Silicone gasket SMS Union

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Product overview
Ami Polymer SMS Union Gaskets are hygienic SMS (Swedish Metric Standard) union seals for sanitary pipeline connections. The assembly comprises a male weld ferrule with a square groove for the gasket, a female liner weld ferrule, a round slotted nut and a square cross-section gasket seated in the male part. SMS unions provide a smooth, cavity-free internal bore when assembled and are identified by rounder threads on the male ferrule.

Applications

• Breweries
• Wineries
• Dairy processing
• Biotech facilities
• Food & Beverage production lines

Certifications

• FDA 21 CFR 177.2600
• USP Class VI
• NSF 51 (for Silicone)
• USFDA DMF #32561
• ADI free, TSE/BSE free, Melamine free

DIN sizes — SMS union gaskets

• DIN 25 — D2 32 mm | D1 25 mm | Height 5.5 mm
• DIN 32 — D2 40 mm | D1 32 mm | Height 5.5 mm
• DIN 38 — D2 48 mm | D1 38 mm | Height 5.5 mm
• DIN 51 — D2 61 mm | D1 51 mm | Height 5.5 mm
• DIN 63.5 — D2 73.5 mm | D1 63.5 mm | Height 5.5 mm
• DIN 76 — D2 86 mm | D1 76 mm | Height 5.5 mm
• DIN 89 — D2 101 mm | D1 89 mm | Height 5.5 mm
• DIN 108 — D2 120 mm | D1 108 mm | Height 5.5 mm

DIN sizes — SMS lipped

• DIN 25 — D2 32 mm | D1 25.5 mm | Height 5.5 mm
• DIN 38 — D2 48 mm | D1 35.5 mm | Height 5.5 mm
• DIN 51 — D2 61 mm | D1 48.5 mm | Height 5.5 mm
• DIN 63.5 — D2 73.5 mm | D1 60.5 mm | Height 5.5 mm
• DIN 76 — D2 86 mm | D1 72.9 mm | Height 5.5 mm
• DIN 101.6 — D2 113.5 mm | D1 100 mm | Height 5.5 mm

Physical properties (summary)

• EPDM — Shore A 40–90; Tensile 500–2,500 PSI; Elongation 100–700%; Temperature -60 to 260 °C
• FKM — Shore A 60–90; Tensile 500–2,000 PSI; Elongation 150–350%; Temperature -25 to 400 °C
• CR — Shore A 40–90; Tensile 500–3,000 PSI; Elongation 100–800%; Temperature -45 to 260 °C
• NBR — Shore A 40–90; Tensile 200–3,500 PSI; Elongation 200–650%; Temperature -40 to 250 °C
• FFKM — Shore A 60–70; Tensile 1,450–2,900 PSI; Elongation 125–250%; Temperature -67 to 626 °C
• Silicone — Shore A 10–90; Tensile 200–1,500 PSI; Elongation 200–700%; Temperature -100 to 626 °C

Technical specifications

• Product: SMS union gasket assembly — male weld ferrule, female liner ferrule, slotted nut, square-section gasket
• Identification: rounder male threads; gasket seated in square recess; weld liner with flat face for smooth bore
• Materials: Silicone, EPDM, CR, NBR, FKM, FFKM; metal-detectable options available
• Typical applications: breweries, wineries, dairy, biotech, food & beverage
• Standards: FDA 21 CFR 177.2600; USP Class VI; NSF 51 (Silicone); USFDA DMF #32561
• Available DIN sizes: 25–108 (gasket height typically 5.5 mm)
• Supplier: Ami Polymer (Ami Polymer Pvt. Ltd.)