Is the TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type suitable for transferring food-grade liquids and which seals are recommended?

TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type is suitable for transferring food-grade liquids only if the materials in contact with the media meet food-contact regulations. The coupling body is brass (EN ISO 14420-6 / DIN 28450) and the standard integrated thread seal is polyurethane (seal type GD). Brass is commonly used in food applications but may contain trace lead unless specified as low‑lead or lead‑free; polyurethane can be food‑grade if formulated and certified as such. Recommended actions and seals: - Verify that the brass alloy is certified for food contact (e.g., EN 12164/12165 compliance or national food-contact approvals) or choose a certified lead‑free/food‑grade brass variant. - Use food‑grade seals: replace the standard polyurethane GD with seals certified for food contact such as EPDM (FDA or EU 10/2011 compliant), FKM/FPM (fluoroelastomer) food‑grade variants if high temperature/chemical resistance is needed, or food‑grade polyurethane if specifically certified. - Confirm the seal certification (FDA 21 CFR §177.2600, EU Regulation 10/2011, or equivalent) and the permitted temperature/pressure range for the selected seal. - Consider wetted‑part compatibility with your specific liquid (pH, solvents, fats) and operating conditions (-20°C to +65°C typical, may vary with seal choice). In summary: TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type can be used for food‑grade liquids provided the brass and the seal are explicitly food‑grade certified; recommended seals are certified EPDM, food‑grade FKM, or certified polyurethane depending on compatibility.

Can the TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type be used with steam or high-temperature vapors, and which seals tolerate such conditions?

No — the TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type is not suitable for steam or high‑temperature vapors. The product description explicitly excludes vapour (and liquefied gas) and states an operating temperature range of −20°C to +65°C, depending on the medium and sealing material. Steam and high‑temperature vapors exceed this temperature range and can degrade standard seals. Which seals tolerate steam/high temperatures: - PTFE (Teflon) seals — tolerate high temperatures and steam well (typically up to ~200–260°C depending on filler), good chemical resistance. - Graphite/metal‑reinforced seals — suitable for very high temperatures and steam, often used in steam service. - High‑temperature elastomers (e.g., FFKM/Viton at elevated grades) — can handle higher temperatures than standard PU or NBR but have lower limits than PTFE/graphite. Seals to avoid for steam: polyurethane (GD), standard NBR, and other low‑temperature elastomers — they harden, swell or fail under steam and temperatures above their rated range. If you need steam service, request a coupling and seal materials specifically rated for steam/high temperatures or retrofit the TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type only after confirming compatible high‑temperature seals and manufacturer approval.

TW Coupling DIN 28450 with BSP Male Thread, Brass, VK Type

Additional information

Material	B – brass (bronze)

The coupling plug for transfer coupling type VK with internal BSP thread is a reliable and durable solution designed for secure installation on hose ends or piping systems equipped with external BSP threads. Manufactured from high-quality brass in compliance with EN ISO 14420-6 (formerly DIN 28450), it ensures long-lasting performance and resistance to demanding working conditions. Suitable for the transfer of liquids, bulk materials, and gases (excluding liquefied gas and vapor), this component offers versatile application across various industries. With a pressure range from -0.8 bar up to 16 bar and an operating temperature spectrum from -20°C to +65°C, depending on the medium and sealing material, it guarantees safe and efficient operation. The integrated polyurethane thread seal (seal type GD) provides excellent tightness and reliability, minimizing the risk of leakage. This robust and precisely engineered coupling plug is an ideal choice for professionals seeking efficiency, safety, and consistent performance in fluid and material transfer systems.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
TW-VK-050-MS	Adaptor VK 50 (TW 1501) with 2" BSP thread, brass	-	16	In stock	Enquiry
TW-VK-050-MSR	Adaptor VK 50 (TW 1501) with 2" BSP thread, brass	-	16	In stock	Enquiry
TW-VK-080-MS	Adaptor VK 80 (TW 501) with GW 3" BSP, brass	-	16	In stock	Enquiry
TW-VK-080-MSR	Adaptor VK 80 (TW 501) with GW 3" BSP, brass	-	16	In stock	Enquiry
TW-VK-100-MS	VK 100 adapter with 4" BSP thread, brass	-	16	In stock	Enquiry
TW-VK-100-MSR	Adaptor VK 100 with GW 4" BSP, brass	-	16	In stock	Enquiry

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The coupling plug for transfer coupling type VK with internal BSP thread is a reliable and durable solution designed for secure installation on hose ends or piping systems equipped with external BSP threads. Manufactured from high-quality brass in compliance with EN ISO 14420-6 (formerly DIN 28450), it ensures long-lasting performance and resistance to demanding working conditions. Suitable for the transfer of liquids, bulk materials, and gases (excluding liquefied gas and vapor), this component offers versatile application across various industries. With a pressure range from -0.8 bar up to 16 bar and an operating temperature spectrum from -20°C to +65°C, depending on the medium and sealing material, it guarantees safe and efficient operation. The integrated polyurethane thread seal (seal type GD) provides excellent tightness and reliability, minimizing the risk of leakage. This robust and precisely engineered coupling plug is an ideal choice for professionals seeking efficiency, safety, and consistent performance in fluid and material transfer systems.