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.

水力控制閥是利用管網中水的壓力控制閥門的開啟關閉及開度大小的閥門，是一種既省人力，又節約能源的自動閥門。廣泛地應用于水力灌溉高層建筑消防系統市政給排水電力等給水管網系統。它所具有的功能有自動控制水位減壓泄壓持壓調節止回消除水錘開關等多種功能。還可以根據不同的需要，改變附設管路及先導閥，達到所需要的功能。

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.

根據所使用的特定類型，流量控制閥可在液壓流量系統中發揮許多不同的功能。流量控制閥*常見的用途之一是調整系統中電動機或氣缸的速度。流量控制閥能夠通過影響流量來影響系統中任何給定點的能量傳輸速率。

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.

降低或增加系統壓力的能力有許多好處。系統操作員可以使用流量控制閥快速減壓并快速更換配件。它們還用于其它一些應用中，例如淋浴，水龍頭和草坪澆水系統，以輕松減少水的消耗量，而不會影響整體系統性能。流量控制閥還以其可靠性而著稱，由于其設計不易堵塞，因此通常具有較長的使用壽命。

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.

由于這些靈活的性能參數，流量控制閥已廣泛應用于物料搬運，食品加工以及自動化工廠和倉庫設備中。

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

量控制閥工作原理：

Working principle of a flow control valve:

當閥門從進口端給水時，水流過針閥進入主閥控制室，并經過導閥球閥流出主閥控制室到出口，此時主閥處于全開或浮動狀態。調節主閥頂部的流量調節器，可為主閥設定一定開度。調節針型閥開度和調節導閥彈簧壓力，即可使主閥開度保持在設定開度，并在壓力變化時導閥進行自動調節，保持流量不變。

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.

二流量控制閥特點：

Characteristics of flow control valve II:

閥體采用全通道流線型設計，流體阻力小，流量大。

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

體蓋活塞缸連接處由密封墊和密封環雙重密封，無外漏。

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

閥體活塞缸活塞雙重導向，動作平穩可靠。

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

全不銹鋼活塞缸整體鑄造活塞NBR密封環，延長使用壽命。

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

引進國外技術的可拆卸閥座，結構巧妙構思新奇方便維修更換。

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

帶導流孔的活塞缸，適當增加阻尼，使得活塞運動更趨于平穩。

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

三流量控制閥安裝：

Installation of three flow control valves:

主閥較好的安裝方式是安裝在水平管道上，閥蓋朝上。安裝前應清除管道內的雜物。

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.

要注意主閥閥體外水流標示箭頭的方向，箭頭所指方向為介質流動的方向，遵循方向安裝。安裝后應確保沒有管路應力作用在閥體及閥內部件上。

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.

四流量控制閥的維護：

Maintenance of four flow control valves:

水力控制閥是一種利用水自潤式閥體，無需另加機油潤滑，如遇到主閥內部零件損壞時，按下列指示進行拆卸。主閥內件一般易損壞的是膜片和密封墊，其他部件為金屬甚少損壞。

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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