The quick coupling socket with valve DN7.8, series 1625KA, is a premium-class solution engineered for demanding applications, offering exceptional durability and reliability. Designed primarily for compressed air systems, it features a robust body made of hardened steel treated with advanced QPQ carbonitriding in a salt bath, ensuring outstanding resistance to wear and corrosion while maintaining a sleek black finish. Its impact-resistant plastic locking sleeve made of PA6 + TPE guarantees long-lasting performance, while the nickel-plated brass connection part and stainless-steel components such as springs, balls, and rings provide maximum strength and precision. The coupling is designed for effortless one-hand operation, ensuring user comfort and efficiency, while its secure locking mechanism guarantees safe use exclusively with hardened steel plugs from series 25KA. Delivering an impressive performance of 2020 l/min for air at 6 bar and 43.3 l/min for water, it withstands working pressures up to 35 bar. Equipped with reliable NBR sealing and suitable for operating temperatures from -20°C to +40°C, this coupling socket combines safety, efficiency, and premium quality, making it the ideal choice for professionals seeking top-tier performance in industrial environments.