SMS Seals (SS 1149)
SMS seals are square section rings typically used in SMS (Swedish Metric Standard) sanitary unions. The union assembly consists of an internally threaded nut, liner and externally threaded male part. The elastomer SMS seal is captive, located in a groove within the male part of the union assembly. This design provides a smooth, crevice-free internal bore. SMS seals are ideal for applications that do not demand constant disassembly of pipes/hoses.
SMS seals are available in lipped and unlipped profiles, in EPDM and FKM material grades that have been certified to FDA and 3-A standards. Metal detectable elastomers are also available from our Detectaseal® range.
How can we help? Contact us to discuss your SMS seal needs.
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Elastomer Materials Range
SMS seals are available in the following elastomer materials:
PPE Material Material Type Color Temp Range °C FDA USP 3A 18-03 Metal Detectable Perlast® G74S FFKM White -15 to +260 A-F 87+88 Class I No V70SW FKM White -10 to +200 A-F 87+88 Class I No Detectaseal XE7A EPDM Blue -40 to +150 A-F -- -- Yes Detectaseal XS7H Silicone (VMQ) Black -60 to +200 A-F 88 -- Yes All the above materials are free from animal derived ingredients and are compliant with EC1935 and EC2023 regulations.
FDA, USP and 3A 18-03 certificates and material datasheets are available to download in the Engineer's Hub.
| DN Size | Outer Diameter (mm) | Inner Diameter (mm) | Height (mm) |
| 25 | 32.0 | 25.0 | 5.5 |
| 32 | 40.0 | 32.0 | 5.5 |
| 38 | 48.0 | 38.0 | 5.5 |
| 51 | 61.0 | 51.0 | 5.5 |
| 63.5 | 73.5 | 63.5 | 5.5 |
| 76 | 86.0 | 76.0 | 5.5 |
| 89 | 101.0 | 89.0 | 5.5 |
| 108 | 120.0 | 108.0 | 5.5 |
| DN Size | Outer Diameter (mm) | Inner Diameter (mm) | Height (mm) |
| 25 | 32.0 | 22.5 | 5.5 |
| 38 | 48.0 | 35.5 | 5.5 |
| 51 | 61.0 | 48.5 | 5.5 |
| 63.5 | 73.5 | 60.5 | 5.5 |
| 76 | 86.0 | 72.9 | 5.5 |
| 101.6 | 113.5 | 100.0 | 5.5 |