The bag filter is a new type of filtering system. The filter bag is supported by a metal inner net inside the filter. The liquid flows in from the inlet and flows out after being filtered by the filter bag. The impurities are intercepted in the filter bag. The filter bag can be replaced or cleaned to continue using. (Shanghai Jiucheng Bag Filter)

Two, installation

Be prepared to warn: After opening the lid, the falling lid will hurt your hands.

1. First of all, please confirm whether the accessories required for installing the bag filter system are ready:

   ①The main body of the bag filter

   ②O type sealing ring

   ③Metal inner net

   ④Filter bag

   ⑤Two pressure gauges (optional)

2. Check the O-shaped sealing ring and the O-shaped groove on the filter. If the O-shaped sealing ring is deformed, scratched or broken, or there is a problem with the joint of the O-shaped sealing ring, please replace with new parts. (Shanghai Jiucheng Bag Filter)

   When installing, please follow the steps below:

   1. Place the bag filter on the work station that needs to be filtered, and fix it after connecting the inlet and outlet flanges or pipe teeth; block the exhaust port, or configure an exhaust valve. Jacket type is connected to the heat preservation heat source.

   2. Gently put the metal inner net into the bag filter so that the neck of the inner net matches the mouth of the bag filter.

   3. Place the filter bag so that the ring opening of the filter bag coincides with the neck opening of the metal inner mesh. Note: If you are using a sewn filter bag, please fold the sewn edge of the filter bag and put it in to improve the filtering effect of the sewn filter bag.

   4. Put the O-shaped sealing ring into the O-shaped groove. The O-shaped sealing ring can not be twisted or deformed. The multi-bag filter machine buckles the filter bag pressing ring.

   5. Hold the handle of the upper cover with one hand and the other end of the upper cover with the other hand (turn the top hand wheel of the multi-bag filter), align the upper cover with the mouth of the bag filter, slowly lower it, and press it on the O-shaped seal naturally. Ring and filter bag ring mouth.

   6. After the upper cover is aligned, tighten the two diagonal lifting caps at the same time, and tighten all the lifting caps one by one (insert a short stick into the lifting ring to tighten).

   7. Close the exhaust valve installed on the top of the bag filter.

   8. Please check whether the connecting pipes are firm; whether the working pressure is within the allowable range.

   9. Open the output valve. Open the heat source inlet valve to raise the temperature of the filter to the specified temperature.

   10. Open the input valve slowly and let the liquid slowly flow into and fill the filter to prevent the liquid from suddenly impacting the filter bag and causing rupture, and then observe whether there is any leakage. If there is no leakage, you can start filtering.

 Daily use and maintenance

1. Daily use

   The working filter system needs to check the pressure difference between the inlet and outlet frequently. When the pressure difference reaches about 0.6 Mpa, the filter bag should be replaced in time to prevent the filter bag from rupturing and the support net from being damaged.

2. Correctly open the upper cover of the filtered filter

   Warning: Do not open the cover under pressure in the bag filter, otherwise the remaining liquid may spray out and cause liquid loss and personal injury.

   Therefore, please operate strictly in the following order:

   ①Close the input valve; when there is pressure at the outlet, close the output valve.

   ②After confirming that the pipe connected to the exhaust valve has been connected to a safe place or suction port (especially pay attention when filtering toxic and corrosive liquids), then open the exhaust valve to prevent the liquid from causing harm and pollution to the staff and the surrounding environment . (Shanghai Jiucheng Bag Filter)

   ③Check the pressure gauge to make sure that the internal pressure is 0. At this time, the bag filter should have been separated from the pipeline system.

   ④ If there is a drain valve, confirm that the drained liquid is connected to the recovery point and open the drain valve; when the remaining liquid in the bag filter is exhausted through the drain valve, close the drain valve. This discharge can be completed with pressurization (please refer to the pressurized discharge process).

   ⑤Unscrew the top cover and lift the top cover, the multi-bag filter needs to be rotated through a certain angle.

Third, replace the filter bag

1. The filter bag is made of fine fibers, and the hydrophilicity of these materials is relatively weak. The surface of the fiber will not be wetted by water, so like other filter elements that use the same material, they must be wetted with some other liquid with a lower surface tension before use. Before installation, you must immerse the filter bag in a pre-wet liquid that matches the filtered liquid for a few minutes.

2. Open the upper cover of the bag filter.

3. Put the upper cover firmly and take out the filter bag carefully.

4. Put in a new filter bag, please refer to the installation process. (Shanghai Jiucheng Bag Filter)