to the Steam Generator in a PWR plant. In a fossil fuel power generation facility, the condensate storage tank adds to the water cycling to the boiler. This is also accomplished in cogeneration facilities and industrial plants that have an on-site power generation system.

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About Our Filtration Technology for Pre RO (Reverse Osmosis)

Pre-RO filters to protect the RO membranes from fouling
Trap filters downstream of sand, resin, and carbon beds prior to the RO membrane
Large geometry available to provide high efficiency and high flow in reduced footprint

Product Selection

CMBF™ or MBC™ melt blown depth filters for Pre RO filtration to prevent membrane fouling.
Turboguard™ large geometry filters to meet large volume flow demands for incoming water with a small footprint and simplified change-out

Frequenty Asked Questions

How often should gas turbine filters be replaced?

This depends on the environment and filter type; however, pre-filters are changed every 3–6 months, while final filters may bechanged once in a year or two. Monitoring pressure drop is key to determiningreplacement timing.

What factors affect the operating life of a gas turbine filter?

Here are some factors:

Ambient dustand pollution levels
Operatinghours and load
Pulse-cleaningfrequency, depending on the type
Humidity andmoisture
Filter mediaand design

How do I know when a filter needs to be changed?

Differential pressure across the filter is animportant aspect in this case. If it increases beyond the set threshold, thefilter may be clogged or need cleaning or replacement.

What is pressure drop and why does it matter?

Pressure drop is the resistance to airflow through afilter. A high-pressure drop reduces turbine efficiency and increases energycosts. Selecting low-resistance filters helps improve performance.