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Principle Requirements for Filter Selection

Sep. 02, 2020

The filter is a small device that removes a small amount of solid particles in the liquid. It can protect the normal operation of the device. When the fluid enters the filter cartridge with a certain filter screen, its impurities are blocked, and the clean filtrate is discharged from the filter outlet. When cleaning is needed, just take out the detachable filter cartridge and reinstall it after treatment.

1. The inlet and outlet diameter of the filter:

In principle, the inlet and outlet diameter of the filter should not be smaller than the inlet diameter of the matching pump, and generally the same as the inlet pipe diameter.

2. Nominal pressure selection:

Determine the pressure level of the filter according to the highest pressure that may appear in the filter line.

3. Selection of the number of holes:

The selection of the number of holes in the Wire Mesh Strainers mainly considers the particle size of the impurities to be intercepted, which is determined according to the process requirements of the media. For the particle size that can be intercepted by various specifications of screens, check the following table "Filter Specifications".

4. Filter material:

The material of the filter is generally the same as the material of the connected process pipeline. For different service conditions, you can consider choosing a filter made of cast iron, carbon steel, low alloy steel or stainless steel.

5. Calculation of filter resistance loss

The water filter has a pressure loss of 0.52~1.2kpa under the general calculation of the rated flow rate.

Filter application

1. Stainless steel filter

Stainless steel filters are widely used in pipelines of steam, air, water, oil, and other media; to protect various equipment, water pumps, valves, etc. of the pipeline system; to avoid blockage caused by impurities such as rust and welding ballast in the pipeline And damage. The stainless steel filter has strong dirt resistance, convenient sewage discharge, large circulation area, small pressure loss, simple structure, small volume and light weight. The filter screen is made of stainless steel, which has strong corrosion resistance and long service life.

2.Y type filter

Y-strainer filters is an indispensable filter device in the pipeline system for conveying media. Y-strainers are usually installed at the inlet of pressure reducing valves, pressure relief valves, fixed water level valves or other equipment to Remove impurities in the medium to protect the normal use of valves and equipment. The Y-type filter has the characteristics of advanced structure, low resistance and convenient sewage discharge.

Wire Mesh Strainers

Wire Mesh Strainers

3. Y-type rod telescopic filter

The Y-type pull rod telescopic filter adopts a new design. The Y-type filter is combined with the expansion joint. The structure is simple and easy to use. It solves the defect of inconvenient installation on the fixed pipeline caused by the different lengths between the flanges of various standard products. Tie rod telescopic filters are mainly used for water supply and drainage piping in high-rise buildings, multi-storey buildings or factories. They are usually installed at the inlet end of pressure reducing valves, pressure relief valves, fixed water level valves or other major equipment. Cut off the pipeline debris or install and disassemble to ensure the normal use of valves or equipment.

4. Basket filter

The basket filter removes small equipment containing a small amount of solids in the liquid, and can protect the normal operation of compressors, pumps and other equipment and meters; it is also a small equipment to improve product purity and purify gas. Therefore, basket filters are widely used in petroleum, chemical, chemical fiber, medicine, food and other industries. The basket filter consists of a shell, a drain cover, a filter element, a filter screen, and bolts.

5.T type filter

T-type filters are widely used in the pipelines of steam, air, water, oil and other media to protect various equipment on the pipeline system, such as water pumps, valves, etc., from rust, welding slag and other debris in the pipeline To block and damage the pipeline. The T-type filter produced by Shanghai Rimei Valve Manufacturing Co., Ltd. has the characteristics of strong anti-fouling performance, convenient sewage discharge, large circulation area, small pressure loss, simple structure, and small size; the filter screen of the T-type filter is made of stainless steel, It has strong corrosion resistance and long service life; T-type filter is also divided into direct flow and baffle type. The density of the filter screen is 10 mesh-120 mesh, and the temperature is 0 ~ 450 ℃, which can be selected according to user needs.


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