Common feature of all bellows mechanical seals is an elastomer or metallic bellows as dynamic sealing element. Mechanical seals of this type are insensitive to contamination and deposits. The metallic bellows serves in addition as a spring to close the sliding faces.

Elastomer bellows mechanical seal

Rotating mechanical seal with multiple spring not in contact with the product, mounted on the outside

Rotating rubber bellows mechanical seal with single spring not in contact with the product

Stationary rubber bellows mechanical seal with single spring in contact with the product 

Stationary rubber bellows mechanical seal with single spring not in contact with the product

PTFE bellows mechanical seal

Rotating mechanical seal with multiple spring not in contact with the product, mounted on the outside

Metallic bellows mechanical seals are also well suited for high- and low-temperature service, provided the secondary seals are made of a suitable material, e.g. Statotherm

Metal bellows mechanical seal

Rotating bellows mechanical seal
 

Rotating bellows mechanical seal for use at high and low temperatures with secondary seals of pure graphite

Stationary bellows mechanical seal

Rotating roller bellows mechanical seal

Stationary roller bellows mechanical seal