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詳細情報 |
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| モデル番号: | VS-190SR10FC-H | 接続フォーム: | クランプ |
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| チャネルタイプ: | まっすぐ | 構造: | 浮遊球 |
| バルブタイプ: | 浮遊球 | 関数: | ブローダウン、リリーフ |
| 温度範囲: | 通常の温度 | サイズ範囲: | 1インチ12インチ |
| 生産能力: | 50000pc / y | シートマテリアル: | PEEK,PCTFE |
| アクチュエータタイプ: | 空気圧 | 圧力評価: | 高圧 |
| 化学両立性: | 幅広い範囲 | 温度抵抗: | -70°F〜600°F |
| 放射線抵抗: | 素晴らしい | ||
| ハイライト: | VS-190SR10FC-H Pneumatic Ball Valve,Peek Seated Ball Valve,Pneumatic Actuator Ball Valve |
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製品の説明
Peek Seated Ball Valve with Pneumatic Actuator Peek Ball Valve PCTFE
There are two main categories of polymers used for ball valve seats: PTFE (both virgin and filled) and PEEK. These materials are popular for several reasons, with each being better adapted to specific applications.
Ball Valves
Ball valves control the flow of water, oil, steam, air, slurries, and corrosive fluids. They are commonly found in:
- HVAC systems
- Petrochemical processing
- Food processing
- Water distribution systems
- Automatic combustion systems
- Instrumentation control
While ball valves consist of various components (stem, stem nut, ball, body), the ball valve seat is one of the most crucial parts. Ball valve seats must:
- Distribute seating stress uniformly
- Achieve a solid seal
Key Properties of Ball Valve Seat Materials
Materials for ball valve seats must possess six critical properties:
- Low friction to reduce stem torque
- Excellent wear resistance
- Good stress recovery
- Sufficient elasticity to maintain a solid seal
- Dimensional stability
- Chemical compatibility with the media involved
For food, dairy, or pharmaceutical applications, FDA-approved materials may be required. While various polymer materials are available, PTFE, filled-PTFE, and PEEK are the most commonly used.
Material Properties for Harsh Environments
Additional considerations for operating environments include:
- Dimensional stability at extreme temperatures (including cryogenic)
- Performance during sterilization routines (hot water, steam, caustic cleaning materials)
- Low coefficient of hygroscopic expansion for extended water/humidity exposure
- Flame retardant or fire-resistant properties
- Radiation resistance
PTFE Ball Valve Seats
PTFE has long been a popular choice for ball valve seats and is available in FDA-approved grades. Key characteristics:
- Lowest coefficient of friction of any thermoplastic
- Capable of dry running (no lubricants required)
- Excellent wear resistance and good stress recovery
- Good seal performance in extreme temperatures and corrosive environments
- Operating temperature range: -429°F to 400°F
- Fire resistant, hydrophobic, and non-wetting
PTFE works well with sanitation/sterilization applications and is chemically compatible with most media, except fluorine and liquid alkalis.
Filled-PTFE Ball Valve Seats
Common filled-PTFE options:
- Carbon graphite reinforced PTFE: Better for high temperatures/pressures, improved wear characteristics, reduced cold creep
- Glass-filled PTFE: Better extrusion resistance, preferred for food/dairy/pharmaceutical industries
- Stainless steel-reinforced PTFE: Higher temperature range (up to 550°F), handles higher pressures
PEEK Ball Valve Seats
PEEK offers distinct advantages:
- Temperature range: -70°F to 600°F
- Excellent performance in high temperature/pressure applications
- Superior radiation resistance for nuclear applications
- Flame retardant properties
- Good performance with continuous hot water/steam exposure
PEEK is more abrasion-resistant than PTFE but has more limited chemical compatibility (avoid sulfuric acid and corrosive environments).
Conclusion
PTFE, filled PTFE, and PEEK are excellent high-performance polymers for ball valve seats across a wide range of industrial applications.
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