The two-sided shut-off quick coupling socket Series 25 DN 7.4 with external BSPT thread is designed for demanding applications where reliability, safety, and efficiency are essential. Its solid brass construction, combined with precision-engineered components such as AISI 301 steel springs and rings, AISI 420 steel locking balls, and durable NBR sealing, guarantees long-lasting performance even under intensive use. Thanks to the innovative ULTRA-FLO valve, the coupling ensures excellent tightness while delivering an exceptionally high flow rate of 780 l/min (Pe=6 bar, Δp=0.5 bar, air), making it ideal for laboratory equipment, liquid and gas sampling, as well as pneumatic tools. With a working pressure of up to 35 bar and an operating temperature range from -20°C to +100°C, it provides maximum versatility across a wide spectrum of industrial and laboratory environments. Engineered for precision and durability, this coupling socket combines ease of use with superior flow efficiency, ensuring seamless integration into professional systems where performance and safety cannot be compromised.