The bag filter is easy to operate. When installing, just install the filter bag in the filter cartridge, check whether the O-ring is in good condition, and then tighten the filter cartridge cover ring bolt to put it into operation. After the pump is started, the pressure gauge on the filter rises slightly, and the initial pressure is about 0.05MPa. With the extension of the use time, the filter residue in the cylinder gradually increases. When the pressure reaches 0.4MPa, the cylinder cover should be stopped and the residue of the filter bag should be checked. The replaceable filter bag can be used continuously (the filter bag can be reused by cleaning).

In the production, there are several things to be aware of when using the bag filter to ensure the normal use and service life of the bag filter.

First, the filtration system should always check the pressure difference between the inlet and outlet. When the pressure difference of the bag filter reaches 0.05-0.1Mpa, the filter bag should be replaced in time to avoid the pressure difference is too large and the filter bag is broken and the support net is damaged.

Second, do not open the cover under the pressure of the bag filter, otherwise the remaining liquid may be ejected, causing liquid loss and personal injury. Therefore, please strictly follow the sequence below:

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

2. Confirm that the pipe connected to the exhaust valve has been connected to the safety or suction port (except when filtering toxic and corrosive liquids), then open the exhaust valve to prevent the liquid from causing damage to the workers and the surrounding environment. Pollution.

3. Check the pressure gauge to determine that the internal pressure is 0. At this time, the bag filter should be separated from the piping system.

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

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

Third, replace the filter bag

1. Bag filter bags are made of fine fibers, which are less hydrophilic. The surface of the fiber is not wetted by water, so as with other filter elements that use the same material, it is wetted with other liquids with a lower surface tension before use. Before installation, you must immerse the filter bag in the pre-wetting solution that matches the filtered liquid for a few minutes.

2. Open the top cover of the bag filter.

3. Stabilize the top cover and carefully remove the filter bag.

4. Put in a new filter bag.

Fourth, monitoring the quality of filtration

When the liquid input pressure is stable, the filtration quality is closely related to the pressure difference in the filter bag. If the pressure difference is too large, the filter pore size of the filter bag is blocked and the filtration speed is lowered. Therefore, we recommend that when the bag filter starts working, the pressure difference should be checked regularly, and the pressure difference displayed by the front and rear pressure gauges should be used to determine the time to replace the filter bag. Generally, the filter bag can withstand a pressure of 0.5-1Kg/cm2 (0.05). -0.1Mpa), when the pressure difference reaches this interval, the filter bag should be replaced in time to avoid the filter bag rupture and affect the filtration effect.

If the pressure differential drops suddenly, stop the filtration immediately and check for leaks.

Five, pressurized discharge residual liquid

When filtering high-viscosity liquids, compressed air can be introduced into the exhaust valve to accelerate the discharge of residual liquid and shorten the waiting time. Please note: The air used for pressurized discharge must be stable and the pressure should not exceed the working pressure of the bag filter.