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What is the working principle and selection of basket filters?

2025-06-03

Basket filters are used on oil or other liquid pipelines to filter debris in the pipeline. The filter hole area is 2-3 times larger than the diameter pipe area. It far exceeds the filter area of Y-type and T-type filters. The filter accuracy is a filter with better accuracy among filters. The filter screen structure is different from other filter screens. Because it is shaped like a basket, it is called a blue filter.

The medium-heat mechanical basket filter is mainly composed of a pipe, a cylinder, a filter basket, a flange, a flange cover and fasteners. When installed on the pipeline, it can remove larger solid impurities in the fluid, so that the machinery and equipment (including compressors, pumps, etc.) and instruments can work and operate normally, achieving a stable process and ensuring production.

Working principle of basket filter:

When the pipeline is installed, other debris will be brought into the pipeline, and there will also be debris in the raw materials during production. When the liquid in the pipeline passes through the filter, its dirt is collected by the filter into the filter screen. When it reaches a certain level, open the shell cover to clean the filter screen.

basket filters

General principles for selecting basket filters:

1. Inlet and outlet diameters:

In principle, the inlet and outlet diameters of the filter should not be less than the inlet diameter of the matching pump, and are generally consistent with the inlet pipe diameter.

2. Nominal pressure:

Determine the pressure level of the filter according to the high pressure that may occur in the filter pipe.

3. Selection of the number of holes:

Mainly consider the particle size of impurities to be intercepted, according to the process requirements of the medium flow. The particle size that can be intercepted by various specifications of wire mesh can be found in the table "Filter Specifications" below.

Technical parameters of basket filters:

1. Suitable materials:

a. Weakly corrosive materials in chemical and petrochemical production, such as water, ammonia, oil, hydrocarbons, etc.;

b. Corrosive materials in chemical production, such as caustic soda, soda ash, concentrated and dilute sulfuric acid, carbonic acid, acetic acid, ester acid, etc.;

c. Low-temperature materials in refrigeration, such as liquid methane, liquid ammonia, liquid oxygen and various refrigerants;

d. Materials with hygiene requirements in light food and pharmaceutical production, such as beer, beverages, dairy products, grain pulp and medical supplies, etc.

2. Working temperature: -80℃—+450℃

3. Nominal diameter: DN15—DN600

4. Nominal pressure: PN1.0—5.0Mpa

5. Flange standard: HG20592-97 (can also be manufactured according to user requirements)

6. Shell material: A3, 304, 304L, 316, 316L

7. Sealing material: polytetrafluoroethylene, nitrile rubber, oil-resistant asbestos rubber

8. Manufacturing and testing standard: HGJ532-91

If you have more information you want to consult, please feel free to contact Tianjin Fuyaolai Technology Co., Ltd.!


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