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您好！根據我的搜索結果，4寸立式泡沫泵的安裝步驟如下：

1. 檢查水泵和電機的完好情況。

2. 泵安裝位置應盡可能靠近水源處。

3. 泵與底座直接安裝在水泥基礎上。

4. 將泵安放在基礎上墊高 30～40 毫米 (準備充填水泥漿之用)，然后進行校正，并穿好地腳螺栓，充填水泥砂漿，經 3～5 天水泥干涸后，重新校正，待水泥完全干涸后，擰緊地腳螺栓的螺母。

5. 安裝管路時，進、出水管路均應有各自的支承，確保泵的法蘭不會承受過大的管路重量。

6. 泵用于有吸程場合，進水管端應裝有底閥，并且進出口管路不應有過多彎道，同時水泵不得有漏水、漏氣現象存在。

7. 在進口管路上最好裝有過濾網，以防雜質進人葉輪內部。濾網的有效面積應是進水管面積的 3～4 倍，以保證液體的自由暢通。

4寸泡沫泵

Hello! According to my search results, the installation steps of the 4-inch vertical foam pump are as follows:

1. Check the integrity of the water pump and motor.

2. The pump should be installed as close to the water source as possible.

3. The pump and base are directly installed on a cement foundation.

4. Place the pump on the foundation and raise it by 30-40 millimeters (preparing to fill with cement slurry), then calibrate it, thread the anchor bolts, fill with cement mortar, and after 3-5 days of cement drying, recalibrate it. After the cement is completely dry, tighten the nuts of the anchor bolts.

When installing pipelines, both the inlet and outlet pipelines should have their own supports to ensure that the pump flange does not bear excessive pipeline weight.

6. The pump is used in situations with suction lift. The inlet pipe end should be equipped with a bottom valve, and the inlet and outlet pipelines should not have too many bends. At the same time, the pump should not have water or air leakage.

7. It is best to install a filter screen on the inlet pipeline to prevent impurities from entering the impeller. The effective area of the filter should be 3-4 times the area of the inlet pipe to ensure the free and smooth flow of the liquid.