Principle requirements for filter selection

Principle requirements for filter selection

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

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, which is generally the same as the diameter of the inlet pipeline.

2. Nominal pressure selection:

Determine the pressure rating of the filter according to the highest possible pressure in the filter line.

3. Selection of the number of holes:

The selection of filter pore mesh mainly considers the particle size of impurities to be intercepted, which is determined according to the process requirements of the medium process. For the particle size that can be intercepted by wire meshes of various specifications, please refer to the 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, the filter of cast iron, carbon steel, low alloy steel or stainless steel can be considered.

5. Calculation of filter resistance loss

For water filters, under the general calculation of rated flow rate, the pressure loss is 0.52 ~ 1.2kpa.

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, pumps, valves, etc. in 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 anti-fouling property, convenient sewage discharge, large flow area, small pressure loss, simple structure, small volume and light weight. The filter material is stainless steel, which has strong corrosion resistance and long service life.

2. Y-type filter

Y-type filter is an indispensable filter device in the pipeline system for conveying medium. Y-type filter is usually installed at the inlet end of pressure reducing valve, pressure relief valve, fixed water level valve 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, small resistance and convenient sewage discharge.

3.Y-type tie rod telescopic filter

The Y-type tie-rod telescopic filter adopts a new design, which combines the Y-type filter with the expansion joint. The structure is simple and the use is convenient. The tie rod telescopic filter is mainly used for water supply and drainage piping in high-rise buildings, multi-storey buildings or factories. Remove debris from the pipeline or install and disassemble to ensure the normal use of valves or equipment.

4. Basket filter

The basket filter is a small equipment that removes a small amount of solids in the liquid, which can protect the compressor, pump and other equipment and instruments from working normally; 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 is composed of a shell, a sewage cover, a filter element, a filter screen, and a bolt.

5.T-type filter

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