NES 11b
(more info)
NES 11b Mechanical Pusher Seal - equivalent to Sealol 523, Sealol 524

Equivalent to Sealol 523, 524


Operating Conditions:

Pressure: Up to 12 kg/cm2
Temperature: -40 C ~ 230 C
Speed: Up to 16 m/s



Face: PTFE, Carbon, SiC, SSiC
Seat: Ceramic, SiC, SSiC
Metal: 304SS, 316SS
Spring: 316SS, Hastelloy C

Cross Specification Chart

Cross Specification Chart for NES 11b mechanical seal equivalent to Sealol 523, Sealol 524

Additional Notes:

External mounting seal with multi spring and flexible PTFE bellow. They can be used with extremely corrosive chemical compound.

Standard Seat Compatibility:

NES M mechanical seal seat

NES M is equivalent to DIN LONG

specification chart in Metric

Alternative Seat Compatibility:

NES N mechanical seal seat

NES N is equivalent to DIN SHORT

specification chart in Metric


NES D mechanical seal seat

NES D is equivalent to Burgman G60

specification chart in Metric


NES W mechanical seal

NES W is equivalent to John Crane* V

specification chart in Metric

specification chart in Inches


  * The John Crane and Flexibox trademarks are trademarks of their respective owners, and neither entity is affiliated with NE Seal Ind. Prod. LTD, its products, or its website, and does not manufacture, sponsor, or endorse its products.