Product Overview
RUNXING's
PTFE Lined Bellow Expansion Joint is a high-performance pipeline compensation component designed for harsh industrial environments. Integrating advanced material technology and precision manufacturing, this product effectively absorbs thermal expansion and contraction, vibration, and misalignment in pipelines, ensuring stable and safe operation of the entire pipeline system.
Our core
304 Stainless Steel Lined PTFE Bellow Expansion Joint features excellent corrosion resistance and pressure resistance, making it suitable for various corrosive media transportation pipelines. The combination of 304 stainless steel and PTFE lining not only enhances the product's structural strength but also ensures superior chemical inertness, avoiding medium contamination and pipeline damage. As a professional manufacturer, we also provide
Negative Pressure Resistant PTFE Corrugated Expansion Joint to meet the special requirements of negative pressure working conditions, providing comprehensive pipeline compensation solutions for global customers.
Technical Specifications
Core Material Specifications
- Bellows Material: 304 Stainless Steel (SUS304), optional SUS316 or SUS201 according to customer needs
- Lining Material: High-purity PTFE (Polytetrafluoroethylene), with excellent chemical resistance and high-temperature resistance
- Flange Material: 304 Stainless Steel, matching the bellows material for consistent performance
- Sealing Material: PTFE + EPDM composite, ensuring reliable sealing and long service life
Key Performance Parameters
- Working Pressure: -0.1MPa to 2.5MPa (negative pressure resistant type available for -0.1MPa working condition)
- Working Temperature: -50℃ to 200℃
- Nominal Diameter: DN25 to DN1200 (customizable for special sizes)
- Compensation Amount: Axial compensation ±10mm to ±50mm; Lateral compensation ±5mm to ±25mm (varies by diameter)
- Corrosion Resistance: Resistant to acids, alkalis, salts, organic solvents and other corrosive media
- Pressure Rating: Conforms to ANSI, EN/CE standard pressure grades
Product Features
Core Advantages
- Superior Corrosion Resistance: The PTFE lining has excellent chemical inertness, resisting almost all corrosive media such as strong acids, strong alkalis, and organic solvents, making the PTFE Lined Bellow Expansion Joint suitable for various harsh working environments.
- Reliable Negative Pressure Resistance: Our Negative Pressure Resistant PTFE Corrugated Expansion Joint is specially designed with reinforced bellows structure, which can stably work under negative pressure conditions without deformation or collapse, ensuring the safety of the pipeline system.
- High Structural Strength: Adopting 304 stainless steel as the main body material, it has high tensile strength and fatigue resistance, and the bellows is precision formed by professional equipment, ensuring long-term stable operation under frequent thermal expansion and contraction.
- Good Compensation Performance: It can effectively absorb axial, lateral and angular displacements of the pipeline, reducing the stress between pipeline interfaces and equipment, and protecting pumps, valves and other key equipment.
- Low Flow Resistance: The smooth PTFE lining reduces the flow resistance of the medium, improves the transportation efficiency, and avoids the accumulation of medium, which is especially suitable for the transportation of high-purity and viscous media.
Product Principle
The PTFE Lined Bellow Expansion Joint uses the elastic deformation of the stainless steel bellows to absorb the displacement generated by the thermal expansion and contraction of the pipeline and the vibration from the equipment. The PTFE lining is closely attached to the inner wall of the bellows, isolating the medium from the stainless steel body, avoiding the corrosion of the bellows by the medium. At the same time, the flange at both ends is connected with the pipeline through bolts, and the sealing structure ensures that there is no medium leakage. For the negative pressure resistant type, the internal support ring is added to enhance the rigidity of the bellows, preventing it from being sucked flat under negative pressure.
How to Use the Product
- Preparation: Check whether the model, specification and pressure rating of the PTFE Lined Bellow Expansion Joint match the pipeline requirements. Clean the flange end face of the pipeline to ensure no debris, rust or other impurities.
- Installation Position Confirmation: Install the expansion joint at the designated position of the pipeline, ensuring that the flow direction of the medium is consistent with the direction marked on the product. For the pipeline with large displacement, leave enough compensation space for the expansion joint.
- Flange Connection: Align the flange holes of the expansion joint with the pipeline flange holes, put on the bolts, and tighten the nuts evenly in a diagonal order. Do not over-tighten to avoid damaging the flange or sealing surface.
- Support Installation: Install fixed supports or guide supports near the expansion joint according to the pipeline design requirements to prevent the expansion joint from bearing excessive pipeline weight.
- Pressure Test and Debugging: Conduct pressure test on the installed pipeline system. After the test is qualified, check whether the expansion joint works normally during the pipeline operation, and adjust if necessary.
Application Scenarios
RUNXING's PTFE Lined Bellow Expansion Joint is widely used in various industrial fields that require corrosion resistance and pipeline compensation. The specific application scenarios include:
- Chemical Industry: Used in the transportation pipelines of acids, alkalis, salts and organic solvents in chemical plants, such as sulfuric acid, hydrochloric acid, nitric acid and other corrosive medium pipelines.
- Pharmaceutical Industry: Applied in the pipeline system of pharmaceutical production, which can ensure the high purity of the medium and avoid pollution, meeting the GMP certification requirements.
- Food Processing Industry: Used in the transportation pipelines of food additives, beverages, edible oils and other materials, the PTFE lining is non-toxic and odorless, complying with food safety standards.
- Petrochemical Industry: Suitable for oil refining, chemical fertilizer and other petrochemical production processes, resisting the corrosion of crude oil, chemical intermediates and other media.
- Water Treatment Industry: Used in the pipeline system of sewage treatment plants, especially in the pipelines of acidic and alkaline sewage treatment, with excellent corrosion resistance and long service life.
- Power Industry: Applied in the flue gas desulfurization and denitrification pipelines of thermal power plants, resisting the corrosion of desulfurization agents and flue gas, ensuring the stable operation of the power generation system.
The application of our product in these scenarios can effectively reduce the maintenance cost of the pipeline system, improve the operation efficiency of the equipment, and ensure the safe and stable production of the enterprise.
In order to meet the personalized needs of different purchasers, RUNXING provides a variety of customization options for the PTFE Lined Bellow Expansion Joint. Customers can put forward customized requirements according to their actual working conditions, and our professional team will provide targeted solutions.
- Size Customization: Nominal diameter, length, flange size, etc. can be customized according to the pipeline design requirements, covering DN25 to DN1200 and above special sizes.
- Material Customization: The bellows material can be customized to SUS316, SUS201 and other stainless steel grades according to the medium and working environment; the lining material can be customized to modified PTFE, PFA and other materials with special performance requirements.
- Performance Customization: For special working conditions such as high pressure, high temperature, and strong negative pressure, the product structure can be optimized to improve the corresponding performance parameters.
- Flange Standard Customization: Flange standards of different countries and regions can be customized, such as ANSI, DIN, JIS, GB, etc., to match the customer's existing pipeline system.
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