SMC Special Angle Control Valve for PTA Plants (Type SCA)
Introduction
The Type SCA Angle Control Valve is engineered specifically for the challenging environments of the Purified Terephthalic Acid (PTA) industry. It is the premier solution for managing corrosive or viscous fluids, providing precise level control and reliable tank drainage.
Key Design Features
- Integrated Plug & Stem: The one-piece design eliminates cumbersome mechanical joints, ensuring maximum integrity.
- Fully Guided Stability: Utilizes both top-stem bearings and port-guided contouring with full-stroke cleaning grooves to eliminate vibration and fatigue, extending service life in severe service.
- Crystallization Management: Specifically designed to handle PTA slurry through specialized port guiding that prevents material buildup.
| Feature | Specifications |
| Valve Type | Angle Valve |
| Applications | Feed to PTA Crystallizers, Tank Drain, Level Control |
| Valve Action | Push Down to Open (PDTO / Reverse Acting) |
| Valve Size | Titanium: 2″ x 3″ to 8″ x8″; Others: 3″ x 4″ to 10″ x 10″ |
| Materials | Titanium, Hastelloy, CF8, CF8M, CF8C, Duplex Stainless Steel |
| End Connections | ANSI Class 300, 600, or 900 |
| Flow Characteristic | Linear |
| Rangeability | 50:1 CV Ratio |
| Seat Leakage | Standard Class IV (Optional Class V or VI per ANSI/FCI 70-2) |
| Actuator | Double Cylinder with Manual Override |
Optional Features
- Steam Jacket: For temperature maintenance .
- Purge & Flushing Ports: For easy cleaning and maintenance .
- High-Thrust Actuation: Available for high-pressure shutoff requirements .
Industry Leadership & Proven Reliability
- Decades of Field-Proven Experience:SMC has been providing specialized PTA valves since 1986, starting with Samsung-BP, and possesses over 30 years of deep industry expertise.
- Excellence in Advanced Metallurgy:The company excels in engineering solutions for highly corrosive PTA media, with extensive experience in utilizing Titanium, Hastelloy, and Duplex Stainless Steel.
- Critical Process Integration:These valves are widely implemented across core process stages, including Oxidation Reactors, Surge Vessels (Crystallizers), Filters, Dryers, and Hydrogenation Reactors.
- Global Trusted Partner:A long-term supplier for global industry giants such as Samsung, Lotte Chemical, Hanwha, and Formosa, providing both new project installations and ongoing MRO (Maintenance, Repair, and Operations) support.
High-Performance Flow Control Engineered for PTA Environments
- Anti-Crystallization & Clog-Free Performance: The one-piece plug and stem design, integrated with full-stroke cleaning grooves, effectively shears off PTA crystals to ensure smooth operation.
- Maximum Structural Stability: Dual-guidance technology (Top & Port) eliminates vibration and mechanical fatigue, ensuring long-term reliability in severe service conditions.
- Superior Corrosion Resistance: Available in high-grade Titanium and Hastelloy to withstand the most aggressive chemical media in the PTA manufacturing process.
- Precision Process Control: Delivers accurate level and flow management with a 50:1 CV ratio and linear flow characteristics for critical crystallizer feeding.
- Proven Global Track Record: Backed by 30+ years of expertise and trusted by industry leaders including Samsung, Lotte Chemical, and Formosa Plastics.
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