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Metallic Bellows Stem Seal Isolation and Throttling Valve for Fugitive Emission Control
This datasheet covers bellows seal globe valves with multi-ply SS316L metallic bellows for zero fugitive emissions in toxic chemical, flammable solvent, chlorine, and ammonia refrigeration service.
| Parameter | Specification |
|---|---|
| Valve Size Range | DN15 to DN200 (1/2" to 8") |
| Pressure Rating | PN40 / Class 300 / Class 600 |
| Body Material | CF8M (SS316) cast stainless steel, solution annealed |
| Bellows Material | SS316L multi-ply hydroformed metallic bellows, 10,000+ cycle life |
| Plug Material | SS316 + Stellite 6 hard facing, characterised plug optional |
| Seat Material | Integral SS316 + Stellite 6 overlay; PCTFE soft seat optional |
| Stem Material | SS316, welded to bellows at top, guided by bearings |
| Backup Packing | Graphite braided rings below bellows as secondary seal |
| Gaskets | Spiral-wound SS316 + graphite for body/bonnet joint |
| Temperature Range | -196°C to +425°C (SS316 with graphite packing) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1, butt weld, socket weld |
| Leakage Class | ANSI/FCI 70-2 Class IV (metal), Class VI (soft seat) |
| Features | Zero emission bellows, secondary packing, long cycle life, live-loading option |
| Component | Material |
|---|---|
| Body | CF8M (SS316) cast stainless steel, solution annealed, machined seat bore and flange faces |
| Bonnet | CF8M (SS316) extended bonnet with bellows compression flange and packing backup chamber |
| Bellows | SS316L multi-ply hydroformed bellows, 0.15 mm plies, fatigue-tested to 50,000 cycles |
| Plug | SS316 with Stellite 6 hard facing; characterised cage-guided plug for throttling service |
| Seat | Replaceable screwed SS316 seat ring; PCTFE insert for Class VI shutoff on request |
| Stem | SS316, ground and lapped, guided by upper and lower bearings, welded to bellows at top |
| Backup Packing | Graphite braided rings with anti-extrusion end rings in secondary gland below bellows |
| Test | Requirement |
|---|---|
| Test Standard | API 598 / ISO 5208 / TA-Luft fugitive emission test |
| Certification | CE, PED, ISO 9001, TA-Luft, ISO 15848-1 Class BH |
| Standard | Description |
|---|---|
| Design Standard | ASME B16.34 / BS 1873 / ISO 15848-1 |
The Bellows Seal Globe Valve -- Zero Emission 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.