Is the Brass DN5 Quick-Connect Socket with Double Shut-Off Valve, Threaded, Series 21KB compatible with both air (6 bar) and water applications up to 35 bar?

Yes. The Brass DN5 Quick-Connect Socket with Double Shut-Off Valve, Threaded, Series 21KB is compatible with both air (at 6 bar) and water applications (up to 35 bar). The product delivers 170 l/min for air at 6 bar and 3.2 l/min for water, has a maximum working pressure of 35 bar, brass construction with stainless steel internals and NBR seals, and an operating temperature range of -20°C to +100°C—making it suitable and reliable for both media within those limits.

Can the Brass DN5 Quick-Connect Socket with Double Shut-Off Valve, Threaded, Series 21KB withstand continuous operation at the maximum working pressure of 35 bar without accelerated wear?

Yes. The Brass DN5 Quick-Connect Socket with Double Shut-Off Valve, Threaded, Series 21KB can withstand continuous operation at the maximum working pressure of 35 bar without accelerated wear, provided normal operating conditions and routine maintenance are observed. The product description specifies a working pressure up to 35 bar and highlights construction from robust brass, stainless steel springs and balls, and high-quality NBR seals—materials chosen for resistance to wear, pressure and temperature fluctuations (-20°C to +100°C). The double shut-off valve design reduces internal leakage and stress during connection/disconnection, and the connector is expressly described as guaranteeing durability and consistent results even under challenging conditions. Continuous operation at maximum rating still assumes proper application (compatible media, avoidance of pressure spikes, correct installation, and periodic inspection/replacement of seals as needed); neglecting these can reduce service life.

Brass DN5 Quick-Connect Socket with Double Shut-Off Valve, Threaded, Series 21KB

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

Additional information

Material	B – brass (bronze)

The quick-connect socket series 21KB in Eurostandard DN5 (MINI) design offers a compact yet highly efficient solution for demanding industrial applications. Equipped with a double shut-off system featuring valves in both the socket and the plug, it ensures maximum safety and prevents unintended leakage, making it ideal for processes where reliability is critical. Designed for one-handed operation, it combines user convenience with outstanding performance, delivering an impressive flow rate of 170 l/min for air at 6 bar and 3.2 l/min for water with minimal pressure loss. With a working pressure of up to 35 bar, this connector guarantees durability and consistent results even under challenging conditions. Manufactured from robust brass with stainless steel springs and balls, and sealed with high-quality NBR, it provides excellent resistance to wear, pressure, and temperature fluctuations ranging from -20°C to +100°C. Its compact dimensions make it the perfect choice for installations where space is limited but high flow efficiency and reliability are essential.

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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The quick-connect socket series 21KB in Eurostandard DN5 (MINI) design offers a compact yet highly efficient solution for demanding industrial applications. Equipped with a double shut-off system featuring valves in both the socket and the plug, it ensures maximum safety and prevents unintended leakage, making it ideal for processes where reliability is critical. Designed for one-handed operation, it combines user convenience with outstanding performance, delivering an impressive flow rate of 170 l/min for air at 6 bar and 3.2 l/min for water with minimal pressure loss. With a working pressure of up to 35 bar, this connector guarantees durability and consistent results even under challenging conditions. Manufactured from robust brass with stainless steel springs and balls, and sealed with high-quality NBR, it provides excellent resistance to wear, pressure, and temperature fluctuations ranging from -20°C to +100°C. Its compact dimensions make it the perfect choice for installations where space is limited but high flow efficiency and reliability are essential.