4th Floor, Survey No. 235/A and 247/A, E/401, Nr. Bhattha School, Gyaspur, Ahmedabad 382405, Gujarat, India
Branch Office: Mehta House, Relief Road, Ahmedabad 380001
Tel: +91 97732 78770 | Email: info@supremevalves.in | www.supremevalves.in
Technical Datasheet -- Double-Offset Butterfly Valves for Process Control and Isolation
Double eccentric (high-performance) butterfly valves for process control and isolation service. The double-offset geometry lifts the disc clear of the seat immediately upon opening, eliminating seat rubbing and extending seat life. Bi-directional tight shutoff with metal or soft seat options. API 609 Category B / MSS SP-68 compliant.
| Parameter | Specification |
|---|---|
| Product Type | High-Performance Butterfly Valves |
| Category | Butterfly Valves |
| Size Range | 3" to 48" (DN80 to DN1200) |
| Pressure Class | Class 150 / Class 300 / Class 600 per ASME B16.5 / API 609 |
| End Connections | Wafer or Lug type per API 609 / MSS SP-68 |
| Body Material | ASTM A216 WCB / ASTM A351 CF8M (SS316) / ASTM A352 LCC (low temp) |
| Disc Material | SS316 with ENP or chrome plating / NAB-coated (marine) |
| Shaft Material | ASTM A276 316 SS / SS410 with Stellite bushing |
| Seat Material | PTFE / RPTFE / PEEK / SS316 + graphite (fire-safe) / Stellite (metal seat) |
| Face-to-Face | API 609 short pattern or ASME B16.10 long pattern |
| Eccentricity | Double offset: shaft offset from disc centre (1st) and pipe centreline (2nd) |
| Operation | Lever with locking device (up to 6 inch) / Gear operator (8 inch and above) / Pneumatic / Electric / Hydraulic actuator |
| Leakage Class | API 598 / EN 12266-1 Class A (soft seat) -- zero visible leakage; Class B/C (metal seat) per ANSI/FCI 70-2 |
| Temperature Range | -50 deg C to +200 deg C (PTFE) -- up to +260 deg C (PEEK) -- up to +600 deg C (metal/Stellite seat) |
| Component | Material |
|---|---|
| Carbon Steel | ASTM A216 WCB, A105 (standard industrial) |
| Stainless Steel | ASTM A351 CF8M (SS316), CF3M (SS316L) |
| Low Temperature | ASTM A352 LCC (down to -46 deg C) |
| Seat Options | PTFE, RPTFE, PEEK, SS316 + graphite (fire-safe), Stellite (metal seat) |
| 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 | API 609 Category B, MSS SP-68, ASME B16.34 |
The High-Performance Butterfly Valve -- Double Eccentric SS316 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.