High-Performance Butterfly Valve -- Double Eccentric SS316
Technical Datasheet -- Double-Offset Butterfly Valves for Process Control and Isolation
Document No.SV-DATA-HPBV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
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.
Technical Specifications
| 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) |
Materials of Construction
| 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) |
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 | API 609 Category B, MSS SP-68, ASME B16.34 |
Notes
- Seat material must be specified by the purchaser based on service temperature and leakage class requirements.
- For high-temperature service (> 260 deg C), PEEK or metal/Stellite seat is required.
- For cryogenic service (below -50 deg C), extended bonnet, cryogenic packing, and low-temperature materials (ASTM A352 LCC) are required.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
