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Technical Datasheet -- Double-Flanged Rubber-Lined Butterfly Valves for Large-Diameter Water Service
Double-flanged butterfly valves for large-diameter water transmission, distribution, and treatment pipelines. Flanged body on both ends for direct bolting to mating flanges in pump stations, reservoirs, and treatment plant headers. Concentric rubber-lined design with full-face liner extending across both flange faces for gasket-free bubble-tight sealing. Ductile iron EN-GJS-500-7 (GGG50) epoxy-coated body. EPDM, NBR, or Viton liner options. AWWA C504 / API 609 / BS EN 593 compliant. Bevel gear, electric, or pneumatic actuator operated.
| Parameter | Specification |
|---|---|
| Product Type | Double Flanged Butterfly Valves |
| Category | Butterfly Valves |
| Size Range | 24" to 96" (DN600 to DN2400) -- other sizes on request |
| Pressure Class | PN10 / PN16 / Class 150 / Class 125 (AWWA C504 Class 150B / 250B) |
| End Connections | Double flanged per EN 1092-1 PN10/PN16 / ASME B16.5 Class 150/125 / AWWA C207 Class B, D, E -- drilled for through-bolting to mating flanges |
| 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) / ASTM A216 WCB (high pressure on request) |
| Disc Material | Ductile Iron EN-GJS-500-7 with EPDM/NBR rubber coating / SS316 with ENP or chrome plating (corrosive service) / Aluminium bronze ASTM B148 C95800 (marine) |
| Shaft Material | SS410 / SS316 / SS304 with bronze bushing or self-lubricating PTFE-lined bushing |
| Seat / Liner Material | EPDM / NBR / Viton (FPM) bonded or replaceable liner -- full-face liner extends across both flange faces for gasket sealing |
| Face-to-Face | AWWA C504 / BS EN 558 Series 13 or 14 (long pattern for large diameter water valves) |
| Operation | Bevel gear operator (standard for all sizes) / Worm gear / Pneumatic / Electric / Hydraulic actuator (for remote pump station and reservoir control) |
| Leakage Class | AWWA C504 -- zero visible leakage at rated pressure (resilient seat bubble-tight); API 598 / EN 12266-1 Class A |
| Temperature Range | -10 deg C to +80 deg C (EPDM, standard water) -- up to +120 deg C (NBR, on request) |
| Component | Material |
|---|---|
| Ductile Iron | EN-GJS-500-7 (GGG50) epoxy-coated body and disc (standard water transmission) |
| Cast Iron | EN-GJL-250 (GG25) epoxy-coated body (economical, non-shock service on request) |
| Stainless Steel | ASTM A351 CF8M (SS316) disc with ENP (corrosive / seawater / food-grade service) |
| Nickel-Aluminium-Bronze | ASTM B148 C95800 (NAB) disc (marine / seawater service) |
| Liner Options | EPDM (water / wastewater), NBR (oil / hydrocarbon on request), Viton FPM (chemical / high temp on request) |
| 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 | AWWA C504 Rubber-Seated Butterfly Valves, API 609 Category A, BS EN 593, MSS SP-67 |
The Double Flanged Butterfly Valve -- Water Transmission EPDM is designed, manufactured, and tested in accordance with applicable API / ASME / BS / ISO international standards. Compliance documentation and Material Test Certificates (EN 10204 3.1) are provided with every order.
Standard construction is carbon steel, stainless steel (CF8 / CF8M), and special alloy grades. Alternative and upgraded grades -- Duplex, Super Duplex, Inconel, Monel, Hastelloy, and NACE MR0175 trims for sour service -- are available on request.
It is offered in a range of sizes as per the technical specification with standard ANSI / ASME pressure classes (PN ratings on request). End connections include flanged (RF / RTJ), butt-weld, socket-weld, and screwed ends as per specification.
Yes. Supreme Valves India is an established exporter of industrial valves to Saudi Arabia (KSA), the UAE, Qatar, Kuwait, Oman, Bahrain, and across the Gulf. We provide sea-worthy export packing, EN 10204 3.1 / 3.2 certification, certificate of origin, and support for SABER / SASO conformity on KSA shipments.
Every valve undergoes hydrostatic shell and seat testing per API 598 / ISO 5208. Documentation includes EN 10204 3.1 MTC (3.2 on request), NDT reports, and fire-safe (API 607) or NACE MR0175 certification where applicable. Third-party inspection by TÜV, SGS, Bureau Veritas, or Lloyd's Register can be arranged.
Order quantities are flexible -- from single units for stocked items to bulk volumes for project requirements. Lead time depends on size, material, and quantity; please contact our team with your specification for a firm delivery schedule and quotation.