Rubber Lined Rubber Expansion Joint
1. Chemically inert PTFE (F4) or FEP (F46) lining resists aggressive acids, alkalis, and organic solvents.
2. Dual-layer construction: PTFE inner barrier + EPDM/NBR outer body combines chemical resistance with flexibility.
3. Self-cleaning non-stick surface eliminates scaling, fouling, and product adhesion.
4. Carbon steel backing flange provides structural rigidity at connection points.
5. Bore range DN32–DN600, meeting GB/T 26121 standard with ANSI/DIN/JIS flange compatibility.
6. Temperature range –30°C to +150°C, vacuum-rated with optional vacuum ring for negative-pressure service.
7. Available with flanged or union-end connections for drop-in replacement of rigid spool pieces.
8. Engineered for pickling lines, FGD desulfurization, semiconductor wet stations, and pharmaceutical CIP systems.
Rubber Lined Rubber Expansion Joint
DEVEL PTFE Lined Rubber Expansion Joints are technically engineered for aggressive chemical transport and highly corrosive piping systems where standard synthetic elastomers degrade. By mechanical-bonding a virgin Polytetrafluoroethylene (PTFE/F4) or FEP/F46 interior liner to a heavy-duty EPDM or NBR rubber bellows shell, these advanced flexible connectors provide absolute chemical inertness combined with exceptional multi-axis thermal expansion and vibration compensation.
Key Features at a Glance
- Extra-thick Inner Protective Layer (PTFE or Specialized Wear-resistant Compound)
The seamless virgin PTFE (F4) or FEP (F46) interior liner creates a chemically inert barrier that is completely impervious to virtually all industrial chemicals including concentrated sulfuric acid (98%), hydrochloric acid, nitric acid, caustic alkalis, organic solvents, and aggressive oxidizers. The PTFE lining thickness is engineered to exceed industry minimums, providing extended service life even under continuous exposure to corrosive media at elevated temperatures. - High Structural Stability with Carbon Steel or Ductile Iron Backing Flanges
The outer structural frame utilizes heavy-duty carbon steel Q235 (galvanized, hot-dip, or epoxy-coated) or ductile iron backing flanges to withstand significant mechanical loads, pipeline anchoring forces, and external environmental stress. This dual-material architecture — a chemically inert PTFE interior protected by an elastomeric body and reinforced by rigid metal flanges — delivers the optimal balance of chemical resistance and mechanical integrity required in demanding process installations. - Outstanding Resistance to Abrasive Slurries, Strong Acids & Aggressive Chemicals
Beyond chemical inertness, the ultra-smooth PTFE lining surface actively resists particle adhesion and scale buildup, making it ideal for abrasive slurry transport where both corrosion AND erosion are present. The non-stick PTFE surface prevents crystallization of dissolved solids and minimizes fluid drag forces, reducing pumping energy requirements while maintaining full flow capacity over extended operating periods. - Advanced Anti-Scaling Geometry for Ultra-clean Process Environments
The seamless, non-porous PTFE interior surface eliminates microscopic crevices where bacteria, scale, or crystalline deposits can accumulate. This makes DEVEL PTFE-lined joints particularly valuable in pharmaceutical, semiconductor, and food-grade applications where fluid purity must be maintained from source to discharge without contamination risk. - Ideal For Chemical Processing, Desulfurization Systems & Mining Tailing Lines
Purpose-built integration targets include Flue Gas Desulfurization (FGD) scrubber circuits handling acidic condensate, pickling lines in metal treatment plants transporting hot acidic baths, mining tailing pipelines carrying highly corrosive leachate solutions, and semiconductor ultrapure water systems requiring zero-leaching materials of construction.
Material Architecture & Technical Features
- Extreme Chemical Inertness: Seamless PTFE liner provides unparalleled resistance against concentrated strong acids, toxic caustics, alkali chemical compounds, and aggressive organic solvents.
- Robust Reinforcement Frame: Outer elastomeric matrix is structural-reinforced with multi-layer high-tensile synthetic fiber plies and embedded steel wire carcasses to prevent pressure deforming.
- Advanced Anti-Scaling Geometry: The ultra-smooth, non-stick interior lining surface actively prevents crystallization, chemical scale accumulation, and severe fluid drag forces.
- Universal Flange Integration: Mating flanges are drilled in strict compliance with global specifications including ANSI/ASME B16.5, DIN, BS, EN1092, and JIS, using Carbon Steel Q235 or Stainless Steel 304/316.
Technical Properties & Operating Limits
| Technical Parameter | Engineering Specification |
|---|---|
| Product Identification | PTFE Lined Rubber Expansion Joint (Teflon Lined Flexible Connector) |
| Lining Compound Options | Virgin PTFE (F4), FEP (F46), Food-Pharma Grade FDA Compliant Fluoropolymers |
| Design & Testing Standards | GB/T 26121, HG/T 20592, AWWA C219, ISO 9001 Certified Quality Control |
| Standard Pressure Classes | PN10 / PN16 | Class 150 (Custom heavy-duty pressure configurations engineered on request) |
| Thermal Tolerance Range | -30°C to +150°C (subject to external elastomeric backing selection) |
Standard Dimensions & Multi-Axis Movements
| Nominal Diameter | Install Length | Axial Movement (mm) | Lateral Movement | Angular Movement | ||
|---|---|---|---|---|---|---|
| mm (DN) | inch | Face-to-Face (mm) | Extension | Compression | Displacement (mm) | Deflection (α1+α2)° |
| 32 | 1.25 | 90 | 6 | 10 | — | — |
| 40 | 1.5 | 95 | 6 | 10 | — | — |
| 50 | 2 | 105 | 6 | 10 | 10 | 25° |
| 65 | 2.5 | 115 | 8 | 15 | 12 | 25° |
| 80 | 3 | 135 | 8 | 20 | 12 | 25° |
| 100 | 4 | 150 | 12 | 20 | 16 | 15° |
| 125 | 5 | 165 | 12 | 20 | 16 | 15° |
| 150 | 6 | 180 | 12 | 20 | 16 | 15° |
| 200 | 8 | 210 | 30 | 30 | 16 | 15° |
| 250 | 10 | 230 | 30 | 30 | 25 | 8° |
| 300 | 12 | 245 | 30 | 30 | 25 | 8° |
| 350 | 14 | 255 | 30 | 30 | 25 | 8° |
| 400 | 16 | 255 | 30 | 30 | 25 | 8° |
| 450 | 18 | 255 | 30 | 30 | 25 | 8° |
| 500 | 20 | 255 | 30 | 30 | 25 | 8° |
| 600 | 24 | 260 | 30 | 30 | 25 | 8° |
Engineering Note: Dimensional tolerances above follow general standard configurations. For industrial systems managing continuous negative pressure, specialized vacuum-resistant internal supporting rings can be dynamic-integrated into the design. Larger diameters exceeding DN600 are customizable upon precise technical drawings review.
Target Applications & Environments
DEVEL PTFE-lined corrosion-resistant connectors are heavily prioritized across advanced automated process sectors:
- Chemical & Acid Pickling Lines: Complete isolation against severe raw media transfer lines.
- Power Generation FGD Arrays: Integrated into high-velocity Flue Gas Desulfurization scrubbing units.
- Semiconductor & Electronics Facilities: Prevents fluid contamination within critical ultra-pure chemistry processing lines.
- Pharmaceutical & FDA Operations: Utilizes non-stick, hygienic properties of pure PTFE for clean industrial fluid movement.
Product Tags
PTFE Lined Expansion Joint
Teflon Lined Connector
Chemical Resistant
Acid Resistant
FEP Lined
Corrosion Resistant
Fluoropolymer Liner
Pickling Line
FGD System
Semiconductor
Pharmaceutical
Mining Slurry
DN32-DN600
FDA Compliant
Teflon Lined Connector
Chemical Resistant
Acid Resistant
FEP Lined
Corrosion Resistant
Fluoropolymer Liner
Pickling Line
FGD System
Semiconductor
Pharmaceutical
Mining Slurry
DN32-DN600
FDA Compliant
Need a custom specification or have questions? Contact Henan Devel Fluid Equipment Co., Ltd. for factory-direct pricing, technical datasheets, and application engineering support.
