Is the Stainless Steel Locking Ring for TW Coupling DIN 28450, Type MKH suitable for transferring food-grade liquids and corrosive chemicals?

Yes — the Stainless Steel Locking Ring for TW Coupling DIN 28450, Type MKH is suitable for transferring food-grade liquids and many corrosive chemicals, with some important caveats. Why it’s suitable: - Material: Made from high-grade AISI 316 stainless steel, which offers excellent corrosion resistance and is commonly used in food and chemical processing. - Standards and design: Manufactured to EN ISO 14420-6 (formerly DIN 28450) and intended for safe transfer of liquids and gases (excluding liquefied gases and vapors). - Operating range: Rated for pressures from -0.8 to 16 bar and temperatures between -20°C and +65°C, matching typical conditions in many food and chemical applications. Caveats: - Food safety: The ring material is appropriate, but full food-grade compliance for a system often requires confirmation of surface finish, traceability, and that accompanying seals (e.g., the MKV sealing ring) are made from food-approved elastomers. Verify the complete assembly (locking ring + sealing ring + hoses) meets relevant food-contact regulations (e.g., FDA, EU 1935/2004) for your jurisdiction. - Chemical compatibility: AISI 316 resists many corrosive substances, but not all (strong chlorides, certain acids at high concentrations/temperatures, and some halogenated solvents can cause attack). Confirm compatibility with the specific chemical, concentration, temperature and exposure time. - Exclusions: Not suitable for liquefied gases and vapors per the specification. Recommendation: Use the Stainless Steel Locking Ring for TW Coupling DIN 28450, Type MKH in food and many chemical applications, but validate the complete coupling assembly and confirm chemical compatibility and regulatory food-contact compliance for your specific use case.

Can the Stainless Steel Locking Ring for TW Coupling DIN 28450, Type MKH be used with aggressive chemical vapors or liquefied gases?

No. The Stainless Steel Locking Ring for TW Coupling DIN 28450, Type MKH is explicitly intended for the safe transfer of liquids, bulk materials, and gases, but excluding liquefied gases and vapors. Although made of AISI 316 stainless steel with good corrosion resistance and rated for -0.8 to 16 bar and -20°C to +65°C, it is not specified or approved for use with aggressive chemical vapors or liquefied gases. For such media, select equipment specifically certified for chemical compatibility and cryogenic or pressurized liquefied service.

Ring closing for coupling TW DIN 28450, steel stainless, type MKH

Additional information

Material	SS – stainless steel

Ring closing MKH for fittings transfer TW. Do use with a sealing ring MKV. Together they molds an MK coupling. made in accordance with the standard EN ISO 14420-6 (formerly DIN 28450). intended for liquids, bulk materials and gases (with the exception liquefied gas and steam). Material: steel AISI 316. pressure: od -0.8 bar up to 16 bar. Operating temperature: od -20°C up to +65°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TW-MKH-050-SS	Ring closing TW 1503-4, AISI 316	-	16	In stock	Enquiry
TW-MKH-050-SSR	Ring closing TW 1503-4, AISI 316	-	16	In stock	Enquiry
TW-MKH-080-SS	Ring closing TW 503-4, AISI 316	-	16	In stock	Enquiry
TW-MKH-080-SSR	Ring closing TW 503-4, AISI 316	-	16	In stock	Enquiry

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Ring closing MKH for fittings transfer TW. Do use with a sealing ring MKV. Together they molds an MK coupling. made in accordance with the standard EN ISO 14420-6 (formerly DIN 28450). intended for liquids, bulk materials and gases (with the exception liquefied gas and steam). Material: steel AISI 316. pressure: od -0.8 bar up to 16 bar. Operating temperature: od -20°C up to +65°C.