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Metal Bellows Seals
for General and Chemical Service
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Metal Bellows seals can seal with Flexible Graphite instead of a rubber boot or o-ring
Elastomers allowing it to be used in higher temperature applications
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No Springs to clog !!!!!
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Metal Bellows seals are a very effective method of maintaining seal face pressure on the seal face.
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Metal Bellows seals that do use o-rings only require
one static o-ring to seal off any leakage along the shaft in
Chemical Service this o-ring will be PTFE.
| Seal Dash Number |
"A" Shaft size
.000
-.002 |
B REF |
C ±.030 |
D REF |
E REF |
| -16 |
1" |
1.562 |
1.25 |
1.438 |
1.235 |
| -18 |
1.125" |
1.687 |
1.25 |
1.565 |
1.362 |
| -20 |
1.25" |
1.812 |
1.312 |
1.719 |
1.516 |
| -22 |
1.375" |
1.937 |
1.437 |
1.845 |
1.641 |
| -24 |
1.5" |
2.062 |
1.437 |
1.97 |
1.716 |
| -26 |
1.625" |
2.187 |
1.437 |
2.095 |
1.841 |
| -28 |
1.75" |
2.312 |
1.437 |
2.22 |
1.966 |
| -30 |
1.875" |
2.437 |
1.5 |
2.345 |
2.09 |
| -32 |
2" |
2.562 |
1.5 |
2.471 |
2.216 |
| -34 |
2.125" |
2.687 |
1.5 |
2.595 |
2.34 |
| -36 |
2.25" |
2.812 |
1.562 |
2.721 |
2.466 |
| -38 |
2.375" |
2.937 |
1.562 |
2.846 |
2.59 |
| -40 |
2.5" |
3.187 |
1.562 |
3.096 |
2.79 |
| -42 |
2.625" |
3.312 |
1.625 |
3.221 |
2.915 |
| -44 |
2.75" |
3.437 |
1.625 |
3.347 |
3.04 |
| -46 |
2.875" |
3.625 |
1.844 |
3.502 |
3.201 |
| -48 |
3" |
3.75 |
1.844 |
3.727 |
3.327 |
| -50 |
3.125" |
3.875 |
1.909 |
3.772 |
3.442 |
| -52 |
3.25" |
4 |
1.909 |
3.897 |
3.567 |
| -54 |
3.375" |
4.125 |
1.909 |
4.022 |
3.629 |
| -56 |
3.5" |
4.25 |
2.052 |
4.147 |
3.817 |
| -58 |
3.625" |
4.375 |
2.052 |
4.272 |
3.942 |
| -60 |
3.75" |
4.5 |
2.072 |
4.397 |
4.067 |
| -62 |
3.875" |
4.625 |
2.072 |
4.522 |
4.192 |
An alternative to using PTFE wedge multi-spring seals is a metal
bellows seal with a singluar o-ring. Because the o-ring is static it will
not wear on the shaft. When installed correctly metal bellows seals will
provide exceptionally long service. Metal bellows seals are and excellent
solution on chemical applications where Kalrez, Chemrez,Viton, FKM, Buna,
Aflas or EPDM are not compatible.
For many years an inexpensive form
of metal bellows seals have been used very successfully in the waste water
/ sewage industry and in the agricultural fields pumping irrigation
water. These seals were generally made of a formed bellows rather
than a welded bellows. Welded bellows seals are much stronger and
have superior flex and recovery characteristics which are more ideal to
holding seal faces together but cost more to manufacture. Welded
metal bellows seals are less prone to metal fatigue and are available in
single and double ply.
American Seal & Packing has negotiated the production of welded
metal seals made for us at a cost similar to formed bellows. As a
result we can offer welded metal seals that will last longer in the field
resulting in less pump down time, less loss production and fewer labor
costs, saving you incalculably.
Of course none of this would be attainable if the quality system was
not insuring consistent, repeatable, quality. Manufactured under an
ISO-90001 system, maintaining the quality of the materials, and
workmanship. On receipt of the product the seals are re-inspected, labeled
and packaged.
At some point any seal will wear. American Seal & Packing
also does seal repairs. To assure you always get your seal back regardless
of who does your seal repair, we recommend having your new seals laser
etched when you order them new. At the time of your order just
indicate how you would like your seal marked.
We offer both
1) General to sever application elastomerically sealed metal bellows
seals.
2) High temperature seals for over 500 F applications.
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