The NUPRO SS-4BK-MB-1C is a heavy-duty industrial bellows-sealed valve engineered for leak-tight shutoff and contamination-free service in analytical, process, and pneumatic systems. Its metal bellows isolates the stem threads and actuator from the process fluid, eliminating stem-seal leakage and extending service life in corrosive or high-purity applications.
NUPRO SS-4BK-MB-1C Technical Specifications
| Body Material | 316 Stainless Steel |
|---|---|
| End Connections | 1/4 in. Swagelok Tube Fitting |
| Flow Path | Straight, 0.172 in. orifice |
| Seal Type | Metal bellows, secondary PTFE packing |
| Actuation | Manual, knurled handle |
| Pressure Rating | Up to 1,000 psig (69 bar) |
| Temperature Rating | -20 to 400 °F (-29 to 204 °C) |
| Mounting | Panel mount, 1/4 in. panel thickness |
Key Engineering Features
- Hermetic metal bellows provides zero stem-seal leakage and isolates process fluid from the actuator.
- 316 stainless steel body and wetted parts resist corrosion in aggressive media.
- Swagelok tube fitting ends ensure reliable, leak-tight connections without threading.
- Manual knurled handle allows precise flow control and positive shutoff.
- Panel-mount design simplifies installation in instrumentation panels and cabinets.
Industrial Applications
- Analytical instrumentation and sampling systems
- High-purity gas and liquid handling
- Corrosive chemical and petrochemical processes
- Pneumatic control panels and test stands
- Research and laboratory fluid circuits
For technical inquiries, dimensional drawings, or replacement support for NUPRO SS-4BK-MB-1C, contact the Pro-Hydraulic engineering team.
PRODUCT IMAGES


NUPRO SS-4BK-MB-1C Bellows-Sealed Valve
⚡ Emergency Plant Maintenance & Ready-to-Ship Notice:
- Authentic & Fully Tested: 100% bench tested for hydraulic response, pressure rating, and null-bias stability before dispatch.
- Fast Dispatch: In-stock units ready for same-day dispatch via DHL / FedEx Express directly to your plant.
- Pre-Shipment Verification: High-definition photos, video testing runs, and serial number verification provided prior to shipment.
- Peace of Mind: Covered by our 12-Month Replacement Warranty.
Shop the NUPRO SS-4BK-MB-1C Bellows-Sealed Valve. This precision-engineered industrial component delivers reliable fluid control for heavy-duty systems.