S25A單向閥/S-25A

S25A單向閥產(chǎn)品概述

S25A單向閥是一種液壓系統(tǒng)中常用的直通式方向控制閥，主要用于防止油液或壓縮空氣反向流動。該閥采用鑄鐵或鑄鋼材質(zhì)，公稱通徑為25mm，工作壓力可達(dá)31.5MPa，適用于礦物油介質(zhì)，溫度范圍為-30℃至+80℃。其結(jié)構(gòu)設(shè)計簡潔，通過錐形閥芯實現(xiàn)單向密封，具有響應(yīng)快速、泄漏量小的特點，廣泛應(yīng)用于注塑機(jī)械、工程機(jī)械及冶金設(shè)備等領(lǐng)域。該閥提供螺紋連接和法蘭連接兩種安裝方式，便于集成到各類液壓管路中。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.

功能特點與工作原理

S25A單向閥通過彈簧預(yù)緊力與流體壓力平衡實現(xiàn)自動啟閉：當(dāng)進(jìn)口壓力（P口）超過彈簧力時，閥芯開啟允許介質(zhì)正向流動；當(dāng)壓力消失或反向時，閥芯在彈簧作用下關(guān)閉，阻斷逆向流動。直角式設(shè)計可減少管路空間占用，而內(nèi)泄式或外泄式液控選項（如Z2S系列衍生型號）可擴(kuò)展為雙向控制功能，適用于需保壓或鎖緊的液壓缸系統(tǒng)。此外，該閥的緊湊型設(shè)計使其在高壓環(huán)境中仍能保持穩(wěn)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.

應(yīng)用場景與兼容性

S25A單向閥兼容多種液壓品牌型號（如北京華德HUADE、力士樂REXROTH的S25A1.0系列），可替代同類管式單向閥。典型應(yīng)用包括：空壓機(jī)氣罐防回流、立式液壓缸防下滑鎖緊、大流量系統(tǒng)排油回路等。其模塊化設(shè)計支持與節(jié)流閥、順序閥組合使用，形成單向節(jié)流閥或單向順序閥復(fù)合功能。用戶可根據(jù)介質(zhì)特性選擇鑄鐵或不銹鋼閥體材質(zhì)，以適應(yīng)油品、水或腐蝕性流體環(huán)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.

安裝與維護(hù)注意事項

安裝時需確保閥體箭頭方向與介質(zhì)流向一致，避免倒裝導(dǎo)致功能失效。對于易產(chǎn)生水擊的管路，建議搭配緩沖型止回閥以延長使用壽命。日常維護(hù)中，應(yīng)定期檢查閥芯磨損情況，并通過清洗濾網(wǎng)減少雜質(zhì)對密封面的影響。運輸或存儲時需保持閥門干燥，防止銹蝕。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.

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S25A單向閥/S-25A
 

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