一、工作原理：壓力平衡的智慧調(diào)控?

1、 Working principle: Intelligent regulation of pressure balance

減壓閥的工作原理基于力的平衡和反饋調(diào)節(jié)機(jī)制。其內(nèi)部核心部件包括閥芯、彈簧、膜片（或活塞）等。以常見的先導(dǎo)式減壓閥為例，當(dāng)介質(zhì)流入閥門時，壓力作用于膜片下方，同時彈簧產(chǎn)生向上的彈力。在初始狀態(tài)下，彈簧力大于介質(zhì)壓力，閥芯處于關(guān)閉或部分開啟狀態(tài)。?

The working principle of a pressure reducing valve is based on force balance and feedback regulation mechanism. Its internal core components include valve core, spring, diaphragm (or piston), etc. Taking the common pilot operated pressure reducing valve as an example, when the medium flows into the valve, the pressure acts under the diaphragm, and the spring generates an upward elastic force. In the initial state, the spring force is greater than the medium pressure, and the valve core is in a closed or partially open state. ?

隨著介質(zhì)壓力升高，膜片下方壓力增大，當(dāng)超過彈簧設(shè)定的壓力值時，膜片向上變形，帶動閥芯上移，閥門開度增大，更多介質(zhì)通過閥門流出，使下游壓力降低。同時，下游壓力通過反饋通道作用于膜片，與彈簧力形成新的平衡，使下游壓力穩(wěn)定在設(shè)定值附近。當(dāng)下游壓力降低時，膜片在彈簧力作用下向下移動，閥芯下移，閥門開度減小，減少介質(zhì)流出，從而維持壓力穩(wěn)定。

As the pressure of the medium increases, the pressure below the diaphragm also increases. When it exceeds the pressure value set by the spring, the diaphragm deforms upward, driving the valve core to move upward and increasing the valve opening. More medium flows out through the valve, causing downstream pressure to decrease. At the same time, the downstream pressure acts on the diaphragm through the feedback channel, forming a new balance with the spring force, stabilizing the downstream pressure near the set value. When the downstream pressure decreases, the diaphragm moves downward under the action of spring force, the valve core moves downward, the valve opening decreases, and the outflow of medium is reduced, thereby maintaining pressure stability.

二、安裝要點(diǎn)：正確安裝的關(guān)鍵要素?

2、 Installation points: key elements for correct installation

1.安裝位置選擇?

1. Installation location selection

減壓閥應(yīng)安裝在水平管道上，且前后需保證一定的直管段長度，一般進(jìn)口直管段長度不小于 5 倍管徑，出口直管段長度不小于 2 倍管徑，以確保介質(zhì)流動穩(wěn)定，避免因管道渦流影響減壓效果。同時，要考慮便于操作和維護(hù)，預(yù)留足夠的空間用于調(diào)節(jié)壓力和檢修閥門 。?

The pressure reducing valve should be installed on a horizontal pipeline, and a certain length of straight pipe section should be ensured before and after. Generally, the length of the inlet straight pipe section should not be less than 5 times the pipe diameter, and the length of the outlet straight pipe section should not be less than 2 times the pipe diameter to ensure stable medium flow and avoid the impact of pipeline eddy currents on the pressure reducing effect. At the same time, consideration should be given to ease of operation and maintenance, with sufficient space reserved for pressure regulation and valve maintenance. ?

2.管道清潔?

2. Pipeline cleaning

在安裝減壓閥前，必須對管道進(jìn)行徹底清潔，清除管道內(nèi)的鐵銹、焊渣、泥沙等雜質(zhì)，防止這些雜物進(jìn)入減壓閥內(nèi)部，損壞閥芯、密封件等部件，影響閥門正常工作和使用壽命。?

Before installing the pressure reducing valve, the pipeline must be thoroughly cleaned to remove impurities such as rust, welding slag, and mud from the pipeline, to prevent these impurities from entering the interior of the pressure reducing valve, damaging components such as the valve core and seals, and affecting the normal operation and service life of the valve. ?

3.方向正確?

3. Correct direction

減壓閥上通常標(biāo)有介質(zhì)流動方向箭頭，安裝時必須確保介質(zhì)流動方向與箭頭指示方向一致。若安裝方向錯誤，不僅無法實(shí)現(xiàn)減壓功能，還可能導(dǎo)致閥門損壞或系統(tǒng)故障 。?

Pressure reducing valves are usually marked with arrows indicating the direction of medium flow. When installing, it is necessary to ensure that the direction of medium flow is consistent with the direction indicated by the arrow. If the installation direction is incorrect, not only can the pressure reduction function not be achieved, but it may also cause valve damage or system failure. ?

4.配套設(shè)施安裝?

4. Installation of supporting facilities

為便于觀察和調(diào)節(jié)壓力，減壓閥前后應(yīng)安裝壓力表；在減壓閥出口管道上可安裝安全閥，當(dāng)減壓閥出現(xiàn)故障導(dǎo)致下游壓力異常升高時，安全閥自動開啟泄壓，保障系統(tǒng)安全；此外，還可根據(jù)需要安裝旁通管道，以便在減壓閥檢修或故障時，通過旁通管道維持系統(tǒng)運(yùn)行 。?

For the convenience of observation and pressure regulation, pressure gauges should be installed before and after the pressure reducing valve; A safety valve can be installed on the outlet pipeline of the pressure reducing valve. When the pressure reducing valve malfunctions and causes an abnormal increase in downstream pressure, the safety valve will automatically open to release pressure and ensure system safety; In addition, bypass pipelines can be installed as needed to maintain system operation during pressure relief valve maintenance or malfunction. ?

三、維護(hù)與保養(yǎng)：延長使用壽命的必要措施?

3、 Maintenance and upkeep: necessary measures to extend service life

1.定期檢查?

1. Regular inspection

定期檢查減壓閥的密封性能，觀察是否有介質(zhì)泄漏現(xiàn)象；檢查壓力表讀數(shù)是否正常，確保閥門處于正常工作狀態(tài)。同時，查看閥門外觀是否有腐蝕、變形等情況，若發(fā)現(xiàn)異常及時處理 。?

Regularly check the sealing performance of the pressure reducing valve and observe whether there is any medium leakage; Check if the pressure gauge reading is normal and ensure that the valve is in normal working condition. At the same time, check the appearance of the valve for corrosion, deformation, etc. If any abnormalities are found, they should be dealt with in a timely manner. ?

2.壓力調(diào)節(jié)?

2. Pressure regulation

根據(jù)實(shí)際需求，定期對減壓閥的壓力設(shè)定值進(jìn)行檢查和調(diào)整。調(diào)整壓力時，應(yīng)緩慢旋轉(zhuǎn)調(diào)節(jié)旋鈕，避免壓力突變對系統(tǒng)造成沖擊。調(diào)節(jié)后，觀察一段時間，確保壓力穩(wěn)定在設(shè)定值附近 。?

Regularly check and adjust the pressure setting of the pressure reducing valve according to actual needs. When adjusting the pressure, the adjustment knob should be slowly rotated to avoid sudden pressure changes that may cause impact on the system. After adjustment, observe for a period of time to ensure that the pressure stabilizes near the set value. ?

3.清洗與維修?

3. Cleaning and maintenance

定期對減壓閥進(jìn)行清洗，去除內(nèi)部的雜質(zhì)和污垢，防止閥芯卡滯、密封件損壞。若發(fā)現(xiàn)閥門出現(xiàn)故障，如壓力調(diào)節(jié)失靈、泄漏嚴(yán)重等，應(yīng)及時進(jìn)行維修或更換部件。對于復(fù)雜的故障，建議由專業(yè)技術(shù)人員進(jìn)行處理，確保維修質(zhì)量 。??

Regularly clean the pressure reducing valve to remove impurities and dirt inside, to prevent valve core jamming and seal damage. If a valve malfunction is found, such as pressure regulation failure, severe leakage, etc., it should be repaired or replaced in a timely manner. For complex faults, it is recommended to have professional technicians handle them to ensure the quality of maintenance. ??

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