ISO 21049 Pump shaft sealing systems
CurrentLatest edition found. Still confirm amendments with the publisher.
- Edition
- ISO 21049:2004
- Publisher
- ISO
- Part family
- Seals & O-rings
- Reviewed
- 23 October 2026 · source checked
Is ISO 21049 still current?
Yes. ISO 21049:2004 is the latest edition MechAtlas found (MechAtlas review: 23 October 2026). Check the publisher for amendments before you specify it.
What it covers
Pump shaft sealing systems
Equivalent and related standards
| Standard | Relationship | Note |
|---|---|---|
| API 682 3rd ed. | Identical adoption | historic |
| API 682 4th ed. 2014 | Similar purpose — not interchangeable without an engineering check |
“Similar” never means interchangeable without an engineering check.
Official source
MechAtlas does not reproduce standards. Check the official edition at the publisher's page for ISO 21049 or the ISO store.
Open in MechAtlasCheck a drawing callout
Other seals & o-rings standards
- DIN 3771-1 Replaced
Fluid systems - O-rings - dimensions - IS 5129 (Part 1) Replaced
Rotary shaft lip type seals - nominal dimensions and tolerances - IS 9975 (Part 1) Replaced
Specification for O-rings - dimensions - API 682 Current
Pump shaft sealing systems - ARPM OS-4 Current
Application guide for radial lip type shaft seals - DIN 3760 Current
Rotary shaft lip seals, types A/AS - DIN 3761 Current
Lip seals, automotive/heavy duty types - DIN ISO 3601-1 Current
O-rings - part 1 (ISO 3601-1:2012 + Amd 1:2019) - EN 12756 Current
Mechanical seal principal dimensions (ex DIN 24960) - IS 17891 Current
Fluid power systems - O-rings (parts 1 to 5) - IS/ISO 6194-1 Current
Rotary shaft lip seals - nominal dimensions and tolerances - ISO 3601-1 Current
O-ring sizes, tolerances, designation