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, which is 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.
SMS seal with unlipped profile
DN Size | OD (mm) | ID (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 |
SMS seal with lipped profile
DN Size | OD (mm) | ID (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 |
SMS seals are ideal for applications which don’t require constant disassembly of pipes and hoses.
Materials for SMS seals
SS 1140 seals are available in the following elastomer materials, and are certified to FDA, USP Class VI, and 3-A Sanitary Standards.
Perlast® G74S expand_more
Material Type: FFKM
Color: White
Temp Range (°C): -15 to +260
FDA: A-F
USP: 87+88
3A 18-03: Class I
Metal Detectable?: No
V70SW expand_more
Material Type: FKM
Color: White
Temp Range (°C): -15 to +200
FDA: A-F
USP: 87+88
3A 18-03: Class I
Metal Detectable?: No
Detectaseal® XE7A expand_more
Material Type: EPDM
Color: Blue
Temp Range (°C): -40 to +150
FDA: A-F
USP: —
3A 18-03: —
Metal Detectable?: Yes
Detectaseal® XS7H expand_more
Material Type: Silicone (VMQ)
Color: Black
Temp Range (°C): -60 to +200
FDA: A-F
USP: 88
3A 18-03: —
Metal Detectable?: Yes
All above materials are compliant with EC1935 and EC2023 regulations, and are free from animal-derived ingredients (ADI free).
FDA, USP, and 3A 18-03 certificates and material datasheets are available to download.
Our high performance sealing materials
SMS seals can be manufactured in the following material types:
Perlast
expand_moreThe ultimate perfluoroelastomers for sealing applications where chemical resistance and high temperature performance are critical.
Detectaseal®
expand_moreThe latest advance in contamination detection and containment, with metal-detectable and xray-detectable elastomers designed to meet the stringent demands of food and pharmaceutical processing industries.
View our range of high performance materials
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Resources and Tools header
Here are some of the key resources relating to this product, including videos, tools, and elastomer guides.
Please visit our Resources page for content on all PPE products, materials, and services.
PPE material grades selection tool
O-ring groove dimensions calculator
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