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The Quick Release Coupling Carbon Steel Hydralic Hex Quick Connect is a heavy-duty solution for high-pressure hydraulic systems, designed to enable fast, leak-free connections in industrial, mobile, and marine applications. Constructed from heat-treated carbon steel (ASTM A105, tensile strength 485MPa) with a zinc-plated finish (8μm thickness), this coupling features a hexagonal body for easy wrench tightening and a spring-loaded locking mechanism that withstands vibrations and pressure surges. The self-sealing design prevents fluid loss during disconnection, making it ideal for applications where safety, efficiency, and reliability are paramount, such as construction machinery, agricultural equipment, and industrial hydraulics.
1. High-Pressure Performance: Rated for working pressures up to 400 bar (5800 PSI) and burst pressures of 1200 bar, the coupling handles extreme hydraulic loads in heavy-duty applications. The hexagonal nut (17-32mm wrench size) provides superior torque transmission compared to round bodies.
2. Self-Sealing Valve Technology: Both male and female connectors feature poppet valves that automatically shut off fluid flow when disconnected, trapping fluid in the lines and preventing air ingress or spills. The valves open fully when connected, minimizing pressure drop (≤0.5 bar at 50 L/min flow).
3. Corrosion-Resistant Construction: The carbon steel body with zinc-nickel plating (ASTM B633) offers 500+ hours of salt spray resistance, while the FKM seals (standard) withstand temperatures from -20°C to 200°C (-4°F to 392°F) and are compatible with mineral oils, synthetic fluids, and water-glycol mixtures.
4. Ergonomic Quick-Connect Design: A knurled locking collar allows one-handed operation—push to connect, pull to disconnect—with audible/ tactile feedback confirming full engagement. The compact design (length: 85-150mm based on size) fits into tight spaces around hydraulic cylinders and pumps.
5. ISO 7241-B Compatibility: Conforms to ISO 7241-B (female) and ISO 7241-A (male) standards, ensuring interchangeability with most global hydraulic quick-connect systems (Parker, Eaton, Stucchi).
• Construction Machinery: Connects hydraulic hoses on excavators, loaders, and cranes for quick attachment of buckets, grapples, and breakers, reducing downtime during equipment changes.
• Agricultural Equipment: Used in tractors, combines, and sprayers to connect implement hydraulics, resisting dirt, moisture, and crop debris in field environments.
• Industrial Hydraulics: Ideal for press machines, injection moulding hydraulics, and steel mill equipment, ensuring reliable connections in high-vibration, high-temperature settings.
• Marine Hydraulics: Suitable for shipboard cranes, stabilizers, and steering systems, with optional 316L stainless steel versions available for saltwater resistance.
Q: Can this coupling be used with water-based hydraulic fluids?
A: Yes, the FKM seals are compatible with water-glycol mixtures (up to 50% water content). For pure water applications, specify FDA-compliant EPDM seals (custom order).
Q: What is the recommended torque for tightening the hexagonal nut?
A: Torque values vary by size: 30-50 N·m for 3/8" NPT, 50-80 N·m for 1/2" NPT. Over-tightening may damage the sealing surface—use a torque wrench for precision.
Q: How do I prevent the locking collar from freezing in cold climates?
A: Apply a thin layer of low-temperature grease (e.g., lithium complex grease rated for -40°C) to the collar and valve stems during installation.
Q: Is the coupling suitable for vacuum applications?
A: It supports vacuum up to 90kPa (absolute pressure), but ensure the seal material (FKM/EPDM) is rated for vacuum to prevent collapse of the poppet valve.
Q: Can I get this coupling with custom thread types (e.g., metric)?
A: Yes, we offer NPT, BSPP, and metric (M18x1.5-M33x2) threads, with custom thread sizes available for orders ≥100 units.
