Resilient Seated Gate Valve -- AWWA C509 Water / Wastewater
Technical Datasheet -- Rubber-Wedge Resilient Seated Gate Valves for Water and Wastewater
Document No.SV-DATA-RSGV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
Resilient seated (rubber wedge) gate valves for water distribution, wastewater, and irrigation service. Rubber-encapsulated ductile iron wedge and replaceable rubber seat ring achieve bubble-tight shutoff even on debris and sediment -- outperforming metal-seated gate valves in raw water and wastewater. Non-rising stem (NRS) for buried service or OS&Y rising stem for above-ground visual indication. Ductile iron EN-GJS-500-7 (GGG50) epoxy-coated body. AWWA C509 / AWWA C515 / BS 5163 / EN 1171 compliant. Handwheel, bevel gear, key-operated square nut, or actuator drive.
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Resilient Seated Gate Valves |
| Category | Gate Valves |
| Size Range | 2" to 48" (DN50 to DN1200) |
| Pressure Rating | PN10 / PN16 / Class 150 (waterworking pressure: 150 psi / 200 psi / 250 psi per AWWA C509) |
| End Connections | Flanged per AWWA C207 (Class B, D, E) / EN 1092-1 PN10/PN16 / ASME B16.5 Class 125 / Class 150, Socket end (push-on or mechanical joint per AWWA C111/A21.11) |
| Body Material | Ductile Iron EN-GJS-500-7 (GGG50) epoxy-coated / Cast Iron EN-GJL-250 (GG25) epoxy-coated (on request for non-shock service) |
| Wedge Material | Ductile Iron EN-GJS-500-7 (GGG50) epoxy-coated with EPDM or NBR rubber encapsulation (vulcanised or bonded) |
| Seat Material | EPDM / NBR / Viton FPM rubber seat ring (replaceable) bonded or retained in body seat recess |
| Stem Material | SS410 / SS304 / SS316 (corrosion resistant) -- rising or non-rising design |
| Bonnet Type | Bolted bonnet with EPDM / NBR gasket -- OS&Y (outside screw and yoke, rising stem) or NRS (non-rising stem) |
| Face-to-Face | AWWA C509 / ASME B16.10 short pattern (NRS) or long pattern (OS&Y) |
| Operation | Handwheel (standard up to 12 inch) / Bevel gear (14 inch and above) / Square nut for key / Pneumatic / Electric actuator |
| Leakage Class | AWWA C509 -- zero visible leakage at rated pressure (resilient seat bubble-tight); EN 12266-1 Class A -- zero visible leakage |
| Temperature Range | -10 deg C to +80 deg C (EPDM, water) -- up to +120 deg C (NBR, oil/hydrocarbon on request) |
Materials of Construction
| Component | Material |
|---|
| Ductile Iron | EN-GJS-500-7 (GGG50) epoxy-coated body and wedge (standard water/wastewater) |
| Cast Iron | EN-GJL-250 (GG25) epoxy-coated body (economical, non-shock water service on request) |
| Stainless Steel | SS410 / SS304 / SS316 stem (corrosion resistant, standard for potable water) |
| Rubber Encapsulation | EPDM (water, wastewater, potable), NBR (oil/hydrocarbon), Viton FPM (chemical, high temp on request) |
Testing & Inspection
| Test | Requirement |
|---|
| Testing | Hydrostatic shell test 1.5 x WP per API 598 / EN 12266-1; Seat leakage test per API 598 / EN 12266-1; Functional test -- full stroke, torque; Material certificates per EN 10204 3.1 |
| Certification | ISO 9001:2015 QMS, EN 10204 3.1 material certificates, hydrostatic and seat test reports |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | AWWA C509 Resilient-Seated Gate Valves for Water Supply Service, AWWA C515 (large diameter), BS 5163, EN 1171 |
Notes
- Pressure rating (PN10 / PN16 / Class 150), end connection type (flanged / socket / mechanical joint), and stem type (NRS / OS&Y) must be specified by the purchaser.
- For potable water service, specify WRAS-approved or NSF-61 certified EPDM rubber encapsulation and coating.
- For abrasive water (sand, silt, mining tailings), specify full rubber encapsulation on both faces of the wedge and replaceable seat ring.
- For buried service, specify NRS with extension stem and surface box to operating depth; for above-ground service, specify OS&Y with yoke and position indicator.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
