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Technical Datasheet -- Ductile Iron Gate Valves for Water, Wastewater, and Industrial Service
Ductile iron gate valves for water distribution, wastewater, and general industrial service. Ductile iron EN-GJS-500-7 (GGG50) body provides the strength of steel (500 MPa tensile) with the castability and cost advantage of iron. Metal-seated (bronze or SS316 seat ring) for industrial and steam service, or resilient seated (EPDM or NBR rubber seat) for bubble-tight water and wastewater shutoff. OS&Y rising stem for above-ground visual indication, or NRS non-rising stem for buried service. Epoxy-coated internal and external surfaces per AWWA C550 / EN 14901. Flanged or socket ends. EN 1171 / BS 5163 / AWWA C500 / ASME B16.34 compliant.
| Parameter | Specification |
|---|---|
| Product Type | Ductile Iron Gate Valves |
| Category | Gate Valves |
| Size Range | 2" to 48" (DN50 to DN1200) |
| Pressure Rating | PN10 / PN16 / Class 125 / Class 150 |
| End Connections | Flanged RF per EN 1092-1 PN10/PN16 / ASME B16.5 Class 125/150 / AWWA C207, Socket end (push-on or mechanical joint per AWWA C111/A21.11, on request) |
| Body Material | Ductile Iron EN-GJS-500-7 (GGG50) epoxy-coated (standard) / EN-GJS-400-15 (GGG40, economical) / EN-GJS-600-3 (GGG60, high strength, on request) |
| Wedge Material | Ductile Iron EN-GJS-500-7 epoxy-coated (standard) / Bronze (LG2, on request for seawater) / SS304 / SS316 (corrosive service, on request) |
| Seat Material | Bronze (LG2, standard metal seat) / SS304 / SS316 (corrosive service) / EPDM / NBR rubber seat ring (resilient seated option) |
| Stem Material | SS410 / SS304 / SS316 (corrosion resistant) -- OS&Y rising stem or NRS non-rising stem |
| Bonnet Type | Bolted bonnet with EPDM / NBR gasket (OS&Y) / Screwed bonnet with PTFE joint (NRS, small sizes) |
| Face-to-Face | EN 558 / ISO 5752 Series 14 (short pattern) or Series 15 (long pattern) / ASME B16.10 |
| Operation | Handwheel (up to 12 inch) / Bevel gear (14 inch and above) / Square nut for key (buried service) / Pneumatic / Electric actuator |
| Leakage Class | EN 12266-1 / API 598 -- metal seated: standard leakage acceptable; resilient seated: Class A, zero visible leakage |
| Temperature Range | -10 deg C to +80 deg C (EPDM, water) -- up to +120 deg C (NBR, oil on request) -- up to +200 deg C (graphite packing, steam on request) |
| Component | Material |
|---|---|
| Ductile Iron | EN-GJS-500-7 (GGG50) epoxy-coated body and wedge (standard water/wastewater) |
| Bronze | Gunmetal LG2 seat and wedge (marine / seawater / potable water on request) |
| Stainless Steel | SS304 / SS316 seat, wedge, and stem (corrosive / chemical / food-grade service on request) |
| Rubber Seat | EPDM (water, wastewater, potable) / NBR (oil, hydrocarbon on request) resilient seat ring |
| 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 |
| Standard | Description |
|---|---|
| Design Standard | EN 1171 Industrial Valves -- Cast Iron Gate Valves (reference for DI), BS 5163, AWWA C500, ASME B16.34 |