Can Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB be connected to single shut-off couplings?

No. Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB must not be connected to single shut-off couplings. The double shut-off design has valves in both socket and plug; mating it with a single shut-off version will prevent the valve from opening, so the connection will not allow flow.

Can Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB be used with BSP-threaded plugs of different sizes?

Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB cannot be reliably used with BSP-threaded plugs of different sizes. The double shut-off design requires matching plug size/type (double shut-off) so the valve in both socket and plug aligns and opens; mismatched sizes or single shut-off plugs will prevent valve opening and cause malfunction or leakage. Use only same-size, double-shut-off BSP plugs specified for series 21KB to ensure proper operation, flow and sealing.

Does Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB require specific plug orientation for proper valve operation?

Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB does not require a special plug orientation for the valve to operate. The double shut-off design means both socket and plug have valves that open automatically on proper connection; however, it must be connected to a matching double shut-off plug (not a single shut-off version). otherwise the valve will not open. Normal axial insertion (one-handed) is sufficient; no rotational alignment is needed.

Quick-connection socket double shut-off DN5 with valve, threaded, brass, series 21KB

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

Additional information

Material	B – brass (bronze)

Quick-connect socket, double shut-off, Eurostandard DN5 (MINI), series 21KB with external or internal BSP thread. Double shut-off version, features a valve in both the socket and the plug, and should not be connected with the single shut-off version as the valve will not open. Widely used in the industry where compact dimensions are required along 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-21KBAW10MPX	Quick coupling socket 21KB DN5, GZ 1/8" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KBAW13MPX	Quick coupling socket 21KB DN5, GZ 1/4" BSP, brass, NBR	-	35	In stock	Enquiry
RE-21KBIW10MPX	Quick coupling socket 21KB DN5, 1/8" BSP thread, brass, NBR	-	35	In stock	Enquiry
RE-21KBIW13MPX	Quick coupling socket 21KB DN5, 1/4" BSP thread, brass, NBR	-	35	In stock	Enquiry
RE-21KBIW17MPX	Quick coupling socket 21KB DN5, G 3/8" BSP, brass, NBR	-	35	In stock	Enquiry

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Quick-connect socket, double shut-off, Eurostandard DN5 (MINI), series 21KB with external or internal BSP thread. Double shut-off version, features a valve in both the socket and the plug, and should not be connected with the single shut-off version as the valve will not open. Widely used in the industry where compact dimensions are required along 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.