The hand brush filter is a semi-automatic cleaning filter. The built-in brush and brush holder of the filter screen are used to brush the dirt, impurities and other particles on the filter screen, and then discharged through the blowdown valve. The utility model is characterized in that the cleaning can be carried out during the working process of the filter without cutting off the flow and affecting the normal operation of the equipment.

Working principle and type selection of hand brush filter

Selection principle of hand brush filter

1. Inlet and outlet diameter:

In principle, the inlet and outlet diameter of the filter shall not be less than the inlet diameter of the matched pump, which is generally consistent with the diameter of the inlet pipeline.

2. Nominal pressure:

Determine the pressure level of the filter according to the possible ≤ pressure of the filter pipeline.

3. Selection of hole number:

It mainly considers the particle size of impurities to be intercepted, which is determined according to the process requirements of medium process. The particle size that can be intercepted by various specifications of screen can be found in the following table "screen specifications".

4. Filter material:

The material of the filter is generally the same as that of the connected process pipeline. For different service conditions, cast iron, carbon steel, low alloy steel or stainless steel filters can be considered.

5. Filter resistance loss calculation

The pressure loss of water filter is 0.52 ~ 1.2kp under the general calculated rated flow rate