Flow control valve is a regulator that uses the force of water to control the outlet flow at a set point. When the inlet pressure fluctuates, the outlet pressure remains unchanged, and is commonly used in water supply pipelines where flow needs to be controlled. Hydraulic control valve is a general term, which is a type of automatic control valve composed of a main valve and its external needle valve guide valve. The working state of hydraulic control valves is generally in the commonly used normally open floating state, mainly relying on the adjustment between the main valve and the needle valve or guide valve to control the water flow state.

水力控制阀是利用管网中水的压力控制阀门的开启关闭及开度大小的阀门，是一种既省人力，又节约能源的自动阀门。广泛地应用于水力灌溉高层建筑消防系统市政给排水电力等给水管网系统。它所具有的功能有自动控制水位减压泄压持压调节止回水锤开关等多种功能。还可以根据不同的需要，改变附设管路及先导阀，达到所需要的功能。

Hydraulic control valve is a valve that uses the pressure of water in the pipeline network to control the opening, closing, and opening size of the valve. It is an automatic valve that saves both manpower and energy. Widely used in hydraulic irrigation, high-rise building fire protection systems, municipal water supply, drainage, and power supply network systems. It has various functions such as automatic control of water level, pressure reduction, pressure relief, pressure holding adjustment, check and elimination of water hammer switch. You can also change the attached pipelines and pilot valves according to different needs to achieve the required functions.

根据所使用的特定类型，流量控制阀可在液压流量系统中发挥许多不同的功能。流量控制阀*常见的用途之一是调整系统中电动机或气缸的速度。流量控制阀能够通过影响流量来影响系统中任何给定点的能量传输速率。

Depending on the specific type used, flow control valves can perform many different functions in hydraulic flow systems. One of the common uses of flow control valves is to adjust the speed of electric motors or cylinders in the system. The flow control valve can affect the energy transfer rate at any given point in the system by affecting the flow rate.

降低或增加系统压力的能力有许多好处。系统操作员可以使用流量控制阀快速减压并快速更换配件。它们还用于其它一些应用中，例如淋浴，水龙头和草坪浇水系统，以轻松减少水的消耗量，而不会影响整体系统性能。流量控制阀还以其可靠性而著称，由于其设计不易堵塞，因此通常具有较长的使用寿命。

The ability to reduce or increase system pressure has many benefits. The system operator can use a flow control valve to quickly reduce pressure and replace accessories. They are also used in other applications, such as showers, faucets, and lawn watering systems, to easily reduce water consumption without affecting overall system performance. Flow control valves are also known for their reliability, and due to their design that is not easily clogged, they typically have a longer service life.

由于这些灵活的性能参数，流量控制阀已广泛应用于物料搬运，食品加工以及自动化工厂和仓库设备中。

Due to these flexible performance parameters, flow control valves have been widely used in material handling, food processing, and automation factory and warehouse equipment.

量控制阀工作原理：

Working principle of a flow control valve:

当阀门从进口端给水时，水流过针阀进入主阀控制室，并经过导阀球阀流出主阀控制室到出口，此时主阀处于全开或浮动状态。调节主阀顶部的流量调节器，可为主阀设定一定开度。调节针型阀开度和调节导阀弹簧压力，即可使主阀开度保持在设定开度，并在压力变化时导阀进行自动调节，保持流量不变。

When the valve supplies water from the inlet end, the water flows through the needle valve into the main valve control room and flows out of the main valve control room to the outlet through the pilot valve ball valve. At this time, the main valve is in a fully open or floating state. Adjust the flow regulator at the top of the main valve to set a certain opening for the main valve. By adjusting the opening of the needle valve and adjusting the pressure of the guide valve spring, the main valve can be maintained at the set opening, and the guide valve automatically adjusts when the pressure changes to maintain the flow rate unchanged.

二流量控制阀特点：

Characteristics of flow control valve II:

阀体采用全通道流线型设计，流体阻力小，流量大。

The valve body adopts a full channel streamline design, with low fluid resistance and high flow rate.

体盖活塞缸连接处由密封垫和密封环双重密封，无外漏。

The connection of the body cover piston cylinder is double sealed by a sealing gasket and a sealing ring, without external leakage.

阀体活塞缸活塞双重导向，动作平稳可靠。

The valve body, piston cylinder, and piston are double guided, ensuring smooth and reliable operation.

全不锈钢活塞缸整体铸造活塞NBR密封环，延长使用寿命。

The entire stainless steel piston cylinder is cast with NBR sealing rings, extending its service life.

引进国外技术的可拆卸阀座，结构巧妙构思新奇方便维修更换。

The detachable valve seat with imported foreign technology has a cleverly designed and novel structure, which is convenient for maintenance and replacement.

带导流孔的活塞缸，适当增加阻尼，使得活塞运动更趋于平稳。

A piston cylinder with a guide hole, with an appropriate increase in damping, makes the piston movement more stable.

三流量控制阀安装：

Installation of three flow control valves:

主阀较好的安装方式是安装在水平管道上，阀盖朝上。安装前应管道内的杂物。

A better installation method for the main valve is to install it on a horizontal pipeline with the valve cover facing upwards. Before installation, debris inside the pipeline should be removed.

要注意主阀阀体外水流标示箭头的方向，箭头所指方向为介质流动的方向，遵循方向安装。安装后应确保没有管路应力作用在阀体及阀内部件上。

Pay attention to the direction of the arrow on the water flow indicator outside the main valve body. The direction indicated by the arrow is the direction of medium flow, and follow the installation direction. After installation, it should be ensured that there is no pipeline stress acting on the valve body and internal components.

四流量控制阀的维护：

Maintenance of four flow control valves:

水力控制阀是一种利用水自润式阀体，无需另加机油润滑，如遇到主阀内部零件损坏时，按下列指示进行拆卸。主阀内件一般易损坏的是膜片和密封垫，其他部件为金属甚少损坏。

Hydraulic control valve is a type of water lubricated valve body that does not require additional oil lubrication. If internal parts of the main valve are damaged, disassemble them according to the following instructions. The internal components of the main valve are generally easily damaged by the diaphragm and sealing gasket, while other components are rarely damaged by metal.

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