Metal bellows seal type-680

Profile

Single seal

Balanced

Independent of direction of rotation

Metal bellows

John Crane 680 seal replacement

RS-680 series is widely used for high temperature and high viscosity medium. Its rotating O-ring has no compensational function so that the bellows can move without damp.

Operating limits

Specification: 16~200mm

Pressure: ≤2.5Mpa

(Double layer wave plate ≤5.0Mpa)

Temperature:-20℃~300℃

Linear speed: ≤15m/s

Axial movement: ±1.0mm

Combination of materials

Sealing face: Carbon, Silicon carbide, Tungsten carbide

Secondary sealing: NBR, FKM, EPDM, FFKM

Metal component: SS304, SS316, Hast.C, 4J42, Ti

Bellows: SS316, AM350, Hast.C, Alloy718