GRAPHALLOY®
Bearings for Water Treatment and Wastewater Applications
Summary
Self-lubricating GRAPHALLOY® bearings and bushings are ideally suited for submerged applications such as water treatment and wastewater, where submerged and caustic environments cause problems for other bearing types. For one manufacturer, "the ability of GRAPHALLOY Bearings to provide trouble-free underwater operation without any lubrication" had been a key factor in the success of their products.They are available in standard sizes or custom sizes and are available installed in stainless steel flange blocks and pillow blocks to match your submerged application needs.
In addition to being self-lubricating, Graphalloy bushings are also non-galling and dimensionally stable, making them a good match for wear parts for pumps as well.
GRAPHALLOY provides unique advantages because it combines the properties of graphite and metal. The graphite structure can be compared to a deck of cards with individual layers that are able to easily slide off the deck. This phenomenon gives the material a self-lubricating ability that is matched by no other material. External lubricants such as grease or oil are simply not necessary. It will operate submeged and will not swell or lose it's lubrication. Graphalloy can be provided as direct replacements for industry standard pillow or flange block assemblies, or as custom bushing sizes to fit your equipment.
Why Graphalloy for Water Treatment Applications
- Self-Lubricating: Require no grease or oil, maintenance-free
- Temperature Range: Operate from -450°F to +1000°F (-265°C to +535°C)
- Dimensionally Stable
- Submerged: Operate in submerged conditions and hostile liquids. Will not swell. No lubricant to wash out.
- Corrosion Resistant: Graphalloy Bushings resist attack by most corrosive liquids
Water Treatment Applications for Graphalloy
- Rotary Screens
- Mixers
- Pumps
- Water Treatment Flocculators
- Wastewater Treatment Aerators
- DAF (dissolved air flotaion) Wastewater Sytem
- Wastewater Filtration Systems
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Successful Graphalloy Applications for Water Treatment & Wastewater
Water Treatment Flocculators (Potable Water Process)
Paddle wheels stir the incoming river water to keep the solids suspended until the water is sent to the clarifier. The paddles are mounted on long horizontal shafts through pillow block bearing assemblies. Bearings are fully submerged. Standard Pillow Block Bearings (cast iron pillow blocks with roller bearings) are replaced with self-lubricating GRAPHALLOY.
Primary Clarifiers/Final Clarifiers/Clarifier Agitators
Clarifiers are settling tanks built with mechanical means for continuous removal of solids being deposited by sedimentation. GRAPHALLOY is used in bottom bearing and various pillow-block assemblies.
Waste Treatment Aerator
Condominium’s Wastewater Treatment Plant Waste Treatment Aerator: Babbitt-grade GRAPHALLOY bushings installed in custom housings. GRAPHALLOY lasted over 20+ years before replacement.
March 11, 2025