Is the Sealing ring for TW coupling DIN 28450, stainless steel, type MKV compatible with steam or liquefied gases?

Sealing ring for TW coupling DIN 28450, stainless steel, type MKV is not compatible with steam or liquefied gases. The product description states it is intended for liquids, bulk materials, and gases except liquefied gas and steam. Temperature and pressure limits (â0.8 to 16 bar, â20Â°C to +65Â°C depending on medium and seal material) and seal materials (hypalon for joint sealing, PTFE for thread sealing) further restrict use with steam and liquefied gases.

Can Sealing ring for TW coupling DIN 28450, stainless steel, type MKV be used with aggressive chemicals or solvents?

Sealing ring for TW coupling DIN 28450, stainless steel, type MKV can resist many chemicals thanks to its AISI 316 stainless steel construction, but chemical compatibility depends primarily on the seals used and service conditions. Joint seal type GSD uses hypalon (chlorosulfonated polyethylene) - good for oils, some solvents and acids, but poor with strong oxidizers, ketones, and aromatic hydrocarbons. Thread seal type GD uses PTFE (Teflon) - very chemically resistant to most solvents and aggressive chemicals. Operating limits: -20 Â°C to +65 Â°C and pressures -0.8 to 16 bar; avoid liquefied gas and steam. For aggressive chemicals confirm compatibility of hypalon (if GSD) or rely on PTFE (if GD) with your specific media, temperature and pressure; when in doubt consult manufacturer or provide media details for precise guidance.

Can Sealing ring for TW coupling DIN 28450, stainless steel, type MKV be used at temperatures below -20Â°C?

Sealing ring for TW coupling DIN 28450, stainless steel, type MKV cannot be guaranteed for use below -20Â°C. Specified operating temperature range is from -20Â°C to +65Â°C, âconsidering the medium and sealing material.â Below -20Â°C the behaviour of the sealing materials may change: hypalon (used for joint sealing GSD, 4" type TWO) and PTFE (teflon, used for thread sealing GD) can exhibit reduced elasticity, increased brittleness or altered sealing performance at lower temperatures. Although AISI 316 stainless steel body will remain ductile at lower temperatures, the overall seal integrity depends on the elastomer/seat. Therefore do not use Sealing ring for TW coupling DIN 28450, stainless steel, type MKV below -20Â°C unless the manufacturer explicitly confirms suitability for the specific medium and temperature, or an alternative sealing material approved for the lower temperature is fitted.

Sealing ring for TW coupling DIN 28450, stainless steel, type MKV

Additional information

Material	SS – stainless steel

MKV sealing ring with BSP internal thread for TW transfer connections. To be used with MKH closing ring. Together they form the MK connection. Manufactured according to standard EN ISO 14420-6 (formerly DIN 28450). Intended for liquids, bulk materials, and gases (except liquefied gas and steam). Material: AISI 316 steel. Pressure: from -0.8 bar to 16 bar. Operating temperature: from -20°C to +65°C (considering the medium and sealing material). Joint sealing (seal type GSD, for 4″ type TWO): hypalon. Thread sealing (seal type GD): teflon.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TW-MKV-050-SS	Sealing ring TW 1502 with 2" BSP thread, AISI 316	-	16	In stock	Enquiry
TW-MKV-050-SSR	Sealing ring TW 1502 with 2" BSP thread, AISI 316	-	16	In stock	Enquiry
TW-MKV-080-SS	Sealing ring TW 502 with 3" BSP thread, AISI 316	-	16	In stock	Enquiry
TW-MKV-080-SSR	Sealing ring TW 502 with 3" BSP thread, AISI 316	-	16	In stock	Enquiry

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MKV sealing ring with BSP internal thread for TW transfer connections. To be used with MKH closing ring. Together they form the MK connection. Manufactured according to standard EN ISO 14420-6 (formerly DIN 28450). Intended for liquids, bulk materials, and gases (except liquefied gas and steam). Material: AISI 316 steel. Pressure: from -0.8 bar to 16 bar. Operating temperature: from -20°C to +65°C (considering the medium and sealing material). Joint sealing (seal type GSD, for 4″ type TWO): hypalon. Thread sealing (seal type GD): teflon.