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Help CenterPTFE Bellows GB/T12465-2007 Expansion Joint Flexible for Chemicals
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As a professional manufacturer of fluid handling solutions, Shanghai Zhibang Valve Manufacture Co., Ltd. presents our PTFE Bellows GB/T12465-2007 Expansion Joint, specifically designed for demanding chemical environments. With ISO9001 certification and over eight years of export experience, we ensure every joint delivers reliable performance, corrosion resistance, and long service life. Our expansion joints are widely used in chemical plants, refineries, and pharmaceutical facilities where aggressive media and thermal movements require flexible yet durable connections.
The PTFE bellows expansion joint is engineered to absorb axial, lateral, and angular movements in piping systems, preventing stress on equipment and flanges. Its core component is made from high-purity PTFE, offering exceptional resistance to almost all chemicals, including strong acids, alkalis, and solvents. The bellows design provides flexibility while maintaining pressure integrity, ensuring a leak-free operation even under cyclic conditions. This product strictly follows the Chinese national standard GB/T12465-2007, guaranteeing dimensional consistency and quality.
Key features and benefits include:
- Superior Chemical Resistance – PTFE is inert to most corrosive media, making it ideal for hydrochloric acid, sulfuric acid, caustic soda, and other aggressive chemicals.
- High Temperature Tolerance – Operates reliably from -20°C to +200°C, with optional upgraded materials for higher temperature ranges.
- Excellent Flexibility – Absorbs movement in multiple directions, reducing pipeline stress and extending system life.
- Low Friction Coefficient – PTFE’s smooth surface minimizes pressure drop and prevents media buildup.
- Robust Sealing – Flanged connections with PTFE lining ensure a tight seal and easy installation.
- Compliance with GB/T12465-2007 – Standardized dimensions and testing ensure interchangeability and reliability.
- Customizable Options – Available in various sizes, pressure ratings, and flange standards (ANSI, DIN, JIS) upon request.
Technical specifications (typical values):
| Nominal Diameter (DN) | DN25 – DN600 (custom sizes available) |
| Working Pressure | 0.6 MPa – 2.5 MPa (optional higher) |
| Temperature Range | -20°C to +200°C (customizable up to +260°C) |
| Axial Compression | ±10 mm to ±50 mm (depending on size) |
| Axial Extension | ±5 mm to ±25 mm |
| Lateral Movement | ±5 mm to ±20 mm |
| Angular Deflection | ±5° to ±15° |
| Connection Type | Flanged (ANSI 150# / 300#, DIN PN10/16, JIS 10K/20K) |
| Bellows Material | PTFE (virgin grade, FDA compliant optional) |
| Reinforcement | PTFE + stainless steel wire mesh (optional) |
Our PTFE bellows expansion joints are manufactured with precision and tested under strict quality control. Each unit undergoes hydrostatic and leak tests to ensure zero leakage. The PTFE lining is free of pores and impurities, providing consistent performance even in harsh chemical services. Compared to rubber or metal bellows, PTFE offers superior chemical resistance and longer service life in corrosive environments, reducing maintenance costs and downtime.
Shanghai Zhibang Valve Manufacture Co., Ltd. has been a trusted supplier since 2016, with annual export value exceeding US$1 million. Our products are exported to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. We serve a wide range of industries including chemical, petrochemical, pharmaceutical, and water treatment. Our ISO9001 certified quality management system ensures consistent product excellence and on-time delivery. We offer flexible shipping options from Shanghai, Guangzhou, Hong Kong, and Beijing ports.
Choose our PTFE bellows expansion joint for a reliable, cost-effective solution to manage thermal expansion and vibration in your chemical piping systems. We welcome OEM/ODM inquiries and provide customized solutions to meet your specific requirements. Contact our sales team for a quote or technical consultation today.
Frequently Asked Questions
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Q: What chemicals can the PTFE bellows handle?
A: PTFE is resistant to almost all inorganic and organic chemicals, including strong acids (e.g., hydrochloric, sulfuric), alkalis (e.g., sodium hydroxide), solvents, and oxidizers. However, please consult our technical team for specific media compatibility. -
Q: Can the expansion joint be used for high-pressure steam?
A: Standard PTFE bellows are not recommended for high-temperature steam due to creep limitations. For steam applications, we suggest reinforced or metal bellows with PTFE lining. Please provide your operating conditions for a tailored solution. -
Q: What is the typical lifespan of a PTFE bellows expansion joint?
A: Under normal chemical service and proper installation, the lifespan can exceed 10 years. Factors such as temperature cycles, pressure fluctuations, and media aggressiveness affect longevity. Regular inspection is recommended. -
Q: What flange standards are available?
A: We offer flanges according to ANSI B16.5 (150#, 300#), DIN PN10/16, JIS 10K/20K, and GB/T 9119. Other standards can be customized upon request. -
Q: Can the bellows be repaired if damaged?
A: Due to the integral construction of PTFE bellows, repair is generally not feasible. We recommend replacing the entire unit. Our products are designed for easy replacement, and we offer spare parts support. -
Q: How do I select the correct size and movement capacity?
A: You need to provide pipe diameter, operating temperature, pressure, and expected movements (axial, lateral, angular). Our engineering team can calculate the required bellows length and compensation capacity. Contact us with your system parameters. -
Q: Is the product suitable for pharmaceutical or food-grade applications?
A: Yes, we can supply PTFE bellows made from FDA-compliant virgin PTFE. Please specify this requirement when ordering. -
Q: What is the minimum order quantity?
A: Our standard MOQ is 1 piece for stock sizes, and 5-10 pieces for custom sizes. We accept small trial orders to evaluate product quality.
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