ISO 7241-B Connect Under Pressure Hydraulic Quick Couplings

Product Specification

Feature

JINGYE Fittings supplies JY-ISOB-CUP ISO 7241-B Connect Under Pressure Hydraulic Quick Couplings for hydraulic circuits retaining static or trapped pressure. Series B geometry combines double-shutoff poppets, ball locking and decompression. Key Product Advantages: 1. JY-ISOB-CUP Series and Connection Selection JY-ISOB-CUP identifies the ISO 7241-B residual-pressure coupling family. Published JINGYE coupling-set descriptions include 1/4"-1-1/2" BSP/NPT port options. Coupling body size, port size, male plug, female socket and pressure-eliminator configuration are specified separately. Limits depend on the chosen assembly. 2. ISO 7241-1 Series B Mating Geometry Series B plug-nose dimensions, engagement groove, socket entry, seal alignment and locking-ball positions support mating with dimensionally compatible ISO 7241-1 Series B counterparts. Series B is distinct from ISO 7241-A and ISO 16028. Interface fit does not establish CUP capability or equivalent ratings. 3. Pressure-Eliminator and Decompression Mechanism A specialized pressure-eliminator valve, auxiliary poppet or pressure-balancing passage addresses pressure trapped behind a disconnected hydraulic connector. The design can reduce the force needed to initiate engagement before the main poppet valves open. The feature may be in the plug, socket or matched set. 4. Residual-Pressure Connection for Trapped Oil CUP capability helps reconnect isolated hoses and circuits affected by static pressure or thermal expansion. Permitted residual connection pressure, allowable pressurized half, engagement force and connection procedure are design-specific. Parker Tema IB illustrates both plug and socket pressure eliminators. Connect under pressure does not automatically mean disconnect under pressure. 5. Spring-Loaded Poppet Double Shutoff Conical poppet valves in both halves close when separated and open after full connection, helping retain hydraulic fluid in disconnected lines. Precision valve seats, springs and elastomer seals control leakage. Poppet designs may spill fluid and are not ISO 16028 flat-face couplings. 6. Ball-Locking Sleeve and Mechanical Engagement The female socket secures the plug with radial locking balls, a sliding sleeve and return springs. Controlled groove geometry, poppet travel, sleeve stroke and ball retention contribute to reliable engagement. The pressure-eliminator feature complements rather than replaces the Series B mechanical locking system. Full engagement is essential before operation. 7. Working Pressure, Connection Pressure and Flow Comparable Parker Tema IB Series B designs publish size-dependent working pressures of approximately 250-400 bar; a 1/2" pressure-eliminator socket example lists 300 bar coupled working pressure. These are reference-product values, not uniform JY-ISOB-CUP ratings. Working, proof and burst pressures differ from allowable residual connection pressure. Flow capacity and pressure drop depend on body size, valve geometry, oil viscosity and temperature. 8. Engineered Metals, Seals and Corrosion Protection Precision-machined carbon steel and selected brass or stainless components can be configured with hardened valve parts, locking balls and corrosion-resistant springs. NBR suits compatible mineral hydraulic oils; FKM can support selected higher-temperature fluids. Carbon-steel components may receive trivalent-chromium zinc plating, typically 8-12 micrometers, or enhanced protective finishes. Materials are selected for the required application. 9. Inspection and Residual-Pressure Function Testing JINGYE Fittings operates under ISO 9001:2015 quality management. Manufacturing controls cover Series B dimensions, valve seats, decompression passages, locking grooves, sleeve movement, threads, seals and cleanliness. Agreed tests can include leakage, pressure drop, proof/burst strength, impulse cycling and engagement force at defined residual pressure, identifying the pressurized coupling half. 10. OEM Engineering and Second-Source Procurement Options include plug-only, socket-only and matched sets; decompression-valve position; BSPP or NPT ports; NBR/FKM seals; surface finishes, dust protection, marking and private-label packaging. Customer drawings and mating samples support dimensional comparison. JINGYE Fittings supports prototype evaluation, mixed-SKU sourcing, custom configurations, replenishment and OEM alternative-source development. 11. Agriculture, Construction and Industrial Hydraulics Applications include excavator attachments, loaders, tractors, implements, mobile hydraulic equipment, hose assembly production, industrial power units, presses, mining and forestry service, and industrial MRO. JY-ISOB-CUP targets detachable circuits that may retain pressure after disconnection or temperature changes, within the specified coupling and connection-pressure limits.