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METAL BELLOWS MECHANICAL SEALS

Metal bellows seals

High-performance metal bellows seals and solutions for extreme conditions.

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The Type 2874HTC metal bellows

OVERVIEW

What are metal bellows seals?

Metal bellows seals are a type of mechanical seal that use flexible, corrugated metal components to create a barrier to minimise leakage.

These seals eliminate the need for the dynamic elastomer, making them ideal for extreme temperatures, aggressive chemicals or vacuum environments alongside metal bellows expansion joints.

Their robust construction, as seen in welded metal bellows, makes them a preferred choice for high-performance industrial sealing applications.

Metal Bellows Type606 800X600

IN MORE DETAIL

What are metal bellows seals used for?

John Crane's metal bellows mechanical seals support various rotating equipment.

This includes:

  • Pumps
  • Compressors
  • Vessels
  • Mixers
  • Agitators

Available in edge-welded and formed designs, our metal bellows seals are trusted by demanding industries such as oil and gas, petrochemical, chemical, refrigeration compressor, pharmaceutical and food processing.

These seals are essential in environments requiring long-term durability, leak prevention and resistance to extreme conditions.

Whether you require flexible metal bellows for:

  • thermal movement
  • metal bellows couplings for precision alignment
  • metal bellows capsules for controlled performance

Our seals deliver long-term durability, leak prevention and consistent operation under extreme conditions.

Metal Bellows Type606 Rgb 800X600

WHY JOHN CRANE?

Why choose our metal welded bellows and formed bellows?

Our metal bellows mechanical seals offer measurable advantages for operations seeking long-term efficiency and safety:

  • Reduced downtime and emissions: Our metal bellows mechanical seal technology is engineered to help minimise downtime and environmental impact.
  • Enhanced productivity: By increasing the mean time between repair (MTBR), our metal bellows mechanical seals can assist in increasing productivity and improving return on investment.
  • Cost-effective operations: We focus on reducing the total cost of ownership, life cycle costs, operational expenses and inventory requirements.
  • Elevated safety standards: We prioritise plant safety, and our metal bellows seals are designed to meet rigorous industry standards and requirements.

John Crane Performance Plus™

John Crane Performance Plus™ is our modular service framework, supported by the largest mechanical seal service network, with over 200 manufacturing, sales and service centres globally. That means we are where you need us, when you need us – empowering people, plant and performance.

More about our John Crane Performance Plus™ service solutions
FREQUENTLY ASKED QUESTIONS

Common questions

How do metal bellows work?

Metal bellows work by flexing their thin, corrugated metal walls to absorb movement, pressure changes or thermal expansion while maintaining a leak-tight seal. Their flexibility allows them to accommodate motion and return to their original shape.

How are metal bellows made?

Metal bellows are manufactured by either welding thin metal sheets together or forming a single metal tube through processes like hydroforming or electroforming. These methods create flexible, corrugated structures capable of handling pressure, temperature and movement.

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