Mechanical Seals
Metal Bellow
Edge-welded metal bellows seal for high-temperature heat transfer oils and hydrocarbons.
High-performance mechanical seal featuring an edge-welded metal bellows that acts as both spring element and secondary sealing barrier. Eliminates elastomer O-ring temperature limits, excelling in hot oil, refinery, and cryogenic service.
Product photo · Metal Bellow
Specifications
Technical profile
- Design
- Edge-welded metal bellows, non-pusher, balanced
- Bellows material
- Alloy 718 (Inconel) / Hastelloy-C / AM350
- Shaft size
- 19 mm to 100 mm
- Face materials
- Silicon Carbide / Tungsten Carbide / Premium Carbon
- Secondary seal
- Flexible Graphite (Grafoil) rings — zero elastomer
- Pressure rating
- Up to 25 bar
- Temperature
- -75 °C to +400 °C (with graphite secondary)
Specifications are typical and vary by variant. Share your duty conditions for an exact recommendation.
Key benefits
Why this product
- Operates at extreme temperatures up to 400 °C without elastomer degradation
- Self-cleaning welded bellows design prevents clogging and coking in hot oil
- Eliminates O-ring hang-up and shaft fretting in high-vibration refinery pumps
- Hydraulically balanced for high-pressure hydrocarbon and boiler feed duty
Applications
Typical industries
Oil & GasChemicalPlastics
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Need this metal bellow for your line?
Share your duty conditions and drawings — our team responds with a technical recommendation and a firm quote.