中文介绍
YFB10H4S/溢流阀YF-B10H4-S是一种广泛应用于液压系统的压力控制元件。该溢流阀采用平衡活塞式结构，压力调整方式为手轮式，工作性能稳定可靠。其设计紧凑，体积小、重量轻，便于安装和维护，同时噪音低，能有效降低液压系统的运行噪音。
该系列阀可在≤31.5MPa的压力下正常工作，工作介质为20号或30号液压油等，正常油温为50±5℃，过滤精度不得低于30微米。其安装方式灵活，螺纹连接和法兰连接的阀盖能在四周90°位置安装，板式连接能在三个90°位置上任意安装。通过旋转调压手轮，可方便地改变阀的调定压力，右旋时压力增加，左旋时压力减小，更换弹簧还能获得不同的压力调节范围。此外，该阀还可作为远程控制、高低压多点控制或卸荷使用，遥控口M18×1.5螺堵拧下后可接入控制油路。其P口为进油口，O口为溢油口，K口为外控口。

英文 Introduction
The YFB10H4S/YF-B10H4-S overflow valve is a pressure control component widely used in hydraulic systems. It features a balanced piston structure and manual pressure adjustment via a handwheel, ensuring stable and reliable performance. The valve is designed to be compact, lightweight, and easy to install and maintain, with low noise levels that help reduce the operational noise of hydraulic systems.
This series of valves can operate normally at pressures up to 31.5MPa. The working medium is typically No.20 or No.30 hydraulic oil, with a normal oil temperature of 50±5℃ and a filtration precision no lower than 30 microns. The installation is flexible, with threaded and flanged valve covers able to be installed at any 90° position around the perimeter, and plate-type connections available at three 90° positions. The set pressure of the valve can be easily adjusted by rotating the pressure adjustment handwheel, with clockwise rotation increasing the pressure and counterclockwise rotation decreasing it. Different pressure adjustment ranges can be achieved by changing the spring. Additionally, the valve can be used for remote control, multi-point high and low pressure control, or unloading. The remote control port (M18×1.5) can be connected to the control oil circuit after removing the plug. The P port is the inlet, the O port is the overflow port, and the K port is the external control port.