Is the Stainless Steel DN5 Plug & Socket with Male Thread, Series 21KA compatible with fluids other than air and water (e.g., oils or chemicals)?

Yes. The Stainless Steel DN5 Plug & Socket with Male Thread, Series 21KA is suitable for many fluids beyond air and water. Key reasons: - Materials: main components in AISI 316Ti stainless steel and locking balls in AISI 420 offer strong corrosion and wear resistance for a wide range of fluids, including many oils and aggressive media. - Sealing: Viton (FKM) seals provide excellent chemical resistance to oils, fuels, hydraulic fluids and many chemicals over a broad temperature range. - Pressure/temperature capability: Rated up to 35 bar and -15°C to +200°C, supporting demanding fluid-transfer conditions. Caveats: - Compatibility depends on the specific oil or chemical (concentration, additives, solvents, oxidizers). Some aggressive chemicals (strong acids, certain ketones, or highly chlorinated solvents) can attack AISI 420 or Viton. - Verify compatibility for long-term service, elevated temperatures, or cyclic pressures by consulting chemical compatibility charts or manufacturer guidance. Conclusion: Generally compatible with oils and many chemicals, but always confirm compatibility for the specific fluid and operating conditions before use.

Can the Stainless Steel DN5 Plug & Socket with Male Thread, Series 21KA be used with food-grade fluids or in sanitary applications?

Stainless Steel DN5 Plug & Socket with Male Thread, Series 21KA is constructed from AISI 316Ti stainless steel (main parts) and AISI 420 (locking balls) and uses Viton seals, which together offer very good corrosion and chemical resistance and a wide temperature range (-15°C to +200°C). These materials are commonly compatible with many food-grade fluids and cleaning agents. However, for bona fide sanitary/food-grade applications you must confirm: - All wetted materials meet applicable food-contact certifications (e.g., FDA, EU 1935/2004, EC 10/2011) — AISI 316Ti and Viton alone are not proof of certification. - Surface finish and roughness (Ra) are appropriate for sanitary use and permit effective cleaning/sanitation. - Design allows full drainability and avoids crevices where product/residues can accumulate. - Compatibility with your specific fluid, CIP/SIP temperatures and chemicals. - Any regulatory or customer-specific hygienic standards (e.g., EHEDG, 3-A) are satisfied. Conclusion: Material selection and temperature/chemical resistance indicate potential suitability for food-related fluids, but without explicit food-contact certification, sanitary design features, and confirmation of surface finish and hygienic approvals, Stainless Steel DN5 Plug & Socket with Male Thread, Series 21KA should not be assumed compliant for sanitary/food-grade use. Verify certifications and hygienic design details with the manufacturer before use.

Stainless Steel DN5 Plug & Socket with Male Thread, Series 21KA

All products, General-purpose low-pressure quick couplings/

Additional information

Material	SS – stainless steel
Standard length [m]	10, 2, 3

The quick coupling plug with Eurostandard DN5 (MINI) valve socket, series 21KA with external lBSP thread, is a high-performance solution designed for demanding industrial applications where compact size, maximum flow efficiency, and minimal pressure loss are essential. Engineered for convenient one-handed operation, it ensures a flow rate of 560 l/min for air at 6 bar with a pressure drop of only 0.5 bar, and 8 l/min for water at Δp=1 bar (Kv=0.48). With a robust working pressure of up to 35 bar, this coupling guarantees reliability even in intensive use. Manufactured from premium AISI 316Ti stainless steel for the main components and AISI 420 steel for the locking balls, it delivers outstanding durability and resistance to wear and corrosion. The viton sealing system provides excellent chemical resistance and ensures leak-free performance, while the wide operating temperature range from -15°C to +200°C makes it suitable for diverse environments. Compact yet powerful, this coupling is the ideal choice for industries seeking efficiency, safety, and long-lasting performance in fluid and air transfer systems.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-21KAAW10EVX	Quick coupling socket 21KA DN5, GZ 1/8" BSP, AISI 316, viton	-	35	In stock	Enquiry
RE-21KAAW13EVX	Quick coupling socket 21KA DN5, GZ 1/4" BSP, AISI 316, viton	-	35	In stock	Enquiry
RE-21KAAW17EVX	Quick coupling socket 21KA DN5, GZ 3/8" BSP, AISI 316, viton	-	35	In stock	Enquiry
RE-21SFAW10EXX	Quick coupling plug 21SF DN5, GZ 1/8" BSP, AISI 316	-	35	In stock	Enquiry
RE-21SFAW13EXX	Quick coupling plug 21SF DN5, GZ 1/4" BSP, AISI 316	-	35	In stock	Enquiry

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The quick coupling plug with Eurostandard DN5 (MINI) valve socket, series 21KA with external lBSP thread, is a high-performance solution designed for demanding industrial applications where compact size, maximum flow efficiency, and minimal pressure loss are essential. Engineered for convenient one-handed operation, it ensures a flow rate of 560 l/min for air at 6 bar with a pressure drop of only 0.5 bar, and 8 l/min for water at Δp=1 bar (Kv=0.48). With a robust working pressure of up to 35 bar, this coupling guarantees reliability even in intensive use. Manufactured from premium AISI 316Ti stainless steel for the main components and AISI 420 steel for the locking balls, it delivers outstanding durability and resistance to wear and corrosion. The viton sealing system provides excellent chemical resistance and ensures leak-free performance, while the wide operating temperature range from -15°C to +200°C makes it suitable for diverse environments. Compact yet powerful, this coupling is the ideal choice for industries seeking efficiency, safety, and long-lasting performance in fluid and air transfer systems.