Is the Stainless Steel TW Coupling DIN 28450 with BSP Male Thread, Type MK suitable for transferring food-grade liquids and beverages?

Yes — the Stainless Steel TW Coupling DIN 28450 with BSP Male Thread, Type MK is suitable for transferring food-grade liquids and beverages, with some qualifications. Why it’s suitable: - Material: Made from AISI 316 stainless steel, which is widely used in food and beverage applications due to excellent corrosion resistance and hygienic properties. - Sealing options: Uses PTFE (Teflon) seals for thread sealing (seal type GD). PTFE is chemically inert, food-compatible, and withstands a wide range of temperatures and media. - Operating range: Rated for pressures from -0.8 bar to 16 bar and temperatures from -20°C to +65°C, covering most food and beverage transfer conditions. - Standard compliance: Designed to EN ISO 14420-6 (formerly DIN 28450), a recognized industrial standard for hygiene and safety in transfer connections. Notes and cautions: - Hypalon (GSD) seals are not food-grade; if the specific assembly uses hypalon seals (used for joint sealing in 4" type TWO), those would be unsuitable for food contact. Confirm the coupling uses PTFE (GD) seals for food applications. - Ensure all seal materials, surface finish, and any lubricants or coatings used are certified for food contact per relevant local regulations (e.g., EU 1935/2004, FDA 21 CFR). - Validate compatibility with the specific food product (e.g., high-acid, alcoholic, fatty) and process conditions (cleaning, CIP/SIP) before use. Conclusion: With AISI 316 construction and PTFE (GD) seals, the Stainless Steel TW Coupling DIN 28450 with BSP Male Thread, Type MK is appropriate for food-grade liquids and beverages, provided hypalon is avoided and all components and certifications meet applicable food-contact regulations.

Can the Stainless Steel TW Coupling DIN 28450 with BSP Male Thread, Type MK be used with aggressive chemicals or solvents, and which seal materials are recommended for such applications?

Stainless Steel TW Coupling DIN 28450 with BSP Male Thread, Type MK can be used with many aggressive chemicals and solvents thanks to its AISI 316 stainless steel construction, which offers very good corrosion resistance. Final compatibility depends on the specific chemical, its concentration, temperature and pressure, and whether vapors or liquefied gases are involved (these are excluded). For aggressive chemicals and solvents, choose seals that resist swelling, degradation and chemical attack: - PTFE (Teflon, seal type GD) — excellent broad-spectrum chemical resistance, suitable for most aggressive acids, alkalis and solvents; limited elasticity so not ideal where high dynamic sealing or large misalignment occurs. - Hypalon (seal type GSD) — good resistance to many solvents and chemicals, ozone and weathering; better elasticity than PTFE but not as chemically resistant to strong oxidizers. Recommendation: use PTFE (GD) seals for maximum chemical compatibility; consider hypalon (GSD) where improved elasticity is needed and the specific solvent is compatible. Always verify compatibility with the particular chemical, its temperature/concentration and operating pressure, and run supplier compatibility charts or tests for critical applications.

Coupling TW DIN 28450 with a female BSP thread, steel stainless, type MK

Additional information

Material	SS – stainless steel

Socket coupling reloading TW type MK with thread internal BSP. Made in accordance with the EN ISO 14420-6 standard (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 (should take into account medium and Material seal). sealing coupling (type the gasket GSD, for 4″ type TWO): hypalon. sealing thread (type the gasket GD): teflon.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TW-MK-050-SS	Coupling MK50 (TW 1502) with 2" BSP female, AISI 316	-	16	In stock	Enquiry
TW-MK-050-SSR	Coupling MK50 (TW 1502) with 2" BSP female, AISI 316	-	16	In stock	Enquiry
TW-MK-080-SS	Coupling MK80 (TW 502) with 3" BSP female, AISI 316	-	16	In stock	Enquiry
TW-MK-080-SSR	Coupling MK80 (TW 502) with 3" BSP female, AISI 316	-	16	In stock	Enquiry
TW-MK-100-SS	Coupling MK100 with 4" BSP female, AISI 316	-	16	In stock	Enquiry
TW-MK-100-SSR	Coupling MK100 with 4" BSP female, AISI 316	-	16	In stock	Enquiry

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Socket coupling reloading TW type MK with thread internal BSP. Made in accordance with the EN ISO 14420-6 standard (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 (should take into account medium and Material seal). sealing coupling (type the gasket GSD, for 4″ type TWO): hypalon. sealing thread (type the gasket GD): teflon.