Is the Quick-connection socket DN5 with valve, threaded, brass, series 21KA compatible with pneumatic systems at 35 bar and suitable for water flow (Kv=0.48)?

Quick-connection socket DN5 with valve, threaded, brass, series 21KA is rated with a maximum working pressure of 35 bar, so from a pressure-strength standpoint it is compatible with pneumatic systems operating at 35 bar. However, performance data show air flow 560 l/min at Pe = 6 bar (Îp = 0.5 bar) . flow at much higher pneumatic pressure is not specified . and for water the stated flow is 8 l/min at Îp = 1 bar (Kv = 0.48). Practical conclusions: - Pressure compatibility: Yes . the componentâs working pressure (35 bar) matches the 35 bar pneumatic system. - Media suitability: Yes for water in low-flow applications, given Kv = 0.48 and specified 8 l/min at Îp = 1 bar; it is designed for water use within its temperature and sealing limits (NBR, -20Â°C to +100Â°C). - Pneumatic performance caveat: The listed air flow test is at 6 bar; expected flow and pressure drop at 35 bar are not provided, so verify required flow rates and acceptable Îp for your application or request manufacturer data for air performance at 35 bar. - Materials/seals: Brass body and stainless internals are appropriate for many pneumatic/water uses; check NBR compatibility with your fluid/temperature. If you need a definitive match, confirm required flow/pressure-drop at 35 bar and operating medium/temperature against the componentâs specs or obtain manufacturer test data at 35 bar.

Can the Quick-connection socket DN5 with valve, threaded, brass, series 21KA be used with aggressive fluids or only for air and water?

Quick-connection socket DN5 with valve, threaded, brass, series 21KA uses brass and stainless steel (springs and balls) with NBR seals. It is specified for air and water (performance data given) and an operating temperature of -20Â°C to +100Â°C. NBR seals and brass components are not suitable for many aggressive chemicals (strong acids, alkalis, solvents, aromatic hydrocarbons) because they can degrade NBR and corrode brass. For mild, nonâaggressive fluids (some oils, lubricants, diluted media compatible with NBR and brass) it may be acceptable, but for aggressive fluids you should choose materials and seals rated for chemical compatibility (e.g., FKM/Viton, PTFE, stainless grades) or consult the manufacturer with the exact fluid and concentration before use.

Does the Quick-connection socket DN5 with valve, threaded, brass, series 21KA support one-handed connection under high flow (560 l/min) conditions?

Yes. The Quick-connection socket DN5 with valve, threaded, brass, series 21KA supports one-handed connection under high flow (560 l/min) conditions. The product description explicitly states "One-handed operation" and lists an air performance of 560 l/min at Pe = 6 bar with Îp = 0.5 bar, indicating it is designed to allow single-handed coupling while delivering that high flow. Materials (brass body, stainless springs/balls) and working pressure (35 bar) further support robust operation at the specified flow.

Quick-connection socket DN5 with valve, threaded, brass, series 21KA

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

Additional information

Material	B – brass (bronze)

Quick coupling socket with valve, Eurostandard DN5 (MINI), series 21KA with external or internal BSP thread. Widely used in the industry where small dimensions are required with high flow efficiency and low pressure drop. One-handed operation. Performance: 560 l/min (Pe = 6 bar, Δp=0.5 bar – air), 8 l/min (Δp=1 bar Kv=0.48 – water). Working pressure: 35 bar. Material: brass, stainless steel (springs and balls). Sealing: NBR. Operating temperature: from -20°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-21KAAW10MPX	Quick coupling socket 21KA DN5, GZ 1/8" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KAAW13MPX	Quick coupling socket 21KA DN5, GZ 1/4" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KAAW17MPX	Quick coupling socket 21KA DN5, GZ 3/8" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KAIW10MPX	Quick coupling socket 21KA DN5, G 1/8" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KAIW13MPX	Quick coupling socket 21KA DN5, G 1/4" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KAIW17MPX	Quick coupling socket 21KA DN5, G 3/8" BSP, brass, NBR	-	35	In stock	Enquiry

Do you need a larger quantity of products or a bespoke quote?

Call us: +48 61 653 02 22 or email us: tubes@tubes-international.com

SEND ENQUIRY

Quick coupling socket with valve, Eurostandard DN5 (MINI), series 21KA with external or internal BSP thread. Widely used in the industry where small dimensions are required with high flow efficiency and low pressure drop. One-handed operation. Performance: 560 l/min (Pe = 6 bar, Δp=0.5 bar – air), 8 l/min (Δp=1 bar Kv=0.48 – water). Working pressure: 35 bar. Material: brass, stainless steel (springs and balls). Sealing: NBR. Operating temperature: from -20°C to +100°C.