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C65 Metal Bellows Mechanical Seal for John Crane Type 609 Replacement

C65 metal bellows mechanical seal is a balanced cartridge seal with independent rotation direction, suitable for high and low temperature and medium-to-high viscosity applications. It serves as a replacement for John Crane Type 609 and is widely used in chemical, oil, screw pump and other industrial equipment.

Operating Parameters:

Pressure:0~2.5Mpa
Temperature:-40℃~400℃

Line speed:≤25m/s

Shaft size:25~100mm

Materials:

Sealing ring:SSiC,SiC,Carbon,TC

Elastomers: Graphite

Springs: Inconel 718,HC-276

Metal Parts:410S,316L

 

C65 metal bellows mechanical seal features a single-end, balanced design with independent rotation direction. It uses a metal bellows and cartridge construction for reliable sealing and convenient installation. The auxiliary sealing ring uses expanded graphite, making the seal suitable for demanding operating conditions and mixed sealing media.

The cartridge design simplifies installation and adjustment while helping maintain consistent sealing performance. The metal bellows provides good flexibility and accommodates applications with high or low temperatures. C65 also performs well with medium-to-high viscosity fluids, where conventional spring seals may have a higher risk of clogging.

C65 is available as a replacement for John Crane Type 609 mechanical seals. It is widely used in chemical pumps, oil pumps, screw pumps and oil extraction equipment. Typical applications include chemical processing, oil refining, chemical fiber, food processing, pharmaceutical production, thermal power and papermaking.