Can the Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB be connected to single shut-off versions without opening the valve?

No . the Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB cannot be connected to single shut-off versions without opening the valve. The double shut-off design has valves in both the socket and the plug; when mated to a single shut-off part, the valve will not open, preventing flow. Use matching double shut-off counterparts to ensure proper operation.

Does the Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB require a matching double shut-off plug for proper operation?

Yes. The Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB requires a matching double shut-off plug for proper operation. The double shut-off design includes valves in both the socket and the plug; connecting it to a single shut-off version will prevent the valve from opening and block flow. Use a compatible double shut-off plug to ensure proper valve operation and full flow.

Is the Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB suitable for one-handed operation under full pressure?

Yes. Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB is suitable for one-handed operation under full pressure. The product description explicitly states "One-handed operation possible." Its working pressure is up to 35 bar and flow rates are specified (170 l/min for air at 6 bar, 3.2 l/min for water with Îp=1 bar), materials and sealing are suitable for pressurized use, so one-handed connection/disconnection under full pressure is supported.

Coupling socket double shut-off DN5 with hose end, threaded, brass, series 21KB

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

Additional information

Material	B – brass (bronze)
Standard length [m]	2

Quick-connect socket, double shut-off, Eurostandard DN5 (MINI), series 21KB with hose end. Double shut-off version, has a valve in the socket and in the plug, and should not be connected with single shut-off versions as the valve will not open. Widely used in the industry where small dimensions are required with high flow efficiency and low pressure drop. One-handed operation possible. Flow rate: 170 l/min (Pe = 6 bar, Δp=0.5 bar – air), 3.2 l/min (Δp=1 bar Kv=0.19 – 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-21KBTF06MPX	Quick coupling socket 21KB DN5, for 6 mm hose, brass, NBR	6	35	In stock	Enquiry
RE-21KBTF08MPX	Quick coupling socket 21KB DN5, for 8 mm hose, brass, NBR	8	35	In stock	Enquiry
RE-21KBTF10MPX	Quick coupling socket 21KB DN5, for hose 10 mm, brass, NBR	10	35	In stock	Enquiry

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Quick-connect socket, double shut-off, Eurostandard DN5 (MINI), series 21KB with hose end. Double shut-off version, has a valve in the socket and in the plug, and should not be connected with single shut-off versions as the valve will not open. Widely used in the industry where small dimensions are required with high flow efficiency and low pressure drop. One-handed operation possible. Flow rate: 170 l/min (Pe = 6 bar, Δp=0.5 bar – air), 3.2 l/min (Δp=1 bar Kv=0.19 – water). Working pressure: 35 bar. Material: brass, stainless steel (springs and balls). Sealing: NBR. Operating temperature: from -20°C to +100°C.