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Component Seals
Bellows Seals
Bellows Seals are mechanical seals which use flexible bellows as secondary dynamic seals for their primary seal ring. This feature shows a distinctive advantage in extreme chemical or thermal conditions.
Ettem bellows seals are offered in cases where such conditions must be met.
Type 500R – Welded Metal Bellows Seals
- For extreme temperatures
- Inherently balanced internal Bellows seal
- No springs needed. Bellows provides for even load distribution
- Bellows acts as a flexible secondary seal without shaft fretting
- Flexible graphite static seal
- Large tolerance to axial and angular motions
Temperature Range
-75°C to 425°C
Pressure Range
Vacuum to 20 bar
Speed Range
0 to 25 m/sec
* Depending on Materials, Size and Operating Conditions
Type 520 – Stationary Welded Metal Bellows Seals
- Stationary seal for high speeds and larger misalignments
- For extreme temperatures
- Inherently balanced internal Bellows seal
- No springs needed. Bellows provides for even load distribution
- Bellows acts as a flexible secondary seal without shaft fretting
- Flexible graphite static seal
- Large tolerance to axial and angular motions
Temperature Range
-75°C to 425°C
Pressure Range
Vacuum to 20 bar
Speed Range
0 to 50 m/sec
* Depending on Materials, Size and Operating Conditions
Type 170/171 – PTFE Bellows Seals
- External Teflon® Bellows seal
- Process Shielded metal parts
- Glass-filled PTFE face for Type 170
- Silicon Carbide Face for Type 171
- Pre-set operating length with setting tabs in Imperial and Metric sizes
- Multi-coil spring design for even load distribution
- Large tolerance to axial and angular motions
Technical summery table*
Temperature Range
-50°C to 120°C
Pressure Range
Vacuum to 6 bar
Speed Range
0 to 10 m/sec
* Depending on Materials, Size and Operating Conditions
Type 500 – Welded Metal Bellows Seals
- Internal, inherently balanced Metal Bellows seal
- No springs needed. Bellows provides for even load distribution
- Bellows acts as a flexible secondary seal without shaft fretting
- Field-Interchangeable static seals
- Large tolerance to axial and angular motions
Technical summery table*
Temperature Range
-40°C to 300°C
Pressure Range
Vacuum to 20 bar
Speed Range
0 to 10 m/sec
* Depending on Materials, Size and Operating Conditions
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