Can the Sealing ring for TW coupling DIN 28450, brass, type MKV be used with MKH closing ring for gases and liquids at 16 bar and -20Â°C to +65Â°C?

Yes. Sealing ring for TW coupling DIN 28450, brass, type MKV can be used with MKH closing ring for gases and liquids at 16 bar and -20Â°C to +65Â°C. The product description states they are designed to be used together as the MK connection, manufactured to EN ISO 14420-6 (formerly DIN 28450), intended for liquids, bulk materials and gases (excluding liquefied gas and steam). Material: brass. Pressure range: -0.8 bar to 16 bar. Operating temperature: -20Â°C to +65Â°C (subject to medium and sealing material). Sealing types: joint sealing (GSD) with NBR and thread sealing (GD) with polyurethane, suitable for the specified pressure and temperature ranges.

Is Sealing ring for TW coupling DIN 28450, brass, type MKV compatible with different sealing types (GSD/GD) for TW 4" connections?

Sealing ring for TW coupling DIN 28450, brass, type MKV is compatible with both sealing types for TW 4" connections: for joint sealing (seal type GSD, TWO 4") the MKV uses NBR; for thread sealing (seal type GD) it uses polyurethane. Thus MKV can be used with GSD (NBR) and GD (polyurethane) seals within the specified pressure (-0.8 to 16 bar) and temperature (-20Â°C to +65Â°C) limits.

Is Sealing ring for TW coupling DIN 28450, brass, type MKV suitable for use with MKH closing ring in food-grade applications?

Sealing ring for TW coupling DIN 28450, brass, type MKV: Based on the provided description, use with MKH closing ring forms the MK connection and the product is intended for liquids, bulk materials and gases (excluding liquefied gas and steam). Materials and seals: the body is brass; joint sealing for the 4" TWO type uses NBR; thread sealing uses polyurethane. Operating limits: pressure -0.8 to 16 bar, temperature -20Â°C to +65Â°C (dependent on medium and sealing material). Food-grade suitability: Brass, NBR and polyurethane can be used in some food-contact applications but not all grades are food-approved. The description does not state any food-grade or potable-water approvals (e.g., FDA, EU 1935/2004, NSF/ANSI 61, WRAS) nor specific hygienic surface finish. Therefore, based solely on the given data, Sealing ring for TW coupling DIN 28450, brass, type MKV cannot be confirmed as suitable for food-grade applications. To determine suitability you must obtain manufacturer documentation certifying food-contact compliance for the specific brass alloy and the exact NBR and polyurethane compounds used, plus any required approvals for your jurisdiction and the intended medium and temperature conditions.

Sealing ring for TW coupling DIN 28450, brass, type MKV

Additional information

Material	B – brass (bronze)

MKV sealing ring with BSP internal thread for TW loading 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: brass. 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): NBR. Thread sealing (seal type GD): polyurethane.

List of product variants

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

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MKV sealing ring with BSP internal thread for TW loading 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: brass. 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): NBR. Thread sealing (seal type GD): polyurethane.