Filter selection principle requirements
Filter is a small device to remove a small amount of solid particles in the liquid, which can protect the normal work of the equipment, when the fluid enters the filter cartridge with a certain specification filter screen, the impurities are blocked, and the clean filtrate is discharged by the filter outlet, when it needs to be cleaned, as long as the detachable filter cartridge is removed and re-loaded after treatment.
1, filter inlet and outlet diameter:
In principle, the inlet and outlet diameter of the filter should not be smaller than the inlet diameter of the matching pump, generally consistent with the inlet pipe caliber.
2, nominal pressure selection:
Determine the pressure level of the filter according to the highest possible pressure in the filter line.
3, the selection of the number of holes:
The selection of filter hole number mainly considers the particle size of the impurities to be intercepted, according to the process requirements of the medium process. The particle size of various specifications can be intercepted by the screen check the table "filter specifications".
4, filter material:
The material of the filter is generally the same as the material of the connected process pipe, and the filter of cast iron, carbon steel, low alloy steel or stainless steel can be considered for different service conditions.
5, filter resistance loss calculation
Water filter, in 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 steam, air, water, oil, and other media pipelines; Protect all kinds of equipment, pumps, valves, etc.; Free from rust, welding and other impurities in the pipeline, caused by blockage and damage. Stainless steel filter has strong pollution resistance, convenient sewage discharge, large circulation area, small pressure loss, simple structure, small volume, light weight. Filter material is stainless steel, strong corrosion resistance, long service life.
2. Y-type filter
Y-type filter is an indispensable filter device in the pipeline system of conveying media. Y-type filter is usually installed at the inlet end of pressure reducing valve, pressure relief valve, fixed level valve or other equipment to remove impurities in the medium to protect the normal use of valves and equipment. Y-type filter has the characteristics of advanced structure, low resistance, convenient blowdown and so on.
3. Y-type drag rod telescopic filter
Y-type telescopic filter adopts a new design, the combination of Y-type filter and telescopic joint, simple structure, easy to use, to solve a variety of different standard products flange length caused by different fixed pipe installation inconvenience defects, telescopic filter is mainly used in high-rise construction, multi-storey buildings or factories in the water supply and drainage piping. Usually installed in the pressure reducing valve, pressure relief valve, fixed level valve or other main equipment inlet end, the installation of the rod telescopic filter is easy to cut the pipeline debris or installation and disassembly 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, which can protect the normal operation of compressors, pumps and other equipment and instruments; It is also a small equipment to improve product purity and purify gas. Therefore, the basket filter is widely used in petroleum, chemical, chemical fiber, medicine, food and other industries. The basket filter is composed of a shell, a blowdown cover, a filter element, a filter screen, a bolt, etc.
5. T-type filter
T-type filter is widely used in the pipeline of steam, air, water, oil and other media, to protect various equipment on the pipeline system, such as pumps, valves, etc., from the rust in the pipeline, welding slag and other debris to bring blockage and damage to the pipeline. The T-type filter produced by Shanghai Rimei Valve Manufacturing Co., Ltd. has the characteristics of strong anti-fouling performance, convenient blowdown, large circulation area, small pressure loss, simple structure, small volume and so on. The filter material of T-type filter is stainless steel, strong corrosion resistance, long service life; T-type filter is also divided into straight flow and fold flow, the density of the filter screen is 10-120 mesh, the temperature is 0~450℃, can be selected according to user needs.
