Bellows Seal Globe Valve -- SS316 Zero Emissions
Technical Datasheet -- Multi-Ply Bellows Seal Globe Valves for Fugitive Emission Control
Document No.SV-DATA-BSGV-001
RevisionA
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
Bellows seal globe valves for zero-emissions service. Multi-ply SS316L hydroformed bellows provides an absolute dynamic seal around the stem, eliminating all packing leakage and meeting TA-Luft, ISO 15848-1, and EPA VOC emission requirements. Secondary graphite packing provides fail-safe backup sealing. Available with soft PTFE seat (bubble-tight) or Stellite metal seat (high temperature).
Technical Specifications
| Parameter | Specification |
|---|
| Product Type | Bellows Seal Globe Valves |
| Category | Globe Valves |
| Size Range | 1/2" to 6" (DN15 to DN150) |
| Pressure Class | Class 150 / Class 300 / Class 600 per ASME B16.5 |
| End Connections | RF flanged per ASME B16.5, threaded NPT / BSP, socket weld, butt weld |
| Body Material | ASTM A351 CF8M (SS316) / ASTM A216 WCB (carbon steel with SS316 bellows) |
| Bellows Material | Multi-ply SS316L / SS321 / Inconel 625 bellows (hydroformed or welded plies) |
| Disc Material | SS316 with Stellite 6 overlay or soft seat (PTFE/RPTFE) option |
| Seat Material | SS316 with Stellite 6 overlay (metal seat) or renewable PTFE insert (soft seat) |
| Stem Material | SS316 with anti-blowout design -- stem is fully enclosed by bellows |
| Secondary Packing | Graphite braided packing below bellows as secondary seal in event of bellows failure |
| Leakage Class | TA-Luft / ISO 15848-1 Class BH (bellows) -- zero visible external leakage; Seat: API 598 Class A (soft seat) or standard (metal seat) |
| Temperature Range | -196 deg C to +400 deg C (SS316L bellows) -- up to +600 deg C (Inconel 625 bellows) |
| Bellows Cycle Life | > 10,000 full open/close cycles at rated pressure and temperature |
Materials of Construction
| Component | Material |
|---|
| Stainless Steel | ASTM A351 CF8M (SS316) body, SS316L multi-ply bellows |
| Carbon Steel | ASTM A216 WCB body with SS316L bellows (economical zero-emissions option) |
| High-Temp Bellows | Inconel 625 multi-ply bellows for temperatures above 400 deg C |
| Seat Options | SS316 + Stellite (metal seat) or PTFE/RPTFE insert (soft seat, bubble-tight) |
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 602 Compact Steel Gate/Globe/Check Valves, ASME B16.34, API 598, TA-Luft (German clean air) |
Notes
- Service fluid, temperature, and emission class (TA-Luft / ISO 15848-1) must be specified by the purchaser for correct bellows material and cycle life verification.
- Bellows material: SS316L (up to 400 deg C), Inconel 625 (up to 600 deg C). Bellows cycle life > 10,000 cycles at rated conditions.
- For oxygen service, all components must be degreased and cleaned per ASTM G93 Level 300.
- All valves are manufactured by Supreme Valves India as per our standard specifications.
