SV/SL10, 液控单向阀
产品概述
SV/SL10系列液控单向阀是一种锥阀式结构的液压控制元件,主要用于液压系统中实现油流的单向导通与反向控制。该系列产品采用座式阀设计,通过液压控制实现反向流通功能,适用于需要隔离局部压力回路或防止负载下滑的工况。其核心结构包括阀体、主阀芯、先导阀芯、压缩弹簧和控制活塞,确保在高压环境下稳定工作。SV型为无泄油口设计,泄漏油内部回油;SL型则带有泄油口,可实现泄漏油外部回油,进一步降低控制压力需求。127
技术特点
SV/SL10液控单向阀的工作压力范围为0.5至31.5MPa,最大流量可达400L/min,通径覆盖10至30mm。其正向流动时允许油液从A口自由流向B口,反向流动则需通过X口输入控制压力油推动活塞顶开阀芯实现。SL型通过泄油口Y隔离控制活塞的环形面积,有效减少开启所需控制力。产品支持螺纹连接或底板安装,适配多种液压系统布局需求。此外,阀体采用铸铁材质,耐压性能优异,适用于油品介质,工作温度范围为常温至180℃。12627
功能应用
该系列液控单向阀广泛应用于液压系统的保压、锁紧及负载支撑场景。例如,在立式液压缸中可防止活塞因重力下滑;在回路隔离时能避免管路破裂导致的负载失控;还可用于大流量排油或充油阀功能。其闭锁性能可靠,泄漏量少,特别适合冶金设备、工程机械等对稳定性要求较高的领域。通过选配不同开启压力的型号,可满足多样化工况需求。82129
Product Introduction
The SV/SL10 series hydraulic pilot-operated check valves feature a poppet-type structure, designed for unidirectional flow control in hydraulic systems. These valves allow free flow from port A to B while blocking reverse flow unless pilot pressure is applied to port X. The SV type integrates internal leakage oil return, whereas the SL type incorporates an external drain port (Y) to reduce required pilot pressure. Constructed with robust cast iron bodies, they operate within 0.5-31.5MPa pressure ranges and handle flows up to 400L/min. 126
Key Features
With nominal sizes from 10-30mm, these valves offer threaded or subplate mounting options. The SL variant’s external drain isolates piston annular area, minimizing control force. Internal components include main poppet, pilot poppet, compression spring, and control piston, ensuring precise actuation. Suitable for oil-based media at temperatures up to 180°C, their compact design suits space-constrained installations. The valves maintain zero-leakage sealing even during prolonged pressure holding. 2728
Applications
Ideal for load-holding, cylinder locking, and pressure isolation in industrial machinery. Typical uses include: preventing vertical cylinder drift, protecting against load drops during pipe failures, and enabling high-flow discharge in asymmetrical cylinder systems. Widely adopted in metallurgical presses, lifting equipment, and hydraulic power units requiring fail-safe operation. Customizable opening pressures enhance adaptability across diverse hydraulic circuits. 82029
简单介绍
SV/SL10 液控单向阀 SV/SL型液控单向阀是锥阀式结构的,在回路中,只允许油流正向通过,反向则是截止。当接通控制油口X时,压力油使锥阀离开阀座,油液可反向流动。 SV型—泄漏油内部回油 SL型—泄漏油外部回油 SV10/SL10.SV20/SL20.SV30
SV/SL10 液控单向阀
的详细介绍
SV/SL10 液控单向阀
通径(NG)10~30 压力至31.5Mpa 流量至400L/min
SV/SL型液控单向阀是锥阀式结构的,在回路中,只允许油流正向通过,反向则是截止。当接通控制油口X时,压力油使锥阀离开阀座,油液可反向流动。
SV型—泄漏油内部回油
SL型—泄漏油外部回油
SV10/SL10.SV20/SL20.SV30/SL30
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SV/SL型液控单向阀压差流量特性图
注:度验条件:ν=36cSt;t=50℃

说明
Pst1…先导锥阀开启需要的油口X的控制压力(MPa)
Pst…油口X的控制压力(MPa)
P…活塞面上压力(MPa)
P1…油口B的压力(MPa)
p2…油口A的压力(MPa)
A1…主阀锥面截面积(cm2)
A2…先导阀锥部截面积(cm2)
A3…控制活塞截面积(cm2)
A4…控制活塞杆截面积(仅用于SL型阀)(cm2)
A5…油缸活塞面积(cm2)
AR…油缸活塞环面积(cm2)
C…系数(MPa)
F…作用于油缸上的负截(KN)
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