Mechanical Seals
Teflon Bellow
Externally mounted PTFE bellows seal engineered for extremely corrosive acids.
Specialized chemical seal constructed with a machined virgin PTFE bellows and external clamping assembly. Designed for highly aggressive mineral acids, halogens, and solvents where metallic springs cannot contact the liquid.
Product photo · Teflon Bellow
Specifications
Technical profile
- Design
- Externally mounted, PTFE bellows, multi-spring external clamp
- Wetted parts
- 100% Virgin PTFE / Glass-filled PTFE / SiC / Ceramic
- Shaft size
- 18 mm to 100 mm
- Face materials
- High-purity Ceramic / Silicon Carbide / Glass-filled PTFE
- Pressure rating
- Up to 5 bar (external mount)
- Temperature
- -20 °C to +120 °C
- Metal parts
- Alloy 20 / Hastelloy-C external clamping ring (non-wetted)
Specifications are typical and vary by variant. Share your duty conditions for an exact recommendation.
Key benefits
Why this product
- Total chemical inertness against concentrated H2SO4, HNO3, HCl, and solvents
- External mounting keeps all metal springs and clamps safely outside the media
- Eliminates expensive exotic alloy shafts by sealing on standard glass-lined or alloy sleeves
- Rapid external installation without dismantling pump casing
Applications
Typical industries
ChemicalDye ManufacturingPharma
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Need this teflon bellow for your line?
Share your duty conditions and drawings — our team responds with a technical recommendation and a firm quote.