AWWA C509 Resilient Seated Gate Valves

Technical Drawing

Design Characteristics & Material Selection

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 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 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.

Valve Part	Material
Body	ASTM A536 Gr. 65-45-12
Bonnet	ASTM A536 Gr. 65-45-12
Wedge	ASTM A536 Gr. 65-45-12/ ASTM D2000 EPDM
Stem	Stainless Steel 304 AISI 420 ASTM B16 C36000
Wrench Nut	ASTM A536 Gr. 65-45-12
Handwheel	ASTM A536 Gr. 65-45-12
Packing	ASTM D2000 EPDM
O-Rings	ASTM D2000 EPDM
Gaskets	ASTM D2000 EPDM

*The non-rising stem gate valve shall be furnished with wrench nut; The OS&Y rising-stem gate valve shall be furnished with handwheel.
*Working pressure: 200 psi; working temperature: -4°F to 230°F.
*Flange dimensions to ASME B16.1 Class 125; shell test pressure: 300 psi; seal test pressure: 220 psi.

Dimensions

NPS	L	H
2"	7.0	10.8
2-1/2"	7.5	11.7
3"	8.0	12.7
4"	9.0	14.1
5"	10.0	16.3
6"	10.5	17.6
8"	11.5	21.0
10"	13.0	24.3
12"	14.0	27.8

*AWWA C509 non-rising stem gate valves Shijiazhuang Metalsin supplies, resilient seated, 2″~12″, RF flanges, with wrench nut; all dimensions are in inch.

Size	L	H	D
2"	178	362	180
2-1/2"	190	402	180
3"	203	483	200
4"	229	534	200
5"	254	661	250
6"	267	727	250
8"	292	830	320
10"	330	1112	370
12"	356	1291	370

*AWWA C509 OS&Y rising stem gate valves Shijiazhuang Metalsin supplies, resilient seated, 2″~12″, RF flanges, handwheel operated; all dimensions are in mm.