Performance of stainless steel filter element

Under the nominal pressure, the air leakage rate of the stainless steel pleated filter element should not be less than 1 * 10-4pa m3 / S. If the traditional filter element is replaced by a compact test piece, the O between the filter element and the housing The ring may leak. The leakage pressure is usually five times the rated pressure of the filter element, and the maximum value is eight times. When the medium passes through the filter without installing the filter element at the rated flow rate, the pressure difference between the inlet and the outlet should be zero. If the pressure difference between the inlet and the outlet is greater than 0, when testing the pressure difference of the filter element, the pressure difference of the housing under the corresponding flow rate should be subtracted.

In order to judge the performance of the stainless steel fiber felt folded filter element, we mainly consider the first bubble point, differential pressure flow characteristics, accuracy and pollution capacity, strength and other indicators.
1. The pressure value of the first bubble point should not be lower than 90% of the pressure value of the first bubble point of the filter material.
2. Pressure difference flow characteristics: When the oil temperature is about 30℃, the rated pressure difference is 0.15Mpa, the fluid is standard air, and the rated pressure difference is 0.15Mpa.
3. The accuracy of 200Pa should be the most important standard for the stainless steel folding filter element, which determines whether it can achieve its purpose. When the structure of the filter element is sufficiently complete, the accuracy depends on the accuracy of the filter material.
4. Pollution capacity refers to the amount of pollutants that can be contained. The filter element can intercept contaminants, but cannot be directly removed from the system. Contaminants can only stay in the filter. The pollutant capacity of the filter element is equal to the product of the pollutant capacity per unit area and the filter area. It is related to the pressure difference of the actual operation of the filter element.
5. The frame of the stainless steel folding filter element ensures the strength. When the filter element with sufficient strength is used, it will not be deformed or broken, and there is no phenomenon of filter material falling off. Fluid pressure strength refers to the maximum pressure drop that can be withstood during working hours. , Usually not greater than the internal leak test pressure. Axial load strength means that normal assembly and disassembly forces can be accepted without deforming the filter element. Fatigue strength refers to the fatigue resistance of the filter element when subjected to shock, vibration and flow pulses.


Characteristics and application of stainless steel pleated filter element


basic introduction
The stainless steel filter element has good filtration performance and can exert uniform surface filtration performance for the filtration particle size of 2-200um. The main filter material adopts stainless steel wire mesh or multi-layer stainless steel sintered mesh. The filtration accuracy is 0.5-200um. Processing according to user requirements. (The stainless steel filter element here is different from the standard five-layer stainless steel sintered mesh filter element)

Stainless steel folding filter elements are widely used in environmental protection, petroleum, chemical, medical, high-temperature gas filtration, scientific research, metallurgy, food, machinery and other industries. His main filter material uses 304, 304L, 316, 316L stainless steel fiber sintered felt and stainless steel woven mesh as the main filter medium. The sealing surfaces of the filter element are joined by an argon arc welding process, and the filter layer adopts a multi-fold folding process to form a complete filter element. , No leakage, no media shedding phenomenon, stainless steel fiber sintered felt is a porous deep-shaped filter material made of stainless steel fiber after high temperature sintering; stainless steel woven mesh is woven by stainless steel wire.

Features:
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. The stainless steel precision filter element has high temperature resistance, corrosion resistance, pressure resistance and wear resistance, and is suitable for filtering high viscous liquids;
4. Good regeneration performance, long service life after chemical cleaning, high temperature and ultrasonic cleaning and repeated washing
5. All stainless steel structure, wide chemical compatibility;

The main technical parameters
1. Maximum working temperature of stainless steel precision filter element: ≤500℃
2. Filtering 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: 222, 226, 215, M36, M28, M24, M22, M20 threaded interface, etc.

How to choose stainless steel filter element?


　　 There are various stainless steel filter elements, so how to choose the correct filter element? Next, I will give you a specific introduction.
　　1. Determine the material of the stainless steel filter element according to the application environment. Stainless steel 304 is suitable for acid-resistant environments, and 316 is suitable for alkaline-resistant environments. It is very important to clarify the material we choose according to the applicable environment.
　　2. Inspection of the outside of the filter element and its welding position. The weld seam of a good product is flat and smooth and does not miss welding, so this is also very important when selecting.
Stainless steel filter element
　　3. There are also various interfaces for stainless steel filter elements, and the appropriate interface should be selected according to the supporting system.
　　 4. Selection of thickness of stainless steel sheet. Select the required stainless steel sheet frame according to different pressures. If the pressure is small, choose a thinner sheet, and if the pressure is high, you need to choose a thicker sheet.
　　 5. Find a professional stainless steel filter element manufacturer. This is also very important. A professional manufacturer is not only relatively mature in workmanship and craftsmanship, but also high in professional ability, so that it can provide customers with professional answers to product questions and technical support.


Introduction to the use of common filters


Filters are equipment used to remove solid impurities in fluids. There are filters on many machines in chemical plants. Before the lubricating oil enters the machine, before the fuel oil enters the nozzle, before the raw oil or sealing oil enters the pump, and before the steam condensate enters the trap, it is necessary to install filters.

1. Mesh filter

The mesh filter uses the filter to directly intercept the impurities in water, oil and other liquids, remove suspended solids and particles in water and oil, reduce turbidity, and purify water and oil.
The filtering accuracy of this filter is related to the mesh size and the number of layers of the screen. Generally, the flow rate is relatively large, the pressure loss is small, and it is easy to clean. The materials can be selected, such as stainless steel woven mesh, sintered mesh, and sintered felt.

2. Basket filter

The basket filter is used on oil or other liquid pipelines to filter the debris in the pipeline. The area of ??the filter hole is greater than 2-3 times the area of ??the diameter pipe. The structure of the filter is different from other filters, because it is shaped like a basket, it is named basket filter.
When the fluid enters the filter bucket 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 bucket and reload it after treatment. Yes, therefore, it is extremely convenient to use and maintain.
The filter element of this basket filter can be sintered with orifice plate and wire mesh to meet pressure and filtration requirements.