Product Name: AWWA C509/C515 Resilient Seated Gate Valve
Size Range: 2″ – 24″
Pressure Rating: 200 psi / 300 psi
Working Temperature: -10˚C ~ +80˚C ,14˚F ~ +176˚F (EPDM Seat)
End Connection: ANSI B16.1 / ANSI B16.5 / AWWA C111 (MJ) / Groove End
Face to face dimensions: AWWA C509 / C515
Test & Inspection: AWWA C509 / C515
Body Materials: Ductile Iron
Wedge Materials: Ductile Iron + EPDM
Seat Materials: EPDM
1.Introduction:
Released by American Water Works Association, AWWA C509 is the standard for resilient-seated gate valves for water supply service. The terminology “resilient-seated” is sometimes also expressed as “resilient wedge”. It indicates that the wedge of the gate valve, which has a plain one-piece hollow construction, shall be encapsulated/ coated with a layer of rubbers of plastics. In other words, resilient seats shall be bonded or mechanically attached to the gate wedge. When the gate valve is turned off, the rubber or plastic encapsulated wedge travels down to the bottom of the flow passage of the valve body. An effective seal is achieved between the seating surfaces of the wedge and the body.
Compared to metal seated gate valves, it doesn’t require a bottom debris-trapping “pocket” on the body, thus, the water can flow through without any obstruction when the valve is fully open. The body and bonnet of AWWA C509 resilient seated gate valves shall be made of gray iron or ductile iron. In engineering practice, ductile iron is preferred due to its superior strength and toughness.
2.Technical Drawing:
3.Features:
* Resilient Seated Gate Valves fully meet or exceed AWWA C509 and C515.
*High strength ductile iron body used for lowering the weight and improving long term durability.
*All iron parts are coated inside & outside with fusion bonded epoxy for corrosion resistance per AWWA C550.
*Stem seal design provides effective sealing against dirt and other impurities.
*The ductile iron wedge is fully encapsulated in vulcanized EPDM / NBR rubber leaving no exposed metal surface. Central guides help reduce friction between wedge and body during open/close operations.
*All iron parts are coated inside & outside with fusion bonded epoxy for corrosion resistance per AWWA C550.
*Stem seal design provides effective sealing against dirt and other impurities.
*Upper O-Rings are replaceable with a valve fully open under operating pressure.
*The waterway is smooth, well rounded, and provides superior flow characteristics and venturi effect.
