Pfa Ptfe Fep Lined Ball Valve
- Place of Origin:
- Wenzhou,China
- Packing:
- Suitable Packing for Sea/Air Transport
- Connection:
- Flange
- Pressure:
- PN10,PN16,150LBS
- Temperature:
- PTFE:-29℃~180℃, PFA:-29℃~200℃, FEP:-29℃~150℃
- Gasket:
- PTFE, PFA, FEP,etc;
A lined ball valve isolates hostile chemical streams from ductile iron or carbon steel housing through a seamless, locked fluoropolymer barrier. Pressurized process piping carrying concentrated hydrochloric acid, wet chlorine, or caustic solutions relies on this quarter-turn device to achieve bubble-tight shutoff where exotic metal alloys fail against pitting. Mechanical anchoring grooves prevent sleeve collapse under full vacuum conditions, ensuring steady flow containment without external leakage.
Thermal Thresholds and Compression Limits in Fluoroplastic Sealing
Selecting a ptfe lined ball valve resolves general acid handling up to 180°C while resisting cold flow deformation under continuous line pressure. Machined compression rings maintain seating stress across severe thermal fluctuations.
| Polymer Grade | Continuous Service Limit | Mechanical Resilience | Vacuum Stability |
|---|---|---|---|
| Modified Fluoroplastic | -20°C to 200°C | Resists crack stress | Retains shape with T-slots |
| Perfluoro Resin | -20°C to 150°C | Dense molecular wall | Locks over cast cores |
| Standard Sintered Resin | -20°C to 180°C | Low friction coefficient | Requires retention collars |
High-Purity Transfer and Molecular Permeation Defense
Transfer systems handling hot nitric acid, semiconductor-grade reagents, or chlor-alkali derivatives require pfa lined ball valves. Melt-processible perfluoroalkoxy polymers provide virtually pore-free encapsulation over the metallic core, dropping the permeation rate to near zero. This barrier prevents sub-surface acid migration toward structural castings, eliminating catastrophic shell perforation and fugitive emissions.
Viscous Media Flow and Anti-Adhesion Properties
Pipelines operating below 150°C achieve superior anti-stick performance with a fep lined ball valve. Fluorinated ethylene propylene resin delivers uniform wall thickness across intricate flow paths, preventing slurry buildup and abrasive wear in sulfuric neutralization lines.
Manual Actuation Mechanics and High-Torque Control
Manual operation of larger bore assemblies demands worm gear reducers to conquer steep seating torque without inducing line vibration. Manual gearboxes deliver smooth 90-degree closure, counteracting hydraulic shock while maintaining ISO 5211 mounting flange alignment. Spark testing at 20 kV verifies complete dielectric insulation across all wetted surfaces before field pressurization.
Product Parameter
| Materials of Main Parts | |||||
| No. | Part Name | Material List | |||
| 1 | Body | HT250 | WCB | CF8 | CF8M |
| 2 | Ball | WCB | WCB | CF8 | CF8M |
| 3 | Lining/Seat | PTFE PFA FEP | |||
| 4 | Packing Gland | HT250 | WCB | CF8 | CF8M |
| 5 | Packing | PTFE | |||
| Technical Specification | ||||
| Design & Manufacture Standard | GB/T 12237 | API 608/ API 6D | ||
| Face-to-face Dimension Standard | HG/T 3704 | ASME B16.10 | ||
| Flange Standard | HG/T 20592 | ASME B16.5 | ||
| Inspection and Test Standard | GB/T 13927 | API 598 | ||
| Nominal Pressure | 1.0MPa | 1.6Mpa | 150LB | |
| Test Pressure | Shell Test | 1.5MPa | 1.5MPa | 1.5MPa |
| High Pressure Sealing | 1.1MPa | 1.1MPa | 1.1MPa | |
| Low Pressure Sealing | 0.6MPa | 0.6MPa | 0.6MPa | |
| Temperature Range | PFA:-29℃~200℃ PTFE:-29℃~180℃ FEP:-29℃~150℃ | |||
| Applicable Medium | Strong corrosive medium i.e.hydrochloric acid,Nitric acid,Hydrofluoric acid,Liquid chlorine,Sulfuric acid and Aqua regia etc. | |||
| Note：Test standard refers general valve standard,high pressure should be customized for processing. | ||||
Dimensions
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