Comprehensive guide to valve seat materials and their applications
The seat material is a critical component in butterfly valve performance, affecting temperature range, chemical compatibility, and sealing capability. TTV offers a comprehensive range of seat materials to meet diverse industrial requirements.
| Material | Temperature Range | Suitable Applications | Limitations |
|---|---|---|---|
| EPDM | -20°C to 110°C |
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| EPDM High Temperature | -20°C to 130°C |
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| NBR | -10°C to 90°C |
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| Hypalon | -10°C to 90°C |
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| FKM | -5°C to 180°C |
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| Silicone | -40°C to 150°C |
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| High Temperature Silicone | -50°C to 160°C |
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| Epichlorohydrin | -30°C to 130°C |
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Note: Temperature ranges and chemical compatibility should be verified for specific operating conditions. Contact our technical team for detailed compatibility information.
Temperature: -20°C to +110°C
Applications: Water, sea water, alcohols, organic salt solutions, mineral acid solutions, alkaline mineral bases
Characteristics: Excellent weather resistance, WRAS approved for potable water, not recommended for organic hydrocarbons
Temperature: -20°C to +130°C
Applications: Water
Characteristics: Enhanced temperature capability for water applications, not recommended for hydrocarbons
Temperature: -10°C to +90°C
Applications: Mineral oils, vegetable oils, gases, non-aromatic hydrocarbons, vegetable and animal fats, air
Characteristics: Excellent oil resistance, not suitable for organic acids, some mineral acids, chlorine, alcohols, or aromatic hydrocarbons
Temperature: -10°C to +90°C
Applications: Mineral acid solutions, organic acids, inorganic acids, oxidizing substances
Characteristics: Excellent acid resistance, not suitable for mineral oils, vegetable oils, hydrocarbons, fats, or ketones
Temperature: -5°C to +180°C
Applications: Acids, fats, hydrocarbons, vegetable oils, mineral oils, fuels
Characteristics: Superior chemical resistance, not suitable for steam and hot water above 130°C, gasoline, ketones, amines, or Freon 22
Temperature: -40°C to +150°C
Applications: High and low temperature resistance, food grade applications
Characteristics: Wide temperature range, FDA approved, not suitable for hydrocarbons, acids, bases, or atmospheric agents
Temperature: -50°C to +160°C
Applications: Superheated water
Characteristics: Enhanced temperature capability, not suitable for hydrocarbons, strong acids, or strong bases
Temperature: -30°C to +130°C
Applications: Ozone resistance, hydrocarbons, aromatic oils
Characteristics: Good ozone resistance, not suitable for steam, intermediate resistance to oils
Temperature: -25°C to +200°C
Applications: Aggressive chemicals, acids, solvents, high purity
Characteristics: Exceptional chemical resistance, non-stick surface, FDA approved, low friction
Temperature: -25°C to +200°C
Applications: High pressure chemical service, abrasive media
Characteristics: Enhanced mechanical strength, better wear resistance than pure PTFE
Temperature: -190°C to +850°C
Applications: Extreme temperatures, steam, thermal cycling
Characteristics: Highest temperature capability, no elastomer degradation, fire-safe
Temperature: -200°C to +650°C
Applications: High temperature, steam, thermal shock
Characteristics: Excellent thermal stability, chemical inert, self-lubricating
Water Applications: EPDM is the standard choice for potable water and general water service due to excellent resistance and WRAS approval.
Oil & Petroleum: NBR (Nitrile) provides superior resistance to oils, fuels, and petroleum products.
Chemical Service: PTFE offers broad chemical compatibility and can handle aggressive media.
High Temperature: Metal seats are required for temperatures above 200°C or where tight shutoff is not critical.
Food & Pharmaceutical: FDA-approved elastomers or PTFE ensure compliance with hygiene standards.