Power Generation

Condensate Polishing Septa & Specialty

Electric generating station condensate must be maintained at a very high purity level to protect boilers, steam generators, reactors, and turbines from corrosion. To remove contaminants from the condensate, deep bed ion exchange condensate polishers are used and sometimes preceded by a Powdex® filter demineralizer or a fine particulate filtration system. A Powdex system can also stand alone as the primary polisher.

Graver Technologies is the most experienced and knowledgeable Ion Exchange product and Filter Septum manufacturer and offers the most complete range of products to meet today’s challenges. Whether the need is for high purity Gravex® condensate polishing ion exchange resins; the original Aegis® wound, DualGuard® or AFA® pleated filter septa; or the Powdex & Ecodex® families of premium resins, the original and most widely used powdered ion exchange resins, Graver Technologies has the answer for your application.

  • Aegis precoatable filter septa for Powdex filter demineralizers
  • AFA, the first backwashable pleated filters installed in a condensate pre-filter system
  • DualGuard, combination pleated filter with a precoatable and easily backwashable surface

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Internal ID: 24
Aegis® AFA® Pleated Septa

Aegis® AFA® Pleated Septa

Graver’s AFA non-precoatable backwashable condensate polishing septa are engineered to meet the high demands in the utility industry for iron oxide removal and backwashing.

Key features:
  • Absolute micron rating from 1 to 25 µm
  • Removal efficiency rated at 99.9%
  • High surface area of pleated media
  • High dirt holding capacity
  • Backwashable media recipe
  • Fixed pore construction eliminates dirt unloading as differential pressure increases
  • Pleat optimization for extended runs between backwashings
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Internal ID: 23
Aegis® AFA® Pleated Septa

Aegis® AFA® Pleated Septa

Graver’s AFA non-precoatable backwashable condensate polishing septa are engineered to meet the high demands in the utility industry for iron oxide removal and backwashing.

Key features:
  • Absolute micron rating from 1 to 25 µm
  • Removal efficiency rated at 99.9%
  • High surface area of pleated media
  • High dirt holding capacity
  • Backwashable media recipe
  • Fixed pore construction eliminates dirt unloading as differential pressure increases
  • Pleat optimization for extended runs between backwashings
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Internal ID: 26
Aegis® PowerGuard® Septa & Strainers

Aegis® PowerGuard® Septa & Strainers

Aegis® PowerGuard Septa offers low pressure drop, high strength, excellent corrosion resistance, and collapse strengths over 400 PSID.

Key features:
  • Absolute micron rating from 1 to 350µm
  • Removal efficiency rated at 99.9%
  • Lower differential pressure
  • High dirt holding capacity
  • Fixed pore construction eliminates dirt unloading
  • Increased throughput
  • Direct replacements for old OEM installed Hub and Lateral or under drain systems
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Internal ID: 28
Aegis® PowerGuard® Stainless Steel Septa & Underdrains

Aegis® PowerGuard® Stainless Steel Septa & Underdrains

Graver's PowerGuard® with Poroplate® is the solution for problematic wedge wire.

Key features:
  • Absolute micron rating from 1 to 350µm
  • Removal efficiency rated at 99.9%
  • Lower differential pressure
  • High dirt holding capacity
  • Fixed pore construction eliminates dirt unloading
  • Increased throughput
  • Direct replacements for old OEM installed Hub and Lateral or under drain systems
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Internal ID: 30
Aegis® Thermoguard Wound Precoat Septa w/ SS

Aegis® Thermoguard Wound Precoat Septa w/ SS

Aegis® Precision Wound Condensate Polishing Septa with Stainless Steel Hardware is used for steam generators in both nuclear and fossil fuel operations, ensures high-purity water by providing an optimum surface for Gravex Powdex® resin in precoat systems.

Key features:
  • Stainless steel core and end fittings
  • Backwashable
  • High surface area
  • Designed specifically for plants that need to increasecondensate flow while maintaining high puritycondensate and smooth, consistent precoats
  • The first septa designed for use with difficult thinlayer precoating techniques
  • Manufactured in Graver’s ISO certified state of theart facility with PLC controlled winding of 100%polypropylene, prewashed yarn
  • Long run times
  • Built specifically for polishing application
  • Capable of supporting power upgrades by installingincreased diameter
  • Septa to reduce system flux rate with increasedprecoat contact time and longer run length
  • Carbon fiber and acrylic fiber available for hightemperature applications
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Internal ID: 32
Aegis® Tilting Guide Rod

Aegis® Tilting Guide Rod

No PDF for this product

Key features:
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Internal ID: 34
Aegis® TurboGuard® GF Series Filter Cartridges

Aegis® TurboGuard® GF Series Filter Cartridges

Graver Technologies' TurboGuard is a high-flow filter for condensate and high purity water applications, offering CRUD removal and advanced filtration.

Key features:
  • Flow is from the inside core to the outer pleats
  • TurboGuard Filters are wrapped in a one-piece extrudedouter cage preventing both media migration during insideout flow, and tearing during removal
  • TurboGuard’s one-piece extruded outer cage allowsfor easier maintenance and removal
  • One-piece molded end caps, including molded-in bailfor secure handling during installation and removal
  • Quad Seal gasket system to provide maximum sealingsurfaces
  • Thermally bonded construction
  • Low pressure drop at specified flow rates
  • Optimized media surface area allows the full useof installed media area — not blocked off by media“squeezing”
  • A complete line of ASME Code Section VIII Division 1Housings are available
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Internal ID: 36
Aegis® TurboGuard® Pressure Vessels

Aegis® TurboGuard® Pressure Vessels

Vessel selection is based upon first selecting the proper material of construction - either unlined carbon steel or 304 Grade Stainless Steel. The next critical component to select is the maximum operation design pressure - either 250 psig or 400 psig.

Key features:
  • Vessels are sized for 60” TurboGuard filter elements
  • For larger flow rates smaller units can be paralleledor stacked
  • ASME Code Section VIII Division 1
  • Horizontal or vertical mounting
  • Flanged connections
  • Designed for power plant use
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Internal ID: 38
Aegis® TurboGuard® RF Series Pre-Filters

Aegis® TurboGuard® RF Series Pre-Filters

Graver TurboGuard® RF Series filter is another in the series of larger geometry filters to handle higher volume applications with fewer filter elements. The result is much faster, easier filter changeouts.

Key features:
  • 6.5” diameter, large geometry for high flow rates
  • Capable of flow rates up to 80 gpm in the P2 configuration and 500 gpmin the P30 configurationl
  • Multi-layer pleated construction with optimized surface area
  • Thermally bonded construction
  • Absolute retention ratings from 1 to 100 microns
  • Retrofits competitive large diameter filter housings utilizing the “740” designor the large diameter 338 o-ring designs
  • All polypropylene construction provides for a high level of chemicalcompatability
  • TurboGuard’s one-piece extruded outer cage allows for easiermaintenance and remova
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Internal ID: 40
Aegis® Wound Precoat Septa with Stainless Steel Core

Aegis® Wound Precoat Septa with Stainless Steel Core

Graver Technologies' Aegis® Precision Wound Septa for condensate systems have a long service life and are pre-washed to remove contaminants for faster startup.

Key features:
  • Specially designed polypropylene yarn selected for condensate system use
  • All yarn is prewashed to remove contaminants and TOC, resulting in faster rinse up and startup
  • Innovative asymmetric pore design facilitates maximum backwash strength to pass through the septa to the outer surface and provide optimal resin and crud removal
  • Surface preparation of the yarn to optimize precoat resin holding ability
  • Uniform pressure drop maintained along the entire length of the septa guarantees even precoats
  • Designed and “matched” to Graver Technologies Powdex® and Ecodex® resins
  • The only septa manufactured by the same company that manufactures the powdered resins assures good working compatibility between the two components
  • A long history exceeding 6 – 10 years service life
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Internal ID: 67
DualGuard® 2 Pleated Septa

DualGuard® 2 Pleated Septa

Learn about Graver Technologies' DualGuard® Pleated Septa, unique two-phase backwashable filters that facilitate both dissolved ion contaminant and particulate reduction.

Key features:
  • The optimum precoat surface allows for the distribution and sustainabilityof an evenly thin layer precoat for optimum performance
  • High surface area of pleated media
  • Pleated media available in 1 micron to 25 micron pore sizes to meet thespecific filtration requirements
  • Septa can be precoated when needed, or operated in a naked filtrationmode as required by a system’s specific operating requirements
  • Improved backwash ability
  • Low pressure drop
  • Unique high purity gaskets will not cause chemistry excursions
  • Rugged construction made for intended service
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Internal ID: 69
DualGuard® Polishing Septa

DualGuard® Polishing Septa

Graver Aegis® DualGuard® Septa are innovative two-phase backwashable filters that reduce dissolved ion contaminants and particulates.

Key features:
  • The optimum precoat surface allows for the distribution and sustainability of an evenly thin layer precoat for optimum performance
  • High surface area of pleated media
  • Pleated media available in 1 micron to 25 micron pore sizes to meet the specific filtration requirements
  • Septa can be precoated when needed, or operated in a naked filtration mode as required by a system’s specific operating requirements
  • Improved backwash ability
  • Low pressure drop
  • Unique high purity gaskets will not cause chemistry excursions
  • Rugged construction made for intended service
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Internal ID: 315
Sealfast® Tubesheet Adapter

Sealfast® Tubesheet Adapter

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Internal ID: 343
Thermoguard® Precoat

Thermoguard® Precoat

Key features:
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Internal ID: 348
TurboGuard® Pre-Filters

TurboGuard® Pre-Filters

TurboGuard® High Flow Filters will provide superior CRUD removal upstream of deep bed demineralizers.

Key features:
  • Flow is from the inside core to the outer pleats
  • TurboGuard Filters are wrapped in a onepiece extruded outer cage preventing both media migration during inside out flow, and tearing during removal
  • Onepiece molded end caps, including moldedin bail for secure handling during installation and removal
  • Thermally bonded construction and low pressure drop at specified flow rates
  • Maximum Flow Rates (lower flow rates will affect performance)
  • 20” Element up to 175 gpm (663 lpm)
  • 40” Element up to 350 gpm (1,325 lpm)
  • 60” Element up to 500 gpm (1,893 lpm)
  • A complete line of ASME Code Section VIII Division 1 Housings are available
  • Optimized media surface area allows the full use of installed media area — not blocked off by media “squeezing”
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