John Crane 59U Mechanical Seal

1,Working Parameters

Temperature：-30~260℃

Pressure：≤1.2MPa

Speed：≤15m/s

2,Materials

Static ring：V1,Q1,Q2,Q3,U1,U2,A,B

Dynamic ring：Q1,Q2,Q3,U1,U2,A,B

Sealing ring：V,P,E,M1,K

Springs and structural parts：F,G,G1,M

3,Applicable media: Any working conditions are acceptable. This mechanical seal uses a PTFE wedge ring that is resistant to most chemicals.

4,Description: This mechanical seal is an unbalanced compact multi-spring structure design. It can solve the problem of small transmission and compensation force. It is a perfect replacement for John Crane 59U mechanical seal.

The principle of this mechanical seal is that after the shaft rotates, the spring seat is driven to rotate through the set screw, and the several protruding R on the spring seat plays a transmission role to drive the rotation of the moving ring. There is also a snap ring groove in front of the moving ring. After the snap ring is installed, the moving group is a whole, which is easier to install on the equipment. The moving ring is a whole sealing material. This design reduces the leakage point of the seal. The seal between the shaft and the moving ring is maintained by the interference of the PTFE wedge ring. There is a gasket between the moving ring and the spring, which can make the thrust of the spring more uniform and block the PTFE wedge ring, providing thrust for PTFE to make the PTFE seal more reliable. Multiple small springs provide the initial sealing of the mechanical seal and the compensation of the moving ring during use. Multiple small springs can make the moving ring evenly stressed, thereby increasing the service life of the mechanical seal. The static ring is ensured by the interference of the PTFE rectangular ring to ensure the sealing, and the friction of the PTFE rectangular ring to ensure the static ring. The static ring seat has an anti-rotation pin, which can better fix the static ring so that the static ring will not slip.

5,Our company has a strong design and development team, which can recommend and customize mechanical seal products that are more suitable for you according to different customer needs.

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