

Features & Benefits
Available for nuclear class 1, 2, and 3 and safety related applications.
- Long cycle life bellows (5000 cycles). Gr. 321 (stainless) for Class 1500, Hastelloy for Class 2500. Optional materials available on request. Designed for, and successfully tested in high pressure/temperature conditions.
- No torsion of bellows. Splined stem prevents torsion of bellows and assures long cycle life.
- Low torque due to:
a) non-rotating stem
b) yoke nut thrust bearings
c) central grease fitting for lubrication of stem nut - Two secondary stem seals:
a) Backseat in open position
b) Graphite packing - In-line servicing. Stem-bellows assembly can easily be removed and replaced on valves with threaded bonnet. On seal-welded valves, removal and replacement of weld is necessary. Special tools are available for cutting the seal weld.
- Solid Stellite disc and seat. (Seat vacuum brazed).
Product Details
| Spec | Detail |
|---|---|
| Size Range | ½-2" (15-50 mm) |
| Pressure Class | ASME Classes 1500-2500 |
| Standard Connections | Socket weld, butt weld, flanged, and threaded |
Quality That Lasts
Precision Engineered
Our products, crafted with cutting-edge precision, set the industry standard for quality, reliability, and versatility across an expansive range of applications.
Long-Lasting & Durable
Velan leverages advanced engineering capabilities and innovation to create durable valves that meet critical industrial needs in the areas of nuclear power, mining, oil and gas, and more.
Certified & Tested
Innovation is our DNA. From our first steam trap to advanced cutting-edge valve designs, we are committed to providing solutions that define the highest standards of quality and performance.
Related Documents
Explore related resources and materials, including product catalogues and certificates, maintenance manuals and more.
Explore All Literature
Reach Out
Need support or have a question? The Velan team is here to help.
"*" indicates required fields




