Is the DN7.8 Quick-Connect Socket with Valve, Threaded, Hardened Steel, 1600KA Series compatible only with 25KA series hardened steel plugs?

Yes. The DN7.8 Quick-Connect Socket with Valve, Threaded, Hardened Steel, 1600KA Series is designed to operate safely and reliably exclusively when paired with hardened steel plugs from the 25KA series. The product description explicitly states compatibility is limited to 25KA series hardened steel plugs to ensure proper sealing, one-hand operation, and the rated performance and safety.

Can the DN7.8 Quick-Connect Socket with Valve, Threaded, Hardened Steel, 1600KA Series be used with non-hardened plugs for low-pressure or temporary applications?

No. The DN7.8 Quick-Connect Socket with Valve, Threaded, Hardened Steel, 1600KA Series is designed to operate safely and reliably only when paired with hardened steel plugs from the 25KA series. Its valve and locking mechanism, material hardness and tolerances are matched to hardened plugs; using non-hardened plugs—even for low-pressure or temporary applications—can lead to improper sealing, accelerated wear, leakage, disengagement under load, or premature damage to both socket and plug. For safe temporary or low-pressure use, select a coupling specifically rated for compatibility with softer plugs or consult the manufacturer for approved alternatives.

DN7.8 Quick-Connect Socket with Valve, Threaded, Hardened Steel, 1600KA Series

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

Additional information

Material	CS – steel (cast iron)

The premium quick coupling socket with valve DN7.8 from the 1600KA series is engineered for maximum efficiency in compact dimensions, making it the ideal solution for demanding compressed air applications. Its robust body, manufactured from hardened steel and treated with advanced QPQ carbonitriding in a salt bath, ensures exceptional resistance to wear and corrosion while maintaining a sleek black finish. Designed for effortless one-hand operation, the coupling guarantees safe and reliable performance exclusively when paired with hardened steel plugs from the 25KA series. Delivering an impressive flow rate of 2020 l/min for air (Pe = 6 bar, Δp = 0.5 bar) and 43.3 l/min for water (Δp = 1 bar, Kv = 2.6), it combines compact size with outstanding power. With a working pressure of up to 35 bar and a wide operating temperature range from -20°C to +100°C, this coupling is built to perform under challenging conditions. High-quality materials such as nickel-plated brass for the connection part and sleeve, stainless steel for springs, balls, and rings, as well as durable NBR sealing, further enhance its reliability and longevity. This makes the 1600KA series the perfect choice for professionals who value durability, safety, and superior performance in every detail.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
RE-1600KAAK13SPN	Quick coupling socket 1600 DN7.8, GZ 1/4" BSPT, NBR	-	35	In stock	Enquiry
RE-1600KAAK17SPN	Quick coupling socket 1600 DN7.8, GZ 3/8" BSPT, NBR	-	35	In stock	Enquiry
RE-1600KAAK21SPN	Quick coupling socket 1600 DN7.8, GZ 1/2" BSPT, NBR	-	35	In stock	Enquiry
RE-1600KAIW13SPN	Quick coupling socket 1600 DN7.8, GW 1/4" BSP, NBR	-	35	In stock	Enquiry
RE-1600KAIW17SPN	Quick coupling socket 1600 DN7.8, GW 3/8" BSP, NBR	-	35	In stock	Enquiry
RE-1600KAIW21SPN	Quick coupling socket 1600 DN7.8, G 1/2" BSP, NBR	-	35	In stock	Enquiry

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The premium quick coupling socket with valve DN7.8 from the 1600KA series is engineered for maximum efficiency in compact dimensions, making it the ideal solution for demanding compressed air applications. Its robust body, manufactured from hardened steel and treated with advanced QPQ carbonitriding in a salt bath, ensures exceptional resistance to wear and corrosion while maintaining a sleek black finish. Designed for effortless one-hand operation, the coupling guarantees safe and reliable performance exclusively when paired with hardened steel plugs from the 25KA series. Delivering an impressive flow rate of 2020 l/min for air (Pe = 6 bar, Δp = 0.5 bar) and 43.3 l/min for water (Δp = 1 bar, Kv = 2.6), it combines compact size with outstanding power. With a working pressure of up to 35 bar and a wide operating temperature range from -20°C to +100°C, this coupling is built to perform under challenging conditions. High-quality materials such as nickel-plated brass for the connection part and sleeve, stainless steel for springs, balls, and rings, as well as durable NBR sealing, further enhance its reliability and longevity. This makes the 1600KA series the perfect choice for professionals who value durability, safety, and superior performance in every detail.