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OEM AWWA C504 Double Eccentric Butterfly Valve Factories, Exporter
Product Description
AWWA C504 Double Eccentric resilient seated Butterfly Valve is the mainstream product type preferred in water networks, Through its disc design where the center is shifted in two axis, this leads to a big improvement on decreasing operation torque values, Lowering the friction on disc sealing area and extended service life.
Reduced Torque
Double offset design drastically cuts dynamic operation torque.
Low Seat Friction
Minimal disc-to-seal engagement minimizes wear and tear.
Extended Service Life
Heavy-duty construction ensures dependable long-term water network service.
Product Showcase & Details
Technical Specifications
| Size & Pressure Rating & Standard | |
|---|---|
| Size | DN40-DN1800 |
| Pressure Rating | Class125B, Class150B, Class250B |
| Face to Face STD | AWWA C504 |
| Connection STD | ANSI/AWWA A21.11/C111 Flanged ANSI Class 125 |
| Upper Flange STD | ISO 5211 |
| Material Specifications | |
| Body | Ductile Iron, Carbon Steel, Stainless Steel |
| Disc | Ductile Iron, Carbon Steel, Stainless Steel |
| Stem / Shaft | SS416, SS431, SS |
| Seat | Stainless steel with welding |
| Bushing | PTFE, Bronze |
| O-Ring | NBR, EPDM |
| Actuator | Hand Lever, Gear Box, Electric Actuator, Pneumatic Actuator |
Dimensions & Engineering Diagrams
Frequently Asked Questions
What makes the double eccentric (double offset) design superior for water distribution?
The double eccentric geometry offsets both the shaft from the valve body centerline and the disc sealing surface. This allows the disc to detach from the seal almost instantly upon opening, significantly reducing seal friction, lowering dynamic torque, and substantially extending operating life.
What size range and pressure classes are supported under AWWA C504?
This valve series is available in nominal diameters from DN40 up to DN1800. Available pressure ratings fully comply with AWWA standard classifications including Class 125B, Class 150B, and Class 250B.
Which actuation methods can be installed on these butterfly valves?
Thanks to the integrated ISO 5211 upper mounting flange, the valves can be paired with various actuation setups including manual hand levers, enclosed worm gearboxes, electric multi-turn/quarter-turn actuators, or pneumatic actuation systems.
What are the body and seat construction materials?
Valve bodies and discs are available in Ductile Iron, Carbon Steel, or Stainless Steel. The seat is engineered with welded stainless steel for enhanced corrosion resistance and long cycle durability, coupled with resilient NBR or EPDM O-ring sealing elements.
What flange standards are compatible with this valve?
The valve follows the ANSI/AWWA A21.11/C111 Flanged ANSI Class 125 connection standards, ensuring full interchangeability with municipal and industrial pipelines designed to AWWA parameters.
