Elastomer Bellow - NES type 2

NES type 2

NES 2 Mechanical Elastomer Bellow Seal - equivalent to John Crane type 2
= John Crane 2

Operating Conditions:

Pressure: 10 kg/cm2
Temperature: -20 C ~ 180 C
Speed: Up to 13 m/s

Materials:

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

Cross Specification Chart

Cross Specification Chart for NES 2 mechanical seal equivalent to John Crane type 2Cross Specification Chart for NES 2 mechanical seal equivalent to John Crane type 2
 

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Addtional Notes:

General purpose seal for use in pumps, mixers, blenders, agitators, refrigeration compressors, blowers, fans and other rotary shaft equipment.

Suitable for a wide range of service conditions: from water and steam to chemicals and corrosive materials. Widely used in pulp and paper, petrochemical, food processing, wastewater treatment, chemical processing, power generation and other demanding applications.

Elastomer Bellow Seal
Balanced
Single spring  
Bi-directional  
Inside mounted

"Non-Pusher" seal equivalent to John Crane Type 1 Elastomer Bellows Seal. 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.

Standard Seat Compatibility:

NES U mechanical seal seat is equivalent to John Crane WM

NES U is equivalent to John Crane WM

specification chart in Inches

Alternative Seat Compatibility:

NES S mechanical seal seat is equivalent to John Crane NG

NES S is equivalent to John Crane NG

specification chart in Inches

NES T mechanical seal seat is equivalent to John Crane WG

NES T is equivalent to John Crane WG

specification chart in Inches
 
"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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