ECLIPSE EVSR – O-RING OD CANTILEVER SPRING ENERGIZED SEAL
When considering a rotary service seal and additional gland diameter is available, an O-Ring OD Seal provides a level of anti-rotation and redundant sealing. The addition of an O-Ring on the OD of a radial seal creates a high friction interface at the bore to counteract rotary forces. Because the O-Ring is a lower durometer than the jacket material, it is more compliant and offers tight sealing on the bore. This feature is utilized in equipment such as vapor recovery and vacuum pumps where running friction needs to be low and sealing efficiency high.

Typical Range of Application
Pressure
Vacuum to 3,000 psi
[0 to 200 bar]
Temperature*
-320°F to 450°F
[-195°C to 230°C]
Ratings will vary based on materials and operating conditions
*Limited by O-Ring compound
Values and ratings in this catalog are based on industry standard applications operating under ideal conditions. The customer should assume responsiblity for validation testing of performance and suitabilty of Eclipse Engineering products. Eclipse Engineering accepts no liabilty for the accuracy and applicabilty of provided information.
STANDARD ORDERING EXAMPLE:
EVSR-R-548-LW-ET006-M-S-N
EVSR | = Seal Series | |
R | = Rod | |
548 | = Dash Number | |
LW | = Lip Style | |
ET006 | = Seal Material Code | |
M | = Spring Load L – Light M – Medium H – Heavy | |
S | = Spring Material S – Stainless Steel E – Elgiloy® H – Hastelloy® | |
N | = O-Ring Material N – Nitrile (NBR) F – Fluorocarbon (FKM) E – Ethylene Propylene (EPDM) |

NON-STANDARD ORDERING EXAMPLE:
EVSR-R-C-02953-LW-ET006-M-S-N
C
= Nominal Cross-Section
A = 1/4 in. (400 Series)
B = 5/16 in. (500 Series)
C = 3/8 in. (600 Series)
D = 7/16 in. (700 Series)
E = 1/2 in. (800 Series)
02953
Rod Diameter in 1000ths
Example: 02953 = Ø2.953 [75MM] Rod Diameter
EVSR STANDARD SEAL MATERIALS
Eclipse Material Code | Description | Color | Applications |
---|---|---|---|
ET000 | Virgin PTFE | White | Light Duty / Static / Cryogenics |
ET006 | Carbon filled PTFE | Black | General Purpose |
EU000 | Virgin UHMWPE | Translucent White | Viscous Media / Water |
ET014 | Polyimide filled PTFE | Orange/Brown | High Sealabilty / Soft Hardware |
See Eclipse Material Guide for complete list of available materials.
EVSR STANDARD SPRING MATERIALS
Eclipse Material Code | Spring Material | Application |
---|---|---|
S | 300 Series Stainless Steel | General purpose, standard spring material |
E | Elgiloy® | Improved performance and corrosion resistance; NACE approved |
H | Hastelloy® C276 | Maximum chemical/corrosion resistance |
STANDARD DASH NUMBERS
400 SERIES:
Gland tolerances | ||
---|---|---|
SEAL ID | ØA | ØB |
0.125 to 0.374 | +0.000
-0.001 |
± 0.001 |
0.375 to 2.999 | +0.000
-0.002 |
± 0.001 |
3.000 to 5.999 | +0.000
-0.003 |
± 0.0015 |
6.000 and up | +0.000
-0.004 |
± 0.002 |
400 Series Maximum Extrusion Gap (E), at 70° F | ||
---|---|---|
300 psi | 1500 psi | 3000 psi |
0.010 | 0.006 | 0.004 |
Consult Eclipse Engineering for all custom or unlisted sizes.

400 SERIES STANDARD DASH NUMBERS:
DASH # | A | B |
---|---|---|
404 | 0.250 | 0.750 |
405 | 0.313 | 0.813 |
406 | 0.375 | 0.875 |
407 | 0.438 | 0.938 |
408 | 0.500 | 1.000 |
409 | 0.563 | 1.063 |
410 | 0.625 | 1.125 |
411 | 0.688 | 1.188 |
412 | 0.750 | 1.250 |
413 | 0.813 | 1.313 |
414 | 0.875 | 1.375 |
415 | 0.938 | 1.438 |
416 | 1.000 | 1.500 |
417 | 1.063 | 1.563 |
418 | 1.125 | 1.625 |
419 | 1.188 | 1.688 |
420 | 1.250 | 1.750 |
421 | 1.313 | 1.813 |
422 | 1.375 | 1.875 |
423 | 1.438 | 1.938 |
424 | 1.500 | 2.000 |
425 | 1.563 | 2.063 |
426 | 1.625 | 2.125 |
427 | 1.688 | 2.188 |
428 | 1.750 | 2.250 |
429 | 1.813 | 2.313 |
430 | 1.875 | 2.375 |
431 | 1.938 | 2.438 |
432 | 2.000 | 2.500 |
433 | 2.063 | 2.563 |
434 | 2.125 | 2.625 |
435 | 2.188 | 2.688 |
Dash # | A | B |
---|---|---|
436 | 2.250 | 2.750 |
437 | 2.313 | 2.813 |
438 | 2.375 | 2.875 |
439 | 2.438 | 2.938 |
440 | 2.500 | 3.000 |
441 | 2.563 | 3.063 |
442 | 2.625 | 3.125 |
443 | 2.688 | 3.188 |
444 | 2.750 | 3.250 |
445 | 2.813 | 3.313 |
446 | 2.875 | 3.375 |
447 | 2.938 | 3.438 |
448 | 3.000 | 3.500 |
449 | 3.063 | 3.563 |
450 | 3.125 | 3.625 |
451 | 3.188 | 3.688 |
452 | 3.250 | 3.750 |
453 | 3.313 | 3.813 |
454 | 3.375 | 3.875 |
455 | 3.438 | 3.938 |
456 | 3.500 | 4.000 |
457 | 3.563 | 4.063 |
458 | 3.625 | 4.125 |
459 | 3.688 | 4.188 |
460 | 3.750 | 4.250 |
461 | 3.813 | 4.313 |
462 | 3.875 | 4.375 |
463 | 3.938 | 4.438 |
464 | 4.000 | 4.500 |
465 | 4.063 | 4.563 |
466 | 4.125 | 4.625 |
Consult Eclipse Engineering for all custom or unlisted sizes.
500 SERIES STANDARD DASH NUMBERS
Gland tolerances | ||
---|---|---|
SEAL ID | ØA | ØB |
0.125 to 0.374 | +0.000
-0.001 |
± 0.001 |
0.375 to 2.999 | +0.000
-0.002 |
± 0.001 |
3.000 to 5.999 | +0.000
-0.003 |
± 0.0015 |
6.000 and up | +0.000
-0.004 |
± 0.002 |
500 Series Maximum Extrusion Gap (E), at 70° F | ||
---|---|---|
300 psi | 1500 psi | 3000 psi |
0.014 | 0.008 | 0.006 |
Consult Eclipse Engineering for all custom or unlisted sizes.

500 SERIES STANDARD DASH NUMBERS:
DASH # | A | B |
---|---|---|
508 | 0.500 | 1.125 |
510 | 0.625 | 1.250 |
512 | 0.750 | 1.375 |
514 | 0.875 | 1.500 |
516 | 1.000 | 1.625 |
518 | 1.125 | 1.750 |
520 | 1.250 | 1.875 |
522 | 1.375 | 2.000 |
524 | 1.500 | 2.125 |
526 | 1.625 | 2.250 |
528 | 1.750 | 2.375 |
530 | 1.875 | 2.500 |
532 | 2.000 | 2.625 |
534 | 2.125 | 2.750 |
536 | 2.250 | 2.875 |
538 | 2.375 | 3.000 |
540 | 2.500 | 3.125 |
542 | 2.625 | 3.250 |
544 | 2.750 | 3.375 |
546 | 2.875 | 3.500 |
548 | 3.000 | 3.625 |
550 | 3.125 | 3.750 |
552 | 3.250 | 3.875 |
554 | 3.375 | 4.000 |
556 | 3.500 | 4.125 |
558 | 3.625 | 4.250 |
560 | 3.750 | 4.375 |
562 | 3.875 | 4.500 |
564 | 4.000 | 4.625 |
Consult Eclipse Engineering for all custom or unlisted sizes.
600 SERIES STANDARD DASH NUMBERS
Gland tolerances | ||
---|---|---|
SEAL ID | ØA | ØB |
0.125 to 0.374 | +0.000
-0.001 |
± 0.001 |
0.375 to 2.999 | +0.000
-0.002 |
± 0.001 |
3.000 to 5.999 | +0.000
-0.003 |
± 0.0015 |
6.000 and up | +0.000
-0.004 |
± 0.002 |
600 Series Maximum Extrusion Gap (E), at 70° F | ||
---|---|---|
300 psi | 1500 psi | 3000 psi |
0.014 | 0.008 | 0.006 |
Consult Eclipse Engineering for all custom or unlisted sizes.

600 SERIES STANDARD DASH NUMBERS:
DASH # | A | B |
---|---|---|
608 | 0.500 | 1.250 |
610 | 0.625 | 1.375 |
612 | 0.750 | 1.500 |
614 | 0.875 | 1.625 |
616 | 1.000 | 1.750 |
618 | 1.125 | 1.875 |
620 | 1.250 | 2.000 |
622 | 1.375 | 2.125 |
624 | 1.500 | 2.250 |
626 | 1.625 | 2.375 |
628 | 1.750 | 2.500 |
630 | 1.875 | 2.625 |
632 | 2.000 | 2.750 |
634 | 2.125 | 2.875 |
636 | 2.250 | 3.000 |
638 | 2.375 | 3.125 |
640 | 2.500 | 3.250 |
642 | 2.625 | 3.375 |
644 | 2.750 | 3.500 |
646 | 2.875 | 3.625 |
648 | 3.000 | 3.750 |
650 | 3.125 | 3.875 |
652 | 3.250 | 4.000 |
654 | 3.375 | 4.125 |
656 | 3.500 | 4.250 |
658 | 3.625 | 4.375 |
660 | 3.750 | 4.500 |
662 | 3.875 | 4.625 |
664 | 4.000 | 4.750 |
Consult Eclipse Engineering for all custom or unlisted sizes.
700 SERIES STANDARD DASH NUMBERS
Gland tolerances | ||
---|---|---|
SEAL ID | ØA | ØB |
0.125 to 0.374 | +0.000
-0.001 |
± 0.001 |
0.375 to 2.999 | +0.000
-0.002 |
± 0.001 |
3.000 to 5.999 | +0.000
-0.003 |
± 0.0015 |
6.000 and up | +0.000
-0.004 |
± 0.002 |
700 Series Maximum Extrusion Gap (E), at 70° F | ||
---|---|---|
300 psi | 1500 psi | 3000 psi |
0.020 | 0.010 | 0.008 |
Consult Eclipse Engineering for all custom or unlisted sizes.

700 SERIES STANDARD DASH NUMBERS
DASH # | A | B |
---|---|---|
712 | 0.750 | 1.625 |
714 | 0.875 | 1.750 |
716 | 1.000 | 1.875 |
718 | 1.125 | 2.000 |
720 | 1.250 | 2.125 |
722 | 1.375 | 2.250 |
724 | 1.500 | 2.375 |
726 | 1.625 | 2.500 |
728 | 1.750 | 2.625 |
730 | 1.875 | 2.750 |
732 | 2.000 | 2.875 |
734 | 2.125 | 3.000 |
736 | 2.250 | 3.125 |
738 | 2.375 | 3.250 |
740 | 2.500 | 3.375 |
742 | 2.625 | 3.500 |
744 | 2.750 | 3.625 |
746 | 2.875 | 3.750 |
748 | 3.000 | 3.875 |
750 | 3.125 | 4.000 |
752 | 3.250 | 4.125 |
754 | 3.375 | 4.250 |
756 | 3.500 | 4.375 |
758 | 3.625 | 4.500 |
760 | 3.750 | 4.625 |
762 | 3.875 | 4.750 |
764 | 4.000 | 4.875 |
Consult Eclipse Engineering for all custom or unlisted sizes.
800 SERIES STANDARD DASH NUMBERS
Gland tolerances | ||
---|---|---|
SEAL ID | ØA | ØB |
0.125 to 0.374 | +0.000
-0.001 |
± 0.001 |
0.375 to 2.999 | +0.000
-0.002 |
± 0.001 |
3.000 to 5.999 | +0.000
-0.003 |
± 0.0015 |
6.000 and up | +0.000
-0.004 |
± 0.002 |
800 Series Maximum Extrusion Gap (E), at 70° F | ||
---|---|---|
300 psi | 1500 psi | 3000 psi |
0.024 | 0.012 | 0.010 |
Consult Eclipse Engineering for all custom or unlisted sizes.

800 SERIES STANDARD DASH NUMBERS:
DASH # | A | B |
---|---|---|
820 | 1.250 | 2.250 |
822 | 1.375 | 2.375 |
824 | 1.500 | 2.500 |
826 | 1.625 | 2.625 |
828 | 1.750 | 2.750 |
830 | 1.875 | 2.875 |
832 | 2.000 | 3.000 |
834 | 2.125 | 3.125 |
836 | 2.250 | 3.250 |
838 | 2.375 | 3.375 |
840 | 2.500 | 3.500 |
842 | 2.625 | 3.625 |
844 | 2.750 | 3.750 |
846 | 2.875 | 3.875 |
848 | 3.000 | 4.000 |
850 | 3.125 | 4.125 |
852 | 3.250 | 4.250 |
854 | 3.375 | 4.375 |
856 | 3.500 | 4.500 |
858 | 3.625 | 4.625 |
860 | 3.750 | 4.750 |
862 | 3.875 | 4.875 |
864 | 4.000 | 5.000 |
Consult Eclipse Engineering for all custom or unlisted sizes.
HARDWARE DETAILS – SPLIT GLAND
Series | R
Radius MAX |
C1
Chamfer MIN |
C2
Chamfer MIN |
---|---|---|---|
000 | 0.010 | 0.010 | 0.031 |
100 | 0.015 | 0.015 | 0.050 |
200 | 0.015 | 0.015 | 0.062 |
300 | 0.015 | 0.020 | 0.093 |
400 | 0.020 | 0.020 | 0.125 |
Consult Eclipse Engineering for application/material specific design requirements or for use in solid or non-standard glands.


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