Bellows Sealed Globe Valve
Zero-leakage globe valve with stainless steel bellows stem seal for toxic, flammable, or emission-controlled services.
Technical Specifications
| Type | Bellows Sealed |
| Size Range | 1/2" to 8" (15 mm to 200 mm) |
| Body Materials | Carbon Steel (WCB), Stainless Steel 316, Alloy Steel (WC6, WC9) |
| Disc & Seat | Stellite hard-faced, SS316 |
| Bellows | Stainless Steel 316L (multi-ply, 50,000+ cycle) |
| End Connections | Flanged, Butt Weld |
| Pressure Rating | Class 150 / 300 / 600 |
| Standards | BS 1873,ISO 15848-1,TA-Luft VDI 2440 |
| Lead Time | Ex-stock Gujarat: Same day | Standard items: 2–4 weeks | Exotic alloys: 8–12 weeks |
Applications
Toxic / carcinogenic fluids, H2S, HCl, ammonia, steam
About the Bellows Sealed Globe Valve
The bellows sealed globe valve replaces the conventional gland packing as the primary stem seal with a metallic SS316L bellows element. The bellows is welded to the stem at its lower end and to the bonnet at its upper end, creating a hermetically sealed barrier around the moving stem. Because the bellows flexes (rather than sliding against a packing ring) with every valve stroke, there is no dynamic sealing surface to wear - and therefore no progressive increase in stem leakage over the valve's service life that is characteristic of packed-gland designs. A secondary packing gland above the bellows serves as a redundant safety backup; a telltaleindicator port between bellows and gland alerts maintenance to bellows failure before the secondary seal is called into service.
Bellows sealed globe valves are the go-to design for fugitive emission compliance in chemical and petrochemical plants: they achieve ISO 15848-1 Class A performance (stem leakage <10 ppm methane equivalent), satisfying TA-Luft VDI 2440, EPA Leak Detection and Repair (LDAR) Method 21, and OSHA PSM requirements. The globe valve's inherent throttling capability combined with zero emission makes bellows sealed globe valves valuable in flow-controlled chemical lines handling carcinogenic or environmentally regulated substances. Vajra Industrial Solutions supplies bellows sealed globe valves with multi-ply 316L bellows rated for 50,000+ operating cycles in sizes 1/2" to 8".
Where It's Used
Key industries and applications for the Bellows Sealed Globe Valve
Chemical plants
benzene, vinyl chloride monomer (VCM), ethylene oxide, and acrylonitrile flow control and isolation lines where TA-Luft or EPA Method 21 compliance is mandatory; Hastelloy or Alloy 20 body for corrosive chemicals
Ammonia and refrigeration plants
SS316 or WCB bellows sealed globe valves on NH3 liquid and gas lines; eliminating stem emissions that trigger OSHA PEL exceedances and require costly environmental reporting
Hydrogen service
Class 600 WC9 bellows sealed globe valves on H2-rich reformate, syngas, and high-pressure hydrogen lines; bellows provides metal barrier impervious to hydrogen permeation that degrades PTFE packing
Pharmaceutical active ingredient (API) manufacturing
SS316L bellows sealed globe valves on solvent, acid, and toxic intermediate lines in GMP-controlled areas; low-extractable materials and documentation package for drug manufacturing audits
Nuclear auxiliary systems
SS316 bellows sealed globe valves on radioactive coolant auxiliary systems, charging lines, and letdown systems in nuclear power plants; NRC/ASME Section III traceability documentation provided
How to Choose the Right Bellows Sealed Globe Valve
Bellows sealed globe valves are required when: (a) stem fugitive emissions must meet ISO 15848-1 Class A, TA-Luft, or EPA LDAR requirements for toxic or carcinogenic fluids; (b) the fluid is hydrogen or a hydrogen-rich gas that permeates PTFE packing; (c) the valve will see frequent stroking (throttling service) that would rapidly wear a conventional packing ring. Specify multi-ply SS316L bellows for maximum cycle life; ask for the bellows pressure and cycle test certificate. For infrequent on/off service with non-toxic fluids, live-loaded packing is a lower-cost alternative.
Popular Configurations
Most commonly ordered specifications for the Bellows Sealed Globe Valve
Frequently Asked Questions
About Bellows Sealed Globe Valve - ordering, specs, delivery & compliance
What standards does the Bellows Sealed Globe Valve comply with?+
Our Bellows Sealed Globe Valve complies with BS 1873, ISO 15848-1, TA-Luft VDI 2440. All products are manufactured to international standards and come with full material test reports (MTR), dimensional inspection reports, and hydrostatic test certificates on request.
What materials are available for the Bellows Sealed Globe Valve?+
The Bellows Sealed Globe Valve is available in Carbon Steel (WCB), Stainless Steel 316, Alloy Steel (WC6, WC9). Material selection depends on your process fluid, temperature, pressure, and corrosion requirements.
What is the delivery lead time for Bellows Sealed Globe Valve?+
Standard stock sizes are available for immediate dispatch from our Vadodara warehouse. Custom sizes and special materials typically have a lead time of 2–6 weeks depending on specifications. We serve customers across India within 1–7 business days and export to the Middle East, Southeast Asia, Europe, and the Americas with full export documentation.
Can I get a custom Bellows Sealed Globe Valve for a specific application?+
Yes. Vajra Industrial Solutions supplies custom-engineered globe valves for specific process conditions. Submit your technical requirements - including pressure class, temperature range, fluid type, end connections, and any special trim or coating needs - via our RFQ form or WhatsApp, and our engineering team will respond within 24 hours.
What pressure ratings are available for the Bellows Sealed Globe Valve?+
The Bellows Sealed Globe Valve is available in pressure ratings of Class 150 / 300 / 600. Higher-pressure classes are available for critical service applications in oil & gas, power generation, and chemical processing.
How do I request a quote for the Bellows Sealed Globe Valve?+
You can request a quote by clicking the "Request Quote" button on this page, filling out our RFQ form at vajravyuh.com/rfq, emailing us at sales@vajravyuh.com, or WhatsApping us directly at +91-9979774557. Please include quantity, size, pressure class, material grade, and end-connection type for the fastest response.
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