2 THE STAINLESS STEEL PLUG VALVES
ProductModel:X43W
Nominal Diameter:15-300mm
Nominal Pressure:1.0MPa
suitable temperature:-29°C-300°C
Suitable Medium:Nitric acid kind of

TWO-WAY STAINLESS STEEL PLUG VALVES
Optimized for China Manufacturing Network & Global Chemical Industry Buyers
Product Overview
The X43W Two-Way Stainless Steel Plug Valve is a corrosion-resistant, high-performance valve engineered for aggressive nitric acid (HNO) environments in chemical, petrochemical, and fertilizer industries. Constructed from 316L stainless steel with a PTFE/Kalrez®-coated plug, this valve ensures reliable shutoff and flow control at temperatures up to 300°C. Its robust design and universal compatibility make it ideal for nitric acid production, storage, and transfer systems.
For Engineers & Chemical Plant Operators
Key Technical Features
Feature |
Details |
Material |
Body: 316L Stainless Steel |
Pressure Rating |
1.0 MPa (10 Bar) @ 300°C (PN16 Class) |
Temperature Range |
-29°C to 300°C (-20°F to 572°F) |
End Connection |
Flanged (ANSI B16.5), Threaded (NPT/BSP) |
Design Standard |
GB/T 15185, ISO 9001, CE (PED) |
Sealing Technology |
Bubble-tight PTFE-coated plug with metal backup ring |
Performance Highlights
- Nitric Acid Resistance:
- 316L stainless steel resists pitting and crevice corrosion in HNO3 (up to 65%).
- Electropolished internal surfaces (Ra ≤ 0.4μm) minimize contamination risks.
- Universal Compatibility:
- ANSI/JIS flanges or NPT/BSP threads for global pipeline integration.
- Bi-directional flow design reduces installation complexity.
- Low-Torque Operation:
- Self-lubricating PTFE seals minimize friction; suitable for manual or automated actuation.
For Procurement & Safety Managers
Quality & Compliance
- Certifications:
- ATEX Zone 1/21 (Explosion-Proof), SIL 3 (IEC 61508), PED 2014/68/EU.
- 3.1 Material Certificates for critical components.
- Testing:
- 100% helium leak test (1×10-9 mbar·l/s).
- Cyclic endurance test: 10,000 cycles @ 300°C.
Why Choose X43W?
- Safety: Anti-static device prevents sparking in flammable environments.
- Traceability: Laser-etched serial numbers for material/process audits.
- Warranty: 36-month warranty against manufacturing defects.
For Distributors & EPC Contractors
Commercial Advantages
- Global Approvals: Pre-approved for use in EU, North America, and GCC countries.
- Packaging: Export-grade wooden crates with vacuum-sealed anti-corrosion coating.
- Lead Times: 15-25 days for standard sizes; 45 days for custom alloys.
Customization Options
- Special Alloys: Hastelloy® C-276 for ultra-high HNO3 concentrations.
- Actuation: Pneumatic (NAMUR interface) or hydraulic actuators with limit switches.
- Coatings: FEP/PFA lining for HF acid resistance.
For End Users (Chemical Plants)
Installation & Maintenance
- Quick Fit: Flanged ends reduce installation time by 40% vs. threaded valves.
- Robust Design: Withstands vibrations in reactor feed lines and storage terminals.
- Diagnostic Port: Optional pressure/temperature monitoring via integrated sensors.
Typical Applications
- Nitric Acid Production: Concentration/distillation columns, absorption towers.
- Fertilizer Plants: Urea/ammonia synthesis loops, nitric acid storage.
- Petrochemical: Nitration reactors, explosive manufacturing.
- Research Labs: High-purity HNO3 transfer systems.







