Double Flanged Butterfly Valve -- Water Transmission EPDM
Technical Datasheet -- Double-Flanged Rubber-Lined Butterfly Valves for Large-Diameter Water Service
Document No.SV-DATA-DFBV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
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.
Technical Specifications
| 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) |
Materials of Construction
| 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) |
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 C504 Rubber-Seated Butterfly Valves, API 609 Category A, BS EN 593, MSS SP-67 |
Notes
- Size, pressure class (PN10 / PN16 / Class 150), flange drilling standard (EN 1092-1 / ASME B16.5 / AWWA C207), and liner material must be specified by the purchaser.
- Confirm mating flange standard and drilling pattern to ensure compatibility with the valve flange drilling.
- For potable water service, specify WRAS-approved or NSF-61 certified EPDM liner and epoxy coating.
- For buried or submerged installations (reservoir outlet, culvert), specify extension stem and floor stand to operating depth, and anti-corrosion coating system.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
