AWWA C517 is a design and performance standard for cast iron eccentric plug valves with resilient seats, developed by the American Water Association (AWWA). It is applicable to water, wastewater, and reclaimed water systems ranging from 3 inches to 72 inches and specifies the core requirements for valve materials, pressure ratings, connection methods, and operating conditions.
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Data Sheet
AWWA C517 Specifications
| Parameters | Technical Details | Remarks |
| Size Range | 3" to 72" (DN80 - DN1800) | Larger sizes available upon request. |
| Design Standard | AWWA C517 | Standard for Resilient-Seated Eccentric Plug Valves. |
| Pressure Rating | 150 psi, 175 psi, 250 psi | Depending on size and application requirements. |
| End Connections | Flanged (ASME B16.1), MJ (AWWA C111) | Flanged, Mechanical Joint, or Grooved ends. |
| Face-to-Face | Per AWWA C517 | Compliant with industry-standard dimensions. |
| Hydrostatic Shell Test | 2 x Working Pressure | Ensures structural integrity of the valve body. |
| Resilient Seat Test | 1 x Working Pressure | Guarantees "Bubble-Tight" shut-off. |
| Applicable Media | Wastewater, Slurry, Grit, Raw Water | Ideal for fluids containing solids or fibers. |
AWWA C517 Materials of Construction
| Component | Material Options | Reference Standard |
| Body | Ductile Iron / Cast Iron | ASTM A536 / ASTM A126 Cl. B |
| Plug Core | Ductile Iron | ASTM A536 Core |
| Plug Encapsulation | NBR (Buna-N), EPDM, Neoprene | Selected based on chemical compatibility. |
| Body Seat | Welded 90% Pure Nickel | Overlaid for superior corrosion/abrasion resistance. |
| Bearings | 316 Stainless Steel / Sintered SS | Permanently lubricated, grit-resistant. |
| Shaft Packing | NBR V-Type Packing | Self-adjusting or adjustable under pressure. |
| Shaft | Stainless Steel / Ductile Iron | ASTM A276 Type 304/316 |
| Fasteners | Zinc-Plated Steel / Stainless Steel | ASTM A307 / A193 B8 |
| Interior Coating | Fusion Bonded Epoxy (FBE) | Compliant with AWWA C550. |
Applications of AWWA C517 Plug Valve
The Primary Application: Wastewater
Raw Sewage Isolation
Sludge Handling
Grit Chambers
Scum & Grease Lines
Municipal Water & Raw Water
Raw Water Intakes
Pump Station Discharge
Filter Backwash
Industrial & Mining Slurries
Mining Slurries
Pulp & Paper
FGD Systems
Cooling Water
Stormwater & Flood Control
Stormwater Pumping
Sewer Interceptors
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Reliable Wastewater Isolation – 3" to 72" AWWA C517 Valves Ready for Your Project.
FAQ
What is the difference between eccentric and non eccentric plug valves?
Plug Design: Standard plug valves use a central plug, while eccentric plug valves use an off-center or eccentric plug. Wear Resistance: The eccentric design reduces wear and friction compared to a standard plug valve. Flow Control: Eccentric plug valves provide smoother flow control and better throttling performance.
What is the difference between eccentric plug valve and ball valve?
An eccentric plug valve has a plug-shaped, flow-restricting component that rotates in an eccentric direction, and a ball valve regulates the flow of liquids or gasses by using a ball with a bore.
What does eccentric mean in valves?
Eccentric plug valves are a type of rotary control valve designed with an offset or eccentric plug--the eccentric design means that the plug rotates off-center. The unique design offers several advantages, including improved sealing capabilities and reduced wear and tear on the valve components.