Overview
The Swagelok SS-12NBF8-G is a severe service union bonnet needle valve designed for high-pressure applications requiring precise metering and reliable sealing. Constructed of premium 316 stainless steel, this valve delivers consistent performance in corrosive environments and demanding industrial settings. With a maximum working pressure of 6000 psi and a 2.4 Cv rating, the SS-12NBF8-G accommodates accurate flow regulation for gases, liquids, and critical media in chemical, petrochemical, instrumentation, and research applications.
Key Features
- Severe service union bonnet construction for superior sealing and easy stem access
- 316 stainless steel body provides excellent corrosion resistance and durability
- Ball stem design with Grafoil packing ensures tight shutoff and long service life
- 1/2″ FNPT end connections for secure installation in standard piping systems
- Manual hand wheel operation for simple, intuitive control
- Rated to 6000 psig, suitable for high-pressure gas and liquid metering
Technical Specifications
- Pressure Rating: 6000 psig
- Flow Coefficient (Cv): 2.4
- Connection Type: 1/2″ FNPT (Female National Pipe Thread)
- Stem Design: Ball stem
- Packing Material: Grafoil
- Body Material: 316 stainless steel
- Operation: Manual hand wheel
- Weight: 2.08 lbs
- Valve Type: Severe service union bonnet needle valve
Typical Applications
The Swagelok SS-12NBF8-G is widely used in:
- Chemical and petrochemical processing for precise flow control
- Laboratory and analytical instrumentation systems
- High-pressure gas delivery and metering systems
- Liquid sampling and injection applications
- Corrosive or high-temperature service where stainless steel is required
- Research and development environments requiring accurate throttling
Compatibility & Replacements
Compatible With
- Standard NPT piping systems (1/2″ female connections)
- High-pressure gas cylinders and manifolds
- Laboratory analytical equipment
- Instrumentation and control panels
- Chemical injection and metering skids
Replaces / Drop-In Replacement For
- Other 1/2″ FNPT severe service needle valves requiring 6000 psi rating and stainless steel construction
- Verify compatibility with your system integrator before ordering
Works With
- Manual operation — no electrical connection required
- Standard NPT thread piping and fittings (SAE, ISO, NPT standards)
- Swagelok manifold blocks and integral bonnet designs
