The PTFE Bellows Chemical Pump Seal is a mechanical seal designed for aggressive chemical service. It features a welded PTFE bellows assembly that functions as both the secondary seal and the axial flexibility component. This design eliminates the need for elastomers, providing compatibility with highly corrosive and high-purity fluids.
Our Jiaxing Burgmann seals are high-qualified due to we strictly follow the DIN24960, ISO3069, EN12756, API628 standards.
| Parameter | Range |
|---|---|
| Shaft Diameter | 30~100mm |
| Pressure | 0.5Mpa |
| Temperature | -10~100°C |
| Sliding Velocity | 15m/s |
| Component | Materials |
|---|---|
| Rotary Ring | Car / SIC / TC / Cer |
| O-Ring | EPDM, NBR, AFLAS, Kalrez |
| Spring and Metal Parts | SUS304 / SUS316, Titan, 904l |
| Stationary Ring | Car / SIC / TC / Cer |
Port of Loading: Shanghai
Shipping Method: DHL, UPS, FEDEX, TNT, etc
Payment Terms: T/T, Western Union, Money Gram
A1: This seal features a welded PTFE bellows that serves as both the secondary seal and the axial flexibility mechanism. This design eliminates the need for elastomeric components, providing complete chemical resistance. The construction typically includes high-grade PTFE for the bellows and advanced ceramic or silicon carbide for the sealing faces.
A2: It is specifically engineered for handling aggressive chemicals across various industries, including chemical processing, pharmaceutical manufacturing, semiconductor production, and wastewater treatment. Typical applications involve acids, solvents, caustics, and other corrosive media where elastomer compatibility is limited.
A3: Standard operational parameters typically include temperature ratings from -50°C to 180°C, pressure capabilities up to 1.6 MPa, and maximum surface speeds of 20 m/s. Specific limits may vary based on seal configuration and material combinations.
A4: PTFE offers exceptional resistance to virtually all chemicals, including strong acids, bases, and solvents. It maintains stability across a wide temperature range and exhibits low friction characteristics. The material's non-stick properties also help prevent clogging and material buildup in demanding applications.
A5: The one-piece welded PTFE bellows eliminates potential failure points associated with elastomeric secondary seals. This monolithic construction ensures reliable performance when handling aggressive chemicals, high-purity fluids, and applications where minimal product contamination is critical.
A6: Common sealing face materials include reaction-bonded silicon carbide, sintered silicon carbide, alumina ceramic, and premium-grade carbon. Selection depends on specific chemical compatibility requirements, abrasion resistance needs, and operational parameters such as temperature and pressure.
A7: External mounting simplifies installation and inspection procedures while allowing for operation in limited space applications. This configuration facilitates easier maintenance and provides better heat dissipation compared to internally mounted seals.