The C509 standard applies to traditional gray cast iron gate valves with resilient seats, emphasizing sealing and corrosion resistance. The C515 standard, on the other hand, is a modern standard specifically designed for ductile iron with reduced wall thickness. Through finite element analysis, it optimizes structural strength, resulting in higher pressure resistance, lighter weight, and superior durability, representing the upgrade direction for valves in water systems.
C509 gate valves: Use gray cast iron as the main structural material. They have lower strength and higher brittleness, suitable for conventional pressure conditions, but have limited impact and seismic resistance, making them unsuitable for buried or high-stress environments.
C515 gate valves: Explicitly require the use of ductile iron, whose tensile strength is more than three times that of gray cast iron. They possess good ductility and toughness, better adapting to the dynamic loads and seismic disturbances of underground pipe networks.
Confused About AWWA Standards? Get a Free Technical Consultation on C509 vs. C515 Valve Selection.
Comparison Table: AWWA C509 vs. AWWA C515
| Comparison Dimension | AWWA C509 | AWWA C515 |
| Full Title | Resilient-Seated Gate Valves for Water Supply Service | Reduced-Wall, Resilient-Seated Gate Valves for Water Supply Service |
| Core Definition | The traditional thick-wall design standard. | The modern thin-wall (high-strength) design standard. |
| Body Material | Originally Gray Iron; modern ones are mostly Ductile Iron. | Must be Ductile Iron to utilize high strength for reduced wall thickness. |
| Wall Thickness | Thicker. Emphasizes material redundancy and corrosion allowance. | Thinner. Relies on the high tensile strength of Ductile Iron for pressure safety. |
| Weight | Heavier. Higher costs for logistics, handling, and installation. | Lighter. Typically 20% to 40% lighter than C509 for the same size. |
| Working Pressure | Commonly 200 psi or 250 psi (for 3"-12"). | Commonly 250 psi; some rated up to 350 psi. |
| Size Range | 3" to 72" (3"-12" are the most common). | 3" to 72". |
| Flow Design | Full Port (Straight-through, smooth bore). | Full Port (Straight-through, smooth bore). |
| Strength Requirements | Standard material requirements. | Extremely strict requirements for tensile strength and elongation. |
| Durability Expectation | Extremely high. Extra wall thickness provides a longer corrosion life. | High. Relies on DI performance and high-performance Fusion Bonded Epoxy (FBE). |
| Typical Applications | Retrofitting old networks; projects with extreme wall thickness specs. | Preferred for modern municipal projects and fire protection systems. |
GNEE Valve in stock
Sourcing Municipal Gate Valves? C509 and C515 Models In-Stock and Ready for Immediate Shipment.
FAQ
What is Awwa C515?
The AWWA C515 Grooved Resilient NRS Gate Valve 300PSI (JKDZ85GRPF) is a high-performance valve designed for use in fire protection and water distribution systems.
What is the pressure rating for AWWA c515?
The rated working pressure of the valve shall be 250 psi.
What is awwa C509?
AWWA C509 standard was developed in 1980 to formalize the design standard for resilient seat valves for water and waste water.