Is the TW coupling DIN 28450 with GW BSP, stainless steel with E-CTFE lining, type MK suitable for handling hydrofluoric acid at 100Â°C?

TW coupling DIN 28450 with GW BSP, stainless steel with E-CTFE lining, type MK is generally suitable for handling hydrofluoric acid at 100Â°C. E-CTFE (ethylene-chlorotrifluoroethylene) offers very high chemical resistance across a wide temperature range (approx. â40Â°C to +130Â°C) and is noted as resistant to all acids, alkalis and aggressive media. The product description explicitly states it is used where AISI 316 stainless steel is insufficient, and its maximum service temperature exceeds 100Â°C, supporting compatibility. However, hydrofluoric acid is exceptionally aggressive and can attack some fluoropolymers under certain conditions (concentration, presence of catalysts, stress, and prolonged exposure). Therefore, final suitability must be confirmed by: 1) verifying HF concentration and contact duration, 2) consulting manufacturerâs specific chemical compatibility data for E-CTFE with the given HF concentration and temperature, and 3) ensuring mechanical/assembly factors (seals: hypalon or PTFE) are compatible with HF at 100Â°C. If manufacturer confirmation is obtained that E-CTFE and the listed seals are rated for the exact HF concentration and 100Â°C, the coupling can be used.

Can the TW coupling DIN 28450 with GW BSP, stainless steel with E-CTFE lining, type MK be used for long-term service with strong oxidizing acids at 120Â°C?

TW coupling DIN 28450 with GW BSP, stainless steel with E-CTFE lining, type MK Format can be used for long-term service with strong oxidizing acids at 120Â°C only with caution. E-CTFE lining offers excellent chemical resistance up to about +130Â°C and is resistant to strong acids, but long-term exposure to strong oxidizers at the upper temperature limit can accelerate degradation depending on acid type, concentration and oxidizing strength. Stainless steel body (AISI 316) may be insufficient against strong oxidizers. Recommend consulting the acidâs specific compatibility data (concentration, redox potential), performing manufacturer confirmation or compatibility tests, and considering higher-alloy metals or alternative linings if the acid is highly oxidizing at 120Â°C.

Can TW coupling DIN 28450 with GW BSP, stainless steel with E-CTFE lining, type MK be used for continuous service with strong bases at 130Â°C?

Yes. TW coupling DIN 28450 with GW BSP, stainless steel with E-CTFE lining, type MK can be used for continuous service with strong bases at 130Â°C. Reasoning: the product description states E-CTFE lining offers very high chemical resistance over approximately â40Â°C to +130Â°C and is resistant to all acids, alkalis and aggressive substances across pH 1â14. Where corrosion resistance of AISI 316 stainless steel is insufficient, the E-CTFE lining provides the necessary protection. Given the stated maximum temperature rating (â+130Â°C) and explicit resistance to strong bases, the coupling is suitable for continuous service with strong alkaline media at 130Â°C, provided that operating conditions (pressure, mechanical stress, compatibility of hypalon/Teflon seals if exposed to the media or temperature) match the product specifications and any relevant safety/installation guidelines.

Coupling TW DIN 28450 with female thread BSP, steel stainless with a lining E-CTFE, type MK

Additional information

Material	SS – stainless steel

Socket coupling reloading TW type MK with a thread internal BSP and with a lining E-CTFE. Made in accordance with the EN ISO 14420-6 standard (formerly DIN 28450). used for most aggressive chemical media, for which resistance corrosion steel acid-resistant AISI 316 is insufficient. E-CTFE is characterized very high chemical resistance in wide the scope temperatures (in approximation from -40°C to +130°C). is resistant na operation all acids, alkalis and other aggressive substances (Range pH 1 ÷ 14). has high properties mechanical, in particularly hardness and resistance na abrasion. Material: steel stainless. 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-SSE	Coupling MK50 (TW 1502) with 2" BSP female, AISI 316 / E-CTFE	-	16	In stock	Enquiry
TW-MK-080-SSE	Coupling MK80 (TW 502) with 3" BSP female, AISI 316 / E-CTFE	-	16	In stock	Enquiry
TW-MK-100-SSE	Coupling MK100 with 4" BSP female, AISI 316 / E-CTFE	-	16	In stock	Enquiry

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Socket coupling reloading TW type MK with a thread internal BSP and with a lining E-CTFE. Made in accordance with the EN ISO 14420-6 standard (formerly DIN 28450). used for most aggressive chemical media, for which resistance corrosion steel acid-resistant AISI 316 is insufficient. E-CTFE is characterized very high chemical resistance in wide the scope temperatures (in approximation from -40°C to +130°C). is resistant na operation all acids, alkalis and other aggressive substances (Range pH 1 ÷ 14). has high properties mechanical, in particularly hardness and resistance na abrasion. Material: steel stainless. sealing coupling (type the gasket GSD, for 4″ type TWO): hypalon. sealing thread (type the gasket GD): teflon.