液控单向阀，DFY-B10H4

产品概述

液控单向阀DFY-B10H4是一种高性能液压控制元件，主要用于液压系统中实现油流的单向控制与反向解锁功能。该阀采用锥形阀芯设计，确保密封性能优异，适用于需要严格保压或防止油液反向流动的工况。其结构紧凑，安装形式灵活，支持板式或管式连接，可适配多种液压系统配置。通过外部控制油压驱动，DFY-B10H4能在需要时实现油液双向流通，满足复杂液压回路的控制需求。典型应用包括工程机械、冶金设备、矿山机械及注塑机等领域的液压锁紧、负载保持及补油回路。149

技术特点

DFY-B10H4液控单向阀采用铸铁材质，耐压能力达31.5MPa，工作温度范围为-20℃至+80℃，兼容矿物油或磷酸酯液压油等介质。其内部设计包含控制活塞和顶杆机构，当控制油路未接通时，阀芯保持单向截止状态；当控制油压达到设定值（通常≥1.6MPa）时，活塞推动顶杆开启阀芯，允许油液反向流动。根据工况需求，可选择内泄式或外泄式结构，其中外泄式适用于反向油路存在背压的场景，能有效降低控制压力损耗。阀体流道优化设计使得正向流通时压力损失极小，反向开启响应迅速。3616

应用场景

该阀广泛应用于液压系统的保压回路（如注塑机合模机构）、垂直油缸的防下滑锁紧（如起重机支腿）、以及大型设备的充液阀功能（如液压机快速下行补油）。在煤矿液压支护设备中，DFY-B10H4能可靠防止支架因管路泄漏导致的意外位移；在冶金轧机系统中，可配合换向阀组成液压锁，确保轧辊定位精度。其模块化设计便于集成到叠加阀组或独立安装，适配10mm通径的油路需求。122426

Product Overview

The DFY-B10H4 pilot-operated check valve is a high-performance hydraulic component designed for unidirectional flow control and pressure retention in fluid power systems. Featuring a conical poppet design, it ensures reliable sealing and is ideal for applications requiring strict pressure holding or reverse flow prevention. With compact construction and flexible mounting options (subplate or threaded connections), this valve adapts to diverse hydraulic configurations. The external pilot pressure actuation enables bidirectional flow when needed, making it suitable for complex circuits such as load-holding, cylinder locking, and replenishing in industrial machinery. Common applications include construction equipment, metal-forming presses, and mining hydraulic supports.1919

Technical Features

Constructed from cast iron, the DFY-B10H4 withstands pressures up to 31.5MPa and operates within -20℃ to +80℃, compatible with mineral oils or phosphate ester fluids. Its internal mechanism integrates a control piston and push rod: In neutral state, the valve blocks reverse flow; when pilot pressure exceeds the threshold (typically ≥1.6MPa), the piston forces the poppet open for reverse flow. Optional internal or external drain configurations cater to different backpressure conditions, with external drain reducing pilot pressure requirements. The optimized flow path minimizes pressure drop during forward flow while ensuring rapid response during pilot-assisted opening.31623

Typical Applications

This valve excels in pressure-holding circuits (e.g., injection molding machine clamps), vertical cylinder anti-drift locking (e.g., crane outriggers), and rapid-fill functions (e.g., hydraulic press downstroke). In coal mine roof supports, it prevents unintended movement caused by line leakage; for rolling mills, it forms hydraulic locks with directional valves to ensure roll positioning accuracy. The modular design allows stackable or standalone installation, meeting 10mm port size requirements across mobile and industrial hydraulic systems.122426

（注：以上内容严格规避了"最""第一""独家"等广告禁用词，未提及认证/专利信息，中英文各约450字。）

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