S25A单向阀/S-25A

S25A单向阀产品概述

S25A单向阀是一种液压系统中常用的直通式方向控制阀，主要用于防止油液或压缩空气反向流动。该阀采用铸铁或铸钢材质，公称通径为25mm，工作压力可达31.5MPa，适用于矿物油介质，温度范围为-30℃至+80℃。其结构设计简洁，通过锥形阀芯实现单向密封，具有响应快速、泄漏量小的特点，广泛应用于注塑机械、工程机械及冶金设备等领域。该阀提供螺纹连接和法兰连接两种安装方式，便于集成到各类液压管路中。1619

English Description:
The S25A check valve is a common straight-through directional control valve in hydraulic systems, designed to prevent reverse flow of oil or compressed air. Constructed from cast iron or cast steel with a nominal diameter of 25mm, it operates under working pressures up to 31.5MPa and is suitable for mineral oil media within a temperature range of -30℃ to +80℃. Its simple structure features a conical valve core for reliable one-way sealing, offering rapid response and minimal leakage. Widely used in injection molding machinery, construction equipment, and metallurgical systems, the valve supports both threaded and flange connections for flexible integration into hydraulic pipelines.

功能特点与工作原理

S25A单向阀通过弹簧预紧力与流体压力平衡实现自动启闭：当进口压力（P口）超过弹簧力时，阀芯开启允许介质正向流动；当压力消失或反向时，阀芯在弹簧作用下关闭，阻断逆向流动。直角式设计可减少管路空间占用，而内泄式或外泄式液控选项（如Z2S系列衍生型号）可扩展为双向控制功能，适用于需保压或锁紧的液压缸系统。此外，该阀的紧凑型设计使其在高压环境中仍能保持稳定性能。923

English Description:
The S25A valve operates via a balance between spring preload and fluid pressure: when inlet pressure (Port P) exceeds the spring force, the valve core opens to allow forward flow; when pressure ceases or reverses, the spring automatically closes the core to block backflow. Its right-angle design minimizes pipeline space, while optional internal/external pilot control (e.g., Z2S series variants) enables bidirectional flow for applications requiring pressure retention or cylinder locking. The compact structure ensures stable performance even under high-pressure conditions.

应用场景与兼容性

S25A单向阀兼容多种液压品牌型号（如北京华德HUADE、力士乐REXROTH的S25A1.0系列），可替代同类管式单向阀。典型应用包括：空压机气罐防回流、立式液压缸防下滑锁紧、大流量系统排油回路等。其模块化设计支持与节流阀、顺序阀组合使用，形成单向节流阀或单向顺序阀复合功能。用户可根据介质特性选择铸铁或不锈钢阀体材质，以适应油品、水或腐蚀性流体环境。41824

English Description:
Compatible with multiple hydraulic brands (e.g., HUADE S25A11B or REXROTH S25A1.0 series), this valve serves as a direct replacement for threaded check valves. Typical applications include preventing backflow in air compressor tanks, locking vertical cylinders against gravitational descent, and managing high-flow discharge in hydraulic circuits. Its modular design allows integration with throttle or sequence valves for combined functionalities. Users can select cast iron or stainless steel bodies to match oil, water, or corrosive fluid requirements.

安装与维护注意事项

安装时需确保阀体箭头方向与介质流向一致，避免倒装导致功能失效。对于易产生水击的管路，建议搭配缓冲型止回阀以延长使用寿命。日常维护中，应定期检查阀芯磨损情况，并通过清洗滤网减少杂质对密封面的影响。运输或存储时需保持阀门干燥，防止锈蚀。1619

English Description:
Installation requires aligning the valve’s arrow mark with the medium flow direction to avoid malfunction. In pipelines prone to water hammer, pairing with cushioned check valves is recommended to enhance durability. Routine maintenance involves inspecting valve core wear and cleaning filters to minimize seal contamination. During storage or transit, keep the valve dry to prevent corrosion.

（注：全文约600字，严格规避广告法禁用词汇，未提及认证或专利信息。）

S25A单向阀/S-25A
 

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