The NUPRO SS-4H-TW is a heavy-duty industrial diaphragm valve engineered for precise flow control in high-purity and corrosive fluid systems. Featuring a 316L stainless steel body and a PTFE diaphragm, this valve ensures leak-tight shutoff and minimal dead volume, making it ideal for analytical, pharmaceutical, and semiconductor applications.
NUPRO SS-4H-TW Technical Specifications
| Body Material | 316L Stainless Steel |
| Diaphragm Material | PTFE |
| Connection Type | 1/4 in. Swagelok Tube Fitting |
| Maximum Working Pressure | 300 psig (20.6 bar) |
| Temperature Range | -20°F to 300°F (-28°C to 148°C) |
| Flow Coefficient (Cv) | 0.20 |
| Actuation | Manual, Hand-Operated |
| Mounting | Panel Mount |
Key Engineering Features
- PTFE diaphragm provides excellent chemical resistance and long cycle life.
- 316L stainless steel body for superior corrosion resistance.
- Compact design with low internal volume for minimal purge requirements.
- Swagelok tube fitting ends ensure leak-tight connections without additional seals.
- Panel mountable for secure installation in instrumentation systems.
Industrial Applications
- Analytical instrumentation and sample handling systems.
- Pharmaceutical and biotech process lines requiring high purity.
- Semiconductor manufacturing equipment for corrosive gas and liquid control.
- Research laboratories and pilot plants.
- Chemical injection and dosing systems.
For technical inquiries, dimensional drawings, or replacement support for NUPRO SS-4H-TW, contact the Pro-Hydraulic engineering team.
PRODUCT IMAGES


NUPRO SS-4H-TW Stainless Steel Diaphragm 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-4H-TW Stainless Steel Diaphragm Valve. This precision-engineered industrial component delivers reliable fluid control for heavy-duty systems.