You’ve been using precision filters for a long time – how much do you know about these aspects?

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I. Introduction to precision filters: Precision filters (also known as safety filters) typically have a housing made of stainless steel. Inside, tubular filter elements such as PP melt-blown filters, sintered wire filters, pleated filters, titanium filters, and activated carbon filters are used as filtering components. Different filter elements are selected based on the type of filtration medium and the design requirements, in order to meet the desired water quality standards. It is used for the solid-liquid separation of various suspensions, as well as for filtering pharmaceutical solutions that require high environmental standards and high filtration precision. It has a wide range of applications and is suitable for industries such as pharmaceuticals, food, chemicals, environmental protection, and water treatment. II. Equipment Performance (1) High filtration precision with uniformly sized filter element pores ； (2) Low filtration resistance, high flow rate, strong dirt trapping capacity, and long service life ； (3) The filter element material has a high level of cleanliness and does not contaminate the filtering medium ； (4) Resistance to chemical solvents such as acids and alkalis ； (5) High strength, heat-resistant; the filter element is not prone to deformation ； (6) Low price, low operating costs, easy to clean, and the filter elements can be replaced. III. Filter Types

Q-Class Precision Filter: https://bkimg.cdn.bcebos.com/pic/7dd98d1001e93901aec9554c7bec54e737d196fd?x-bce-process=image/resize,m_lfit,w_440,limit_1/format,f_auto
General application: Pre-filter for conventional reciprocating air compressors. Material: Multi-layer glass fiber filter elements. Particle size filtered out: 5 MICRON. Oil content filtered out: 5 PPM. Maximum pressure: 16 KG/CM. Maximum temperature: 65°C. Normal pressure drop: 0.2 KG/CM. Maximum pressure drop: 0.7 KG/CM.
Function: Removes a large amount of oil and gas from compressed air to levels below 5 PPM, as well as removing impurity particles down to 5 MICRON.

P-Class Precision Filter: General application: Pre-filter for conventional screw air compressors. Material: Multi-layer glass fiber filter elements. Particle size filtered out: 1 MICRON. Oil content filtered out: 0.5 PPM. Maximum pressure: 16 KG/CM. Maximum temperature: 65°C. Normal pressure drop: 0.17 KG/CM. Maximum pressure drop: 0.7 KG/CM.
Function: Removes oil and gas from compressed air to levels below 0.5 PPM, and removes impurity particles down to sizes smaller than 1 MICRON.

S-Class Precision Filter: General application: Post-filter for conventional air compressors. Material: Multi-layer glass fiber filter elements. Particle size filtered out: 0.01 MICRON. Oil content filtered out: 0.01 PPM. Maximum pressure: 16 KG/CM. Maximum temperature: 65°C. Normal pressure drop: 0.275 KG/CM. Maximum pressure drop: 0.7 KG/CM.
Function: Removes trace amounts of oil and gas from compressed air to levels of 0.01 PPM, as well as removing impurity particles down to 0.01 MICRON, thereby producing high-quality compressed air free of oil.

C-Class Precision Filter: Used for highly precise filtration purposes. https://bkimg.cdn.bcebos.com/pic/63d9f2d3572c11df332c0742622762d0f603c2d6?x-bce-process=image/resize,m_lfit,w_440,limit_1/format,f_auto
Material: Activated carbon filter elements. Particle size filtered out: 0.03 MICRON. Oil content filtered out: 0.003 PPM. Maximum pressure: 16 KG/CM. Maximum temperature: 65°C. Normal pressure drop: 0.75 KG/CM. Maximum pressure drop: 0.7 KG/CM.
Function: Used to remove ozone from compressed air, as well as very fine amounts of oil and gas and ultra-fine particles. To achieve high levels of precision in filtration, these filters utilize multiple layers of different filtering materials, including borosilicate fiber layers, glass fiber layers, activated carbon fiber layers, multiple layers of non-woven fabric, and stainless steel mesh layers. Only in this way can high-quality air free of oil and impurities be achieved. The main pipeline filter in C model can remove a large amount of liquid as well as solid particles larger than 3μm, achieving a minimum residual oil content of only 5ppm; it also removes small amounts of moisture, dust, and oil mist. Used for air compressors, after the rear cooler and before other filters, for general protection purposes ； Used as a pretreatment device before the cold dryer. The T air pipeline filter can remove liquid and solid particles as small as 1μm, achieving a minimum residual oil content of only 0.5ppm, along with trace amounts of moisture, dust, and oil mist. Used for pre-treatment before A-grade filters ； After the cold dryer and desiccant dryer, air quality is further improved. A super-high-efficiency oil removal filter can remove liquid and solid particles as small as 0.01μm, achieving a minimum residual oil level of only 0.001ppm; almost all moisture, dust, and oil are removed. It serves as a protective layer before H-grade filtration and desiccators, and after the cold dryer to ensure that the air is free of oil. The H activated carbon micro-oil mist filter can remove oil mist and hydrocarbons as small as 0.01μm, achieving a minimum residual oil level of only 0.003ppm; it contains no moisture, dust, or oil, and is odorless and tasteless. It serves as the final filtering stage, providing high-quality air for those industries that require it, such as the food industry, respiratory equipment, and aseptic packaging. 4. Function of precision filters: Precision filters are usually placed after pressure filters; they are used to remove tiny particles from liquids, so as to meet the requirements of subsequent processing steps regarding the quality of the water. Sometimes they are also installed at the end of the complete water treatment system to prevent small particles from entering the finished water. The common filter elements used have the following specifications: 0.1, 0.2, 0.5, 0.8, 1, 2, 3, 5, 10, 20, 30, 50, 75, 100, 120 um. Security filters are often used as protective filters in devices such as electrodialysis, ion exchange, reverse osmosis, and ultrafiltration. V. Installation and usage instructions: 1. Clean the filter housing. 2. The inlet and outlet of the clean housing are connected to the filtration pipeline; pay attention to the direction of connection to ensure that water enters from the outside and exits from the inside of the filter element. 3. Open the plastic bag at one end of the filter element opening, and check whether the O-ring is intact and in place. 4. Wet the O-ring and the filter holder sockets with an appropriate wetting agent (such as water). 5. Hold the filter element near the O-ring end, and insert the filter element socket vertically into the filter holder socket. 6. After inserting the filter element, remove the packaging bag of the filter element, then fasten it with the pressing plate, and subsequently install the metal cover. 7. Open the vent valve at the top of the housing. 8. Slightly open the inlet valve to allow liquid to enter the housing, until liquid flows out from the vent valve at the top of the housing; then close the vent valve. 9. Slowly open the downstream outlet valve until the pressure drop between the upstream and downstream sides of the filter reaches 0.02 Mpa (the initial pressure drop at the determined flow rate). 6. Precautions: 1. The filters should be arranged according to the principle of \"coarse first, then fine,\" and the order must not be reversed. 2. The flow rate, pressure, and temperature of the compressed air actually passing through the filter must not exceed the values specified on the nameplate. 3. During installation, care must be taken to distinguish the inlet and outlet positions of the filter. 4. The filter should be installed vertically as appropriate. Leave a certain height above the ground to facilitate the replacement of the filter element. 5. The filter element should be replaced when one of the following conditions occurs: a) The filter shows significant deterioration; b) The pressure difference exceeds 0.07 MPa; (Note: Initial pressure drop of the filter element