Elastomer Bellow - NES type 14

NES type 14

NES 14 Mechanical Elastomer Bellow Seal - equivalent to John Crane type 21, Type 51, Type 502, Sealol 43
=} Crane 21, 51, 521, Sealol 43

Operating Conditions:

Pressure: Up to 10 kg/cm2
Temperature: -20 C ~ 180 C

Materials:

Face: Carbon, SiC, TC
Seat: Ceramic, SiC, TC
Elastomer: NBR, EPDM, Viton
Metal: 304SS, 316SS

Cross Specification Chart

Cross Specification Chart for NES 14 mechanical seal equivalent to John Crane type 21, type 51, sealol 43
 

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NESEAL Request for Price Quote for Mechanical Seals

 

Additional Notes:

General purpose seal, widely used in centrifugal, hydraulic, rotary and turbine pumps, compressors, mixer, and other rotary shaft equipment.

Standard Seat Compatibility:

NES V mechanical seal seat is equivalent to Vulcan 43 / Eagle 43

NES V is equivalent to Vulcan 43 / Eagle 43

specification chart in Metric

Alternative Seat Compatibility:

NES E mechanical seal seat is equivalent to Burgmann G606

NES E is equivalent to Burgmann G606

specification chart in Metric

NES J mechanical seal seat is equivalent to Burgmann G50

NES J is Burgmann G50

specification chart in Metric

NES M mechanical seal seat is equivalent to DIN LONG

NES M is equivalent to DIN LONG

specification chart in Metric

NES N mechanical seal seat is equivalent to DIN SHORT

NES N is equivalent to DIN SHORT

specification chart in Metric

NES R mechanical seal seat is equivalent to John Crane M

NES R is equivalent to John Crane M

specification chart in Metric
 
"Non-Pusher" Elastomer Bellows Seal

An elastomer bellows seals is a non-pusher seal design in which a single spring coil fits over the shaft and bellows. The elastomer bellows requires a concentric spring; the metal bellows does not because the bellows itself provides the pressure necessary to hold the seal faces in contact.

Fits equipment with confined space requirements and limited seal chamber depths.

An elastomer bellows seal combines the best features of a bellows seal and a pusher seal, such as the absence of a dynamic gasket which eliminates the possibility of 'hang-up.'

The elastomer bellows is tolerant to abrasive particals or contamination. This is due to the features of the open shape and the 'self-cleaning action,' disposing of particles through centrifugal force.

One major benefit is the simplicity of the design and subseqent lower cost.

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