Operating Principle
This 1/4″ threaded hydraulic quick coupling plug (ISO‑A PR type, internal thread) is designed for industrial and transport hydraulic systems that require fast and reliable connections. Constructed from zinc‑plated carbon steel with NBR sealing, it resists corrosion, vibration, and continuous operation. It adheres to ISO 7241‑A standards and supports working pressures up to 250–300 bar and flows around 75–100 l/min. The integrated dry‑break poppet valve stays closed when disconnected to prevent fluid leakage and contamination. Manual, tool‑free screw-in and release make it a fast, secure, and low-maintenance solution.
