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The Steel Close Type Quick Release Coupling With Valve is a heavy-duty connector engineered for high-pressure hydraulic and pneumatic systems, designed to deliver reliable, leak-free performance in demanding industrial environments. Crafted from heat-treated carbon steel (ASTM A105) with a zinc-plated finish, this coupling combines exceptional strength with corrosion resistance, making it a staple for critical applications where durability is non-negotiable.
A standout feature of this hydraulic quick coupling is its "close type" design, which ensures both male and female ends automatically shut off when disconnected—preventing fluid loss, air ingress, and contamination. This design not only enhances operational safety but also minimizes downtime during connection changes. Compliant with ISO 7241-B standards, it offers seamless compatibility with leading global series such as PARKER 60, FASTER HNV, AEROQUIP FD45, and HANSEN HK, making it a versatile choice for cross-brand system integration. Whether for mobile hydraulics, construction machinery, or industrial equipment, its compact structure and lightweight build simplify handling, while the quick-release mechanism enables one-handed operation, reducing operator fatigue in high-frequency use scenarios.
Parameter | Details |
Material | Heat-treated carbon steel (ASTM A105) with zinc-plated finish |
Yield Strength | 250 MPa |
Working Pressure | 350 bar (5075 PSI) |
Temperature Range | -40°C to 120°C (-40°F to 248°F); up to 200°C (392°F) with FKM seals |
Corrosion Resistance | 8μm zinc plating, 500+ hours of salt spray resistance |
Flow Rate (3/8" size) | Up to 100 L/min (minimal pressure drop) |
Compatibility | ISO 7241-B standards; compatible with PARKER 60, FASTER HNV, etc. |
Valve Type | Spring-loaded poppet valves (both male and female ends) |
Locking Mechanism | Knurled steel collar with ball-bearing locking |
Both the male plug and female socket are equipped with spring-loaded poppet valves that activate instantly upon disconnection. This automatic shut-off traps fluid in the lines, eliminating spills and preventing atmospheric contaminants from entering the system—critical for maintaining fluid purity in precision hydraulic setups. The valve design prioritizes minimal pressure drop, ensuring efficient fluid flow even in high-demand operations.
Built from heat-treated carbon steel, the coupling boasts a yield strength of 250 MPa, enabling it to withstand extreme pressure up to 350 bar (5075 PSI). The 8μm thick zinc-plated finish enhances corrosion resistance, passing 500+ hours of salt spray testing—making it suitable for outdoor, marine, and harsh industrial environments where exposure to moisture and chemicals is common.
The ergonomic knurled steel collar simplifies operation: a simple axial motion engages or disengages the coupling, with ball bearings securing the connection to resist vibrations and pressure surges. This design reduces operator effort during frequent attachments/detachments, making it ideal for applications requiring rapid tool or hose changes.
Engineered to perform across a broad temperature range from -40°C to 120°C (-40°F to 248°F), this coupling meets the needs of diverse climates and industrial processes. For high-temperature applications (e.g., foundries, heat treatment facilities), optional FKM seals extend the range to 200°C (392°F), ensuring consistent performance in extreme heat.
Valve seats are recessed within the coupling body to minimize exposure to dirt and debris, reducing wear and extending service life. An optional protective cap for the female socket further enhances durability during storage. Additionally, critical components like valves and seals are replaceable via a separate repair kit, eliminating the need for full coupling replacement and lowering maintenance costs.
In construction and heavy equipment—such as excavators, cranes, and forklifts—this coupling facilitates quick, spill-free connections between hydraulic cylinders, pumps, and motors. Its leak-proof design is especially valuable when swapping attachments (e.g., buckets, grapples), preventing hydraulic fluid loss that could damage machinery or harm the environment.
For high-pressure industrial systems like press machines, injection molding equipment, and steel mill hydraulics, the coupling’s ability to handle 350 bar pressure and resist corrosion ensures uninterrupted operation. Its compact size fits into tight spaces, making it a practical choice for complex machinery layouts.
Truck-mounted cranes, agricultural sprayers, and aerial work platforms benefit from the coupling’s lightweight build and rapid connection mechanism. It streamlines hose attachments in mobile fluid power systems, where efficiency and reliability directly impact productivity.
Beyond hydraulics, the coupling is suitable for high-pressure pneumatic applications (up to 20 bar), including sandblasting, rock drilling, and heavy-duty air tools. Its airtight seal prevents pressure loss, ensuring tools operate at peak performance.
This Steel Close Type Quick Release Coupling With Valve stands out as a robust, versatile solution for industries demanding safe, efficient, and durable fluid connections—combining advanced engineering with user-centric design to meet the toughest operational challenges.
