Bellows seals
Teflon Bellow Seal
- Shaft16 to 80 mm
- Pressure5 bar (max)
- Temperature−20 to 90 °C
The Teflon (PTFE) Bellows Mechanical Seal is a highly specialized, externally mounted sealing solution engineered specifically for handling the most aggressive, highly corrosive chemicals. Unlike standard seals that use metal parts or rubber elastomers that dissolve under chemical attack, this seal features a core molded or machined PTFE (Teflon) bellows. The bellows functions as both the flexible sealing element and the spring-loading mechanism. Because it is mounted externally outside the pump stuffing box, all internal metal components (such as the clamping rings and springs) are completely isolated on the atmospheric side, keeping them 100% safe from acid and chemical degradation.
Generally used in
Acids, alkalis and extremely corrosive service.
| Seal faces | GFT / CFT / Ceramic / SiC |
|---|---|
| Secondary seals | PTFE / GFT |
| Metal parts | SS-316, SS-304, Alloy 20 |
| Shaft diameter | 16 to 80 mm |
|---|---|
| Pressure | 5 bar (max) |
| Temperature | −20 to 90 °C |
| Speed | 2900 rpm (max) |
Custom sizes and material combinations are made to your drawing. Confirm duty conditions with us before ordering.
Related seals
-
Bellows seals
Rubber Bellow Seal
Non-pusher, no shaft fretting
- Shaft
- 10 to 100 mm
- Pressure
- 8 bar (max)
- Temp
- −20 to 80 °C
-
Single spring pusher seals
Conical Spring Seal
Compact pusher seal
- Shaft
- 10 to 100 mm
- Pressure
- 7 bar
- Temp
- −20 to 140 °C
