ISO 7241-A Connect Under Pressure Hydraulic Quick Couplings

Product Specification

Feature

JINGYE Fittings supplies JY-ISOA-CUP ISO 7241-A Connect Under Pressure Hydraulic Quick Couplings for circuits with trapped residual pressure. The Series A poppet-valve design incorporates a specialized decompression mechanism for connection under defined conditions. Key Product Advantages: 1. JY-ISOA-CUP Series and Reference Interface JY-ISOA-CUP is the published series designation. The 12.5 mm (1/2" class) ISO interface provides a reference configuration for product selection. Male plug and female socket variants depend on where the decompression mechanism is installed; port size and mating interface are specified separately. 2. ISO 7241-1 Series A Mating Compatibility The ISO 7241-1 Series A interface defines mating features such as the plug profile, engagement groove, socket bore and locking geometry. Dimensionally compatible Series A halves can be selected for the intended assembly. Standard interface compatibility does not independently establish residual-pressure connection capability. 3. Specialized Decompression Valve Mechanism A pressure-relief, pressure-eliminator or pressure-balancing arrangement addresses trapped hydraulic pressure during coupling. Depending on the construction, an auxiliary valve or staged poppet movement acts before full valve opening, reducing connection resistance. The decompression mechanism may be placed in the plug, socket or engineered matched set. 4. Defined Residual-Pressure Connection CUP designs facilitate reconnection when pressure remains in an isolated hydraulic line, including pressure caused by temperature rise. The permitted pressure, pressurized half and required connection force are determined by the selected valve design. Connect Under Pressure does not automatically include Disconnect Under Pressure or simultaneous pressure on both halves. 5. Spring-Loaded Poppet Double Shutoff Conical poppet valves close when the coupling halves separate and open after complete engagement. Spring return and precision-finished valve seats help retain hydraulic fluid in disconnected lines. Conventional poppet-valve couplings may release some oil on separation and are distinct from ISO 16028 flat-face low-spill designs. 6. Ball Locking and Repeatable Engagement The female coupler uses locking balls and a sliding sleeve to retain a compatible Series A male plug. Controlled groove dimensions, sleeve movement, ball engagement, valve stroke and spring action contribute to repeatable operation. Connection-force testing under residual pressure evaluates the CUP mechanism separately from normal coupling. 7. Working Pressure, Flow and Pressure Drop The comparable 12.5 mm decompression-coupling reference has a 250 bar working-pressure rating, 45 L/min rated flow and 90 L/min published maximum flow. Reference disconnection spillage is 2.7 mL under specified test conditions. These benchmarks inform selection; permitted residual connection pressure, proof/burst strength, impulse life and actual JY-ISOA-CUP ratings require configuration-specific evaluation. 8. Engineered Steel Components and Seals Precision CNC-machined carbon steel bodies and sleeves combine with hardened steel poppets, decompression components, locking balls and springs. NBR seals support compatible mineral hydraulic oils; FKM and PTFE anti-extrusion elements may suit selected fluids and conditions. Trivalent chromium zinc plating, typically 8–12 μm, provides carbon-steel surface protection. 9. Dimensional Inspection and CUP Testing JINGYE Fittings operates under ISO 9001:2015 quality management. Inspection covers the Series A mating profile, locking groove, poppet seats, decompression passages, valve stroke, threads, coating and cleanliness. Agreed tests can cover leakage, pressure drop, connection force at defined residual pressure, proof/burst pressure, impulse endurance and repeated coupling cycles. 10. OEM Configuration and Second-Source Supply Engineering options include decompression-valve layout, plug/socket matching, BSPP/NPT/metric ports, seals, protective caps, coatings, marking and private-label packaging. Drawings, samples and mating halves support dimensional comparison. JINGYE Fittings supports sample evaluation, mixed-SKU sourcing, custom configurations and repeat OEM orders. 11. Agricultural, Mobile and Industrial Hydraulics Applications include tractors, hydraulic implements, excavator attachments, loaders, forestry equipment, mining service tools, mobile machinery and industrial power units. JY-ISOA-CUP addresses hydraulic hoses and auxiliary circuits that can retain pressure after disconnection, supporting service and attachment changes within the specified connection limits.