Stainless steel sintered filter element-Lvyuan

The stainless steel sintered felt filter element is mainly made of stainless steel fiber sintered felt and stainless steel woven mesh through the folding process. The stainless steel fiber sintered felt can be made into a multi-layer structure with a pore size ranging from coarse to fine. It has the characteristics of high porosity and high dirt holding capacity. The stainless steel woven mesh is woven from stainless steel wires of different diameters. The filter element made has the characteristics of good strength, not easy to fall off, easy to clean, high temperature resistance and economical use.

The main filter material of Lvyuan stainless steel water cartridge filter uses 304, 304L, 316, 316L stainless steel fiber sintered felt and stainless steel woven mesh as the main filter medium. Material; stainless steel woven mesh is woven from stainless steel wire.

characteristic:
: 1. The stainless steel precision filter element has high porosity, good air permeability, low resistance, and low pressure difference;

2. After the stainless steel precision filter element is folded, the filter area is large and the dirt holding capacity is large;

3. Stainless steel precision filter element is resistant to high temperature and corrosion, suitable for filtering high viscous liquids;

4. Good regeneration performance, can be used repeatedly after chemical cleaning, high temperature and ultrasonic cleaning;

, All stainless steel structure, wide chemical compatibility;

Main technical parameters: 1. Maximum working temperature of stainless steel precision filter element: ≤500℃

2. Filtration accuracy: 1-200um

3. Working temperature: 0.1-30MPa

4. Filter element specifications: 5-40 inches (can be made according to user requirements)

5.Interface form: threaded interface, 222, 226, 220, etc.

Stainless steel folding filter cleaning method:

2. Cleaning method of stainless steel folding filter element:

1. Generally choose backwashing on the production line: first turn off the original liquid and filtrate pipeline switches, rinse with bacteria-free water, enter from the original outlet, and discharge from the inlet or the lower part of the filter. Backwashing must be under pressure but not excessive. Large, generally around 5 kg.

2. Remove the stainless steel folding filter element and place it in the cleaning solution for cleaning, first soak in the repeated cleaning.

Cleaning fluid is generally available:

A. Sodium hydroxide, 0.1NNaOH

B.1-2% citric acid water solvent or 0.1N oxalic acid solvent, 0.1N hydrochloric acid solvent.

C. When cleaning with enzyme solvents and other solvents, it is generally best to control the temperature at 30-40 degrees.

Precautions during cleaning: High-temperature disinfection must be done after the filter element is cleaned with high protein content of the filtered stock solution, such as draft beer and nutrient solution, to prevent the high-temperature aggregation of protein from clogging the membrane pores.

2. Installation method of stainless steel folding filter element:

1. When installing the plug-in filter element, the O-ring should be wetted in the clean parallel filtrate to reduce the friction during insertion. And it is required to insert it to the end to ensure that both O-rings have a sealing effect.

2. When installing the snap-in filter element, it needs to be rotated and positioned clockwise.

3. If the filter has a pressure plate, press the pressure plate on the rocker and gently compress the spring on the pressure plate. If the spring is too tight, the filter element will be twisted and deformed and affect the filtering accuracy.

4. When filtering liquid, you should first turn on the exhaust switch on the shell to empty the gas in the filter cartridge and fill the filter cartridge with liquid, otherwise it will affect the flow rate.

5. The fluid filter will produce a pressure drop due to resistance. In order to overcome the resistance, there must be sufficient working pressure. In order to prevent the filter element from being impacted by a large flow, the valve should be opened slowly.


Standards and requirements for the production of stainless steel filter elements


The sintering and heat treatment process of the stainless steel filter element includes charging, vacuuming, degassing, heating, argon filling, heat preservation, cooling and discharging. The stainless steel filter element puts the blank into a tray or a data box for sintering. The pallet or data box is made of high temperature resistant materials, such as molybdenum sheets.

Heat-resistant steel or graphite to avoid deformation during sintering. It is required that there is no direct touch between the billets during the charging process to avoid the billets from adhering to each other during the sintering process. Molybdenum plates can also be used to separate the blanks from each other. Then push the data tray or box into the furnace, close the lid and seal it.

The stainless steel filter element vacuum unit removes the air in the sintering chamber and the gas attached to the blank. After the vacuum pump is sent to the high vacuum pump group, the high vacuum pump is turned on. The general requirement of two-stage vacuum pumping to 1.3X10-ZPa.

The stainless steel filter element is electrically heated and continuously pumped at a temperature of 400 to 500°C. This method can eliminate the residual stress of the briquette, and gradually differentiate and evaporate the adsorbed gas on the surface of the briquette and the organic media such as lubricant and granulator added to the briquette.

After the stainless steel filter element is degassed, the furnace is heated to the sintering temperature. Regarding different materials, the sintering temperature is also different. The sintering temperature should be accurately measured and controlled. Too high temperature will make the product soft and deformed, the particles will be rough and even useless. When the sintering temperature is too low, the compaction speed of the green compact becomes slow, the sintering time is extended, the equipment utilization rate decreases, and the product function cannot meet the requirements.

As the temperature of the stainless steel filter element increases, the gas removal from the blank tends to be completed under vacuum. Regarding sintering in the maintenance atmosphere, argon should be filled into the sintering chamber to complete the sintering in the maintenance atmosphere. After filling with argon, the vacuum unit is stopped to reduce power consumption.

The stainless steel filter element stays at the sintering temperature for a period of time, so that the compact during the sintering process is completely densified, and the pores given to the crystal are shortened, eliminating and changing the time of satisfaction. The length of the holding time depends on the scale and scale of the sintered product. The appropriate sintering temperature and persistence time can be confirmed by measuring the density and magnetic properties of the product.


Classification requirements for stainless steel sintered filter elements


Classification requirements for stainless steel sintered filter elements. With Hanko Filtering, every day is a new day, and the troubles will not stay overnight. Greet a new day with optimism and enthusiasm every morning. Even if someone slapped a big mouth yesterday. Application range of stainless steel sintered filter element: filter, filter assembly product (can be referred to as filter), mainly used in rubber, plastic industry, grain and oil screening, petroleum, oil refining, chemical industry, light industry, medicine, metallurgy, machinery, shipbuilding , Distillation, absorption, evaporation, filtration and other processes in industries such as automobiles and tractors to eliminate mist and liquid entrained in steam or gas, and used as air filters in automobiles. The stainless steel sintered filter element uses CNC equipment and lathes to create molds for the product. After the mold is formed, the production efficiency is high. The size and shape can be produced by customers with drawings or samples. The shape can be divided into many kinds, such as concave-convex shape, upper mouth abduction, circle, ring, rectangle, oval, crescent, semicircle, triangle and other special-shaped filters. The selectivity of the stainless steel sintered filter element is mainly based on the characteristics of the screen, material, wire diameter, mesh, length of service life, and price. These elements of the stainless steel sintered filter element have an inter-influence relationship. The thickness of the wire diameter directly affects the screening rate, service life and price of the screen.


Under normal circumstances, the number of meshes is not used as the unit of measurement of filtration accuracy in the world, but micrometers and millimeters are used as the unit of filtration accuracy. Then the conversion method between them is: 1 mm = 1000 microns. Mesh: refers to the number of holes per inch. The size of the mesh is the large size through which the material can pass, usually in millimeters. For example, a stainless steel mesh with 20 mesh and 50 wires has a wire diameter of 0.5 mm, so the hole diameter is 0.77 mm, which is 770 microns. Stainless steel sintered filter element is a weave of stainless steel wire mesh. The reason why it is called the stainless steel sintered filter element is because of its different warp and weft wire diameters and different meshes. Use a reasonable combination of silk warp and mesh to achieve a filtration density that cannot be achieved by square mesh. Therefore, the mat meshes are all finely filtered stainless steel sintered filter elements, but generally the diameter of the warp wire is larger than the diameter of the weft wire. The contrast weave is called contrast because the weft is much thicker than the warp. Chemical fiber spinning machines. Leather and non-woven equipment. Plastic granulator spinnerets and components often use a filter material-filter mesh. There are only two commonly used filter mesh materials: one is stainless steel, and general purchasers choose 201 to save costs; the other is black silk cloth mat type mesh,



Stainless steel sintered filter element performance: stainless steel sintered filter element can withstand general acid, alkali and organic corrosion, especially suitable for sulfur gas filtration, high strength, good toughness, suitable for high-pressure environment, welding, convenient loading and unloading, stable hole shape, uniform distribution, accurate * **Stable filtration performance and good regeneration performance. After repeated cleaning and regeneration, the filtration performance returned to 90. The stainless steel sintered filter element has various apertures and filtration precisions, cross holes, high temperature resistance, quenching resistance and heat resistance. preservative. Suitable for various corrosive media such as acid and alkali. Mainly used in the filtration of petrochemical and oilfield pipelines. Fuel filters for fueling equipment, engineering machinery and equipment. Filtration of water treatment equipment. Pharmaceutical and food processing. Used for chemical liquid filtration, with an accuracy of 100μm. The material of the filter cartridge is a stainless steel round microporous mesh with a rated flow rate. The heavy oil combustion system is pre-dehydrated with stainless steel woven mesh and stainless steel filter element.


The stainless steel sintered filter element filters the air entering the engine, as well as dust and particles, but the natural air entering the engine. The stainless steel sintered filter element filters air-conditioning air, such as when you turn on the air conditioner or external circulation, to filter dust and pollen.　The two are completely different. If the air conditioner filter element is dirty, you can wash it and blow it yourself, and replace it every 10,000 yuan. The air filter element can only be replaced by 5000 or more than 10000 to protect the engine. Both are 30-50 yuan, not expensive. The stainless steel sintered filter element separates solid particles in liquid or gas, or makes different material components fully contact, speeds up the reaction time, and protects the normal operation of the equipment or the cleanness of the air. When the fluid enters the filter element with a certain specification filter, its impurities Is blocked, and clean fluid flows out through the filter element. The stainless steel sintered filter element makes the liquid (including oil, water, etc.) clean the contaminated liquid to the state required for production and life, which is to make the liquid reach a certain degree of cleanliness. The stainless steel sintered filter element makes the polluted air clean to the state required for production and life, that is, to make the air reach a certain degree of cleanliness.



The inspection of the weaving accuracy of the stainless steel sintered filter element is divided into 3 levels: first-level accuracy, and the limit deviation of the mesh cannot exceed 6. The secondary accuracy does not exceed 9. The three-level accuracy does not exceed 12. Stainless steel sintered filter element is mainly used for the inspection of the arithmetic average of the mesh and the inspection of the size of the large mesh. 　　 Inspection of the quality of the woven stainless steel sintered filter element. It is impossible for the metal wire mesh to have manufacturing defects during the production process. Generally, it is delivered in rolls. The metal mesh is not allowed to have major defects, a small number of important defects are allowed, and a certain number of general defects are allowed. 　　 The following conditions on the weaving process of the stainless steel sintered filter element are major defects: the warp and weft are not firmly interwoven, and the fingers are rubbed up and down with both hands. The silk has obvious loosening and displacement phenomenon. The curling is serious, the mesh is greater than or equal to 0.18mm, and the natural crimping diameter of the 1m fourdrinier is less than 80mm. If the mesh is less than 0.18mm, and the natural bending diameter of the 1m long mesh surface is less than 60mm, it should be judged as unqualified.


The structure of the stainless steel metal sintered mesh filter element is generally divided into five layers, which are divided into four parts: the protective layer, the filter layer, the separation layer, and the support plate layer. This kind of filter material has both uniform and stable filtration accuracy and high strength and Rigidity is an ideal filter material for occasions that require high compressive strength and uniform filter particle size. Because its filtration mechanism is surface filtration and the mesh channels are smooth, it has excellent backwash regeneration performance and can be used repeatedly for a long time. It is especially suitable for continuous and automated operation processes. It is incomparable to any filter material. of.

The stainless steel sintered mesh filter element does not use binders in the production process and has a wide range of chemical compatibility. Can be used for solvent or high temperature media filtration. The structure of the filter layer of the filter element is tight on the outside and loose on the inside, with a gradient distribution of pore sizes, making it easier to backwash and discharge slag compared to other filter elements. Suitable for making large-scale automatic equipment. All stainless steel structure, good overall regeneration performance, can be used repeatedly after chemical cleaning, high temperature and ultrasonic cleaning.

The stainless steel sintered mesh filter element is an order-based production filter element, which can be produced in various lengths and specifications. You can consult the manufacturer according to your needs.

The prospect of stainless steel filter

As a new type of stainless steel filter material on the market, stainless steel filter has many excellent performances. It is being widely used in various fields and occupies a place in the high-end market. It is becoming more and more demanding in terms of quality requirements. In the future, stainless steel filter materials have a good market prospect.

The filter materials that we see more in our lives are generally stainless steel, pp cotton, ceramics, etc. Of course, I will not blindly praise myself just because I sell stainless steel filters. I will remain neutral and analyze the advantages and disadvantages of these three from the perspective of the customer. First of all, the pp cotton filter is cheap, but it can only filter larger solid particles, and has a short service life and needs to be replaced frequently. The relative filtration accuracy of the ceramic filter will be a little higher at about 20-200 microns, the price is more expensive than pp cotton, the material is environmentally friendly, and overall it is quite good. The hardness of the stainless steel filter will be greater and the service life will be longer. It can also be used normally in a high temperature environment, and the filtering accuracy is between 0.1 and 120 microns. The disadvantage is that it is expensive. So in general, stainless steel filters are suitable for the positioning of high-end products, which can help your products to a higher level.

As a new type of filter material in the market, stainless steel has excellent characteristics and good prospects. It has derived stainless steel powder filter materials and stainless steel mesh sintered filter materials. Today we will talk in detail about the uses of stainless steel filter materials in daily life.

Stainless steel filters are divided into powder sintering and mesh sintering. The stainless steel filter has relatively high filtration accuracy, relatively large mechanical strength, and high temperature resistance, so it can be used in gas detector probes and sensor probes as explosion-proof and dust-proof. It has good air permeability and can also be used as a fire barrier to prevent flame backflow from causing an explosion. With strong pressure resistance and uniform surface pores, it can be used for the uniform distribution of gas and liquid flow, and can also play a role of buffer throttling, and can form flow diffusion, shrinkage, and uniform distribution through different casting methods. To remove impurities and bacteria from high-temperature gas, the commonly used solid and liquid gas filtration accuracy can be achieved within 0.1 micron and 300 microns.