Professional O-Ring and Oil Seal Manufacturer, Sealing Solution Supplier Since 2008.
Industrial Spring Energized Seals | PTFE-PHB Composite Material
Ideal for Chemical, Aerospace, Semiconductor & Pharmaceutical Equipment Sealing
Our spring energized seals, crafted from a high-performance PTFE and PHB (Polyhydroxybenzoate) composite, redefine reliability in extreme industrial sealing scenarios. This advanced material blend merges PTFE’s exceptional chemical inertness—resisting corrosive substances like aqua regia, hydrofluoric acid, and concentrated alkalis—with PHB’s superior mechanical strength and thermal stability, enabling consistent operation across a wide temperature range of -200℃ to 300℃.
Boasting a low friction coefficient of 0.05-0.1 for minimal wear and energy loss, these seals handle pressures up to 120MPa without deformation, ensuring long-lasting, leak-free performance even in high-pressure, frequent-start-stop equipment. They meet strict hygiene standards for food and pharmaceutical use, while their excellent dimensional stability suits precision semiconductor manufacturing. Ideal for chemical reactors, aerospace hydraulic systems, and industrial pumps, these seals deliver unmatched durability and versatility for critical applications.
5.0
design customization
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Please fill out the form below to request a quote or to request more information about us. please be as detailed as possible in your message, and we will get back to you as soon as possible with a response. we're ready to start working on your new project, contact us now to get started.
1. Product Advantages
- Extreme Environmental Adaptability: Blended with PTFE and PHB (Polyhydroxybenzoate), the seals operate stably in temperatures ranging from -200℃ to 300℃. They resist strong corrosives like aqua regia, hydrofluoric acid, and concentrated alkalis, with less than 5% sealing performance attenuation after 500 hours of immersion in 98% sulfuric acid.
- Superior Mechanical Performance: Withstand pressures up to 120MPa, far exceeding traditional PTFE or rubber gaskets. The low friction coefficient (0.05-0.1) reduces wear on moving parts, cutting energy consumption and extending equipment service life. PHB enhances dimensional stability, ensuring less than 1% deformation under 10MPa pressure at 100℃ for 24 hours.
- Hygiene & Precision Compliance: Meet global food-grade (FDA) and pharmaceutical industry standards, with no material migration to avoid product contamination. Their low thermal expansion coefficient makes them suitable for high-precision semiconductor equipment, preventing particle pollution during wafer etching or vacuum coating.
2. Working Principle
Forever Seals’ PTFE + PHB spring energized seals adopt a composite structure of "polymer sealing lip + metal spring". The PHB-reinforced PTFE lip provides a tight contact surface with the sealing groove, while the built-in metal spring (optional stainless steel 316L or Inconel) applies constant preload. When the system pressure increases, the spring compresses further, driving the sealing lip to deform and fit the mating surface more tightly—ensuring zero leakage even in low-pressure startup or high-pressure operation. The self-lubricating PTFE minimizes friction during reciprocating or rotating motion, avoiding "stick-slip" issues.
3. Product Details
The seals feature a material composition of PTFE as the matrix, PHB as the reinforcement, and a metal spring available in stainless steel 316L or Inconel. They maintain stable performance across a temperature range of -200℃ to 300℃ and can resist pressures up to 120MPa. The friction coefficient is controlled between 0.05 and 0.1 to reduce wear, while the sealing lip has a surface finish of Ra ≤ 0.8μm for tight contact. Standard sizes cover DN5 to DN500, and non-standard dimensions are fully customizable to meet specific application needs. Additionally, the product complies with FDA, RoHS, and REACH certifications to meet global industry standards.
4. Application Range
- Chemical Industry: Sealing for reactors, centrifugal pumps, and control valves, resisting corrosion from organic solvents and strong acids/bases.
- Aerospace & Defense: Fuel valve sealing in rocket engines, hydraulic system sealing in supersonic aircraft, adapting to extreme temperature and pressure fluctuations.
- Food & Pharmaceutical: Sealing for food mixing tanks, pharmaceutical filling machines, and sterile pipelines, complying with hygiene requirements.
- Semiconductor Manufacturing: Sealing for plasma etchers, CVD equipment, and vacuum chambers, preventing process gas leakage and particle contamination.
- Energy Sector: Sealing for oilfield wellheads, nuclear power plant heat exchangers, and solar panel manufacturing equipment.
5. FAQ
Q1: Can the seal be customized for non-standard sizes?
A1: Yes. Forever Seals provides one-stop customization services, including size adjustment (DN5-DN500+), spring material replacement (e.g., high-temperature Inconel for aerospace), and surface coating modification (e.g., anti-adhesion coating for sticky media).
Q2: How long is the service life of the seal in high-temperature environments?
A2: Under normal operating conditions (300℃ max, 80MPa max), the service life is 2-3 times that of traditional PTFE seals—typically 18-24 months for continuous operation in chemical reactors.
Q3: Is the seal compatible with food-grade media like dairy or edible oils?
A3: Absolutely. The PTFE + PHB composite meets FDA 21 CFR 177.1550 standards, with no toxic substances released. It is widely used in dairy processing lines and edible oil storage tanks.
6. Forever Seals’ Selling Points
- 15+ Years of Expertise: Focused on high-performance sealing solutions since 2003, with a R&D team that holds 15+ patents for extreme-condition seal designs.
- Global Quality Control: Manufactured in ISO 9001-certified facilities, with 100% pressure and leakage testing before delivery. Raw materials are sourced from top suppliers (e.g., DuPont for PTFE) to ensure consistency.
- Fast Response & Support: Provide 24-hour technical consultation, 7-day sample delivery for standard sizes, and 30-day lead time for customized orders. Offer on-site installation guidance and after-sales maintenance services in major industrial regions.
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