Overview
The Nupro SS-6BK is a bellows-sealed shut-off valve manufactured by Swagelok, a leading provider of precision fluid system components. This valve delivers reliable isolation of system fluids with a leak-tight, packless design featuring a welded bellows and gasketed body-to-bellows seal. The Nupro SS-6BK is engineered for critical applications where seal integrity to atmosphere is essential, including gas distribution, semiconductor processing, laboratory systems, and general industrial fluid control.
Key Features
- Bellows-sealed design with no packing for zero fugitive emissions
- Stainless steel 316 construction for corrosion resistance and high-purity applications
- Gasketed body-to-bellows seal with welded bellows for maximum reliability
- PCTFE stem tip for soft-seat shutoff and precise sealing
- Multiple end connection options available (socket weld, butt weld, Swagelok tube fittings)
- Rated up to 1,000 psi working pressure
Technical Specifications
Specifications vary by configuration suffix. Common SS-6BK variants include:
- Body Material: 316 Stainless Steel
- Bellows Material: 321 Stainless Steel, PTFE-coated
- Stem Tip: PCTFE (soft-seat shutoff)
- Gasket: 316 Stainless Steel
- Maximum Working Pressure: 1,000 psi (68.9 bar)
- Port Sizes: 3/8″ and 1/2″ (varies by model variant)
- End Connection Types: Socket Weld, Butt Weld, Swagelok Tube Fitting
- Operating Temperature Range: See datasheet for specific model variant
Typical Applications
- Semiconductor process gas systems
- Ultra-high vacuum (UHV) equipment
- Laboratory and research instrumentation
- Precision pneumatic and hydraulic systems
- High-purity gas distribution networks
- Specialty chemical process isolation
- Cryogenic gas service (configuration dependent)
Compatibility & Replacements
Compatible With
- Swagelok tube fittings and connections (model-dependent)
- Standard 3/8″ and 1/2″ tube or NPT connections
- High-purity gas systems (semiconductor, research, medical)
- Hydraulic and pneumatic manifolds
- Industrial fluid isolation systems
Replaces / Drop-In Replacement For
The Nupro SS-6BK series replaces earlier Nupro bellows-sealed valve models with matching port sizes and connection types. Verify your specific model variant (check suffix letters for end connections: -TW, -MM, -1C, etc.) to ensure direct compatibility with your system. Related models in the Nupro B Series include SS-4BK, SS-8BK, and variant configurations.
Works With
- Swagelok manifold systems and subplates
- Standard fluid system piping networks
- Laboratory vacuum and gas handling equipment
- OEM equipment integration (verify port configuration)
