1、將減壓閥下游閥門關閉。找到調節壓力的地方，沿順時針方向緩慢旋轉，出口壓力逐漸變大，逆時針旋轉時出口壓力變小。在調到需要的壓力值后，即可把下游閥門打開。

1. Close the downstream valve of the pressure reducing valve. Find the place to adjust the pressure and slowly rotate clockwise to gradually increase the outlet pressure. When rotating counterclockwise, the outlet pressure decreases. After adjusting to the required pressure value, the downstream valve can be opened.

2、關閉減壓閥前的閘閥后，需要開啟減壓閥后的閘閥，達到制造下游低壓環境的目的。將調節螺釘逆時針旋轉上位置(相對低出口壓力)，后關閉減壓閥后閘閥。緩慢開啟減壓閥前的閘閥直到全開。

2. After closing the gate valve in front of the pressure reducing valve, it is necessary to open the gate valve behind the pressure reducing valve to create a downstream low-pressure environment. Turn the adjustment screw counterclockwise to the upper position (relatively low outlet pressure), and then close the pressure reducing valve and gate valve. Slowly open the gate valve in front of the pressure reducing valve until it is fully open.

3、順時針慢慢旋轉調節螺釘，將出口壓力調所需要的壓力。調整好后，將螺母鎖緊，打開減壓閥后閘閥。由于減壓閥的工作原理設定，如在調整時出口壓力高于設定壓力，須從步開始重新調整，即只能從低壓向高壓調。

3. Slowly rotate the adjustment screw clockwise to adjust the outlet pressure to the desired pressure. After adjustment, tighten the nut and open the pressure reducing valve and gate valve. Due to the working principle setting of the pressure reducing valve, if the outlet pressure is higher than the set pressure during adjustment, it must be readjusted from the first step, that is, it can only be adjusted from low pressure to high pressure.

4、在設定機械泵的驅動壓力時，正確的方法是使驅動壓力高于背壓標準，這個原則適應于大多數情況。但有時為了達到機械泵的要求排量，需要將驅動壓力設定得較高一些。驅動壓力高時，不利的一面是容易對進氣閥造成磨損。如果驅動壓力高于要求值的情況下，會對進氣閥造成嚴重的磨損而必須提前更換進氣閥。

4. The correct method to set the driving pressure of a mechanical pump is to make the driving pressure higher than the back pressure standard, which is suitable for most situations. But sometimes in order to achieve the required displacement of the mechanical pump, it is necessary to set the driving pressure higher. When the driving pressure is high, the downside is that it can easily cause wear on the intake valve. If the driving pressure exceeds the required value, it will cause serious wear on the intake valve and it is necessary to replace the intake valve in advance.