Liquid Filtration Simple Structure Bag Filter

The liquid filtration simple structure bag filter use the porous material of the filter bag. When the liquid containing impurities passes through, the solid particles in the liquid are trapped in the filter bag, thereby purifying the liquid.

 

Design structure

1. Filter container

The filter container is the main part of the liquid filtration simple structure bag filter. It is not only the housing for the filter bag, but also the basis for the stable operation of the entire filtration system. The container is usually made of corrosion-resistant materials such as stainless steel and carbon steel to meet the chemical compatibility requirements of different media. The container design needs to consider the volume, strength, cleaning convenience and installation method. Common shapes are cylindrical and square, and the top is permanently covered with a quick-opening lid to facilitate the replacement of the filter bag and internal cleaning.

2. Support basket

The supporting net basket is located inside the container, and its main function is to provide a stable support for the filter bag, ensure that the filter bag does not collapse under working conditions, and at the same time promote the uniform distribution of liquid to improve filtration efficiency. The net basket is usually woven with metal wire mesh, and the mesh size should be smaller than the aperture of the filter bag to prevent impurities from falling when replacing the filter bag. The edge of the net basket is designed with a fixing ring or hook, which cooperates with the sling or ring mouth of the filter bag to ensure that the filter bag is firmly installed.

3. Filter bag

The filter bag is the core component of the liquid filtration simple structure bag filter, and its material and pore size directly determine the filtration accuracy and application range. Commonly used filter bag materials include polypropylene (PP), polyester (PET), nylon (NYLON), polytetrafluoroethylene (PTFE), etc. Each material has its own specific temperature resistance, chemical stability and filtration performance. The structure of the filter bag is mostly cylindrical, with one end closed and the other end open with rings or ropes for easy fixing. According to the filtration requirements, the filtration grade of the filter bag can range from micron level to tens of microns.

 

Parameters

Flange standard	HG, GB, SH, HGJ, J8, ANSI, JIS
Connections	Thread, Flange, Clamp
Drain outlet specification	1/4
Filtering precision	0.5 - 800 μm
Design pressure	0.6 - 1.0 Mpa
Design temperature	90°C for PP filter bag, 130°C for PE filter bag, 240°C for PTFE filter bag
Surface treatment	Sand blasting, polishing
Housing material	20#, 304, 316L, 2205/2507, titanium
Sealing gasket material	Silica gel, NBR, PTFE
Filter bag material	Polyester, polypropylene, nylon, PTFE, glass fiber

 

Working principle

The liquid to be filtered enters from the inlet at the top or side of the container, the liquid passes through the filter bag under the action of gravity (or by pump pressure), solid particles or impurities are trapped by the filter bag, and the clean liquid passes through the filter material and flows out from the bottom or side outlet. As the filtration time expands, impurities gradually accumulate on the surface and inside the filter bag, resulting in an increase in the pressure difference and a decrease in the filtration rate. At this time, the filter bag needs to be replaced or cleaned.

 

Material selection

- Polypropylene (PP). Resistant to acid and alkali, low cost, suitable for filtration of most inorganic chemicals.

- Polyester (PET). Better temperature resistance than PP, high mechanical strength, suitable for food and beverage industries.

- Nylon (NYLON). Good wear resistance and elasticity, suitable for filtration of liquids containing oil stains.

- Polytetrafluoroethylene (PTFE). Extremely high chemical stability and temperature resistance, almost free from any chemical attack, suitable for strong acid and alkali and high temperature environments.

 

Application field

- Chemical industry. Raw material filtration, finished product purification, such as coatings, resins, solvents, etc.

- Food and Beverage. Clear filtration of syrups, alcohol, fruit juices, drinking water.

- Pharmaceutical industry. Removal of impurities from the original drug solution and extract to ensure the purity of the drug.

- Water treatment. Removal of suspended solids in groundwater, circulating cooling water, and wastewater pretreatment.

- Electronic electroplating. Purification of electroplating solution and etching solution to prevent impurities from affecting product quality.

 

Maintenance

1. Regular inspection. Monitor the pressure drop of the filter. When the pressure difference exceeds the design value, the filter bag should be replaced or cleaned in time.

2. Correct cleaning. Choose the appropriate cleaning method according to the material of the filter bag to avoid the use of chemical cleaning agents that may damage the filter bag.

3. Filter bag replacement. Change the filter bag regularly, the frequency depends on the degree of contamination of the filter medium and filtration requirements. Pay attention to sealing when replacing to avoid leakage.

4. Equipment maintenance. Regularly check the integrity of filter containers, support baskets and other components, and repair or replace damaged parts in a timely manner.

5. Records Management. Establish records of filter use, maintenance, and replacement to help evaluate filtration efficiency and optimize maintenance schedules.

 

FAQ

1. Q: What is the function of a filter?

A: The main function of a filter is to remove solid particles, impurities, and harmful substances from liquids or gases, in order to achieve purification, clarification, and protection of equipment.

2. Q: How to choose a suitable filter?

A: When choosing a filter, factors such as the properties of the material being filtered (e.g., viscosity, temperature, corrosion), required filtration accuracy, processing capacity, operating pressure and medium, as well as the type, material, size, and installation method of the filter should be considered.

3. Q: What is the working principle of a filter?

A: The working principle of a filter mainly relies on physical screening, deep interception, absorption, or chemical reactions to remove impurities or harmful components from the material being filtered.

4. Q: How to maintain and care for a filter?

A: Maintenance of filters includes regular cleaning or replacement of filter elements, inspection of seals and fasteners, maintaining stable operating pressure, and avoiding overloading. Specific methods should be referenced from the filter's instruction manual and maintenance guides.

5. Q: What is the service life of a filter?

A: The service life of a filter depends on its working environment, processing volume, and filtration accuracy. Generally, when the filter's pressure drop reaches a certain value or the filtration effect decreases significantly, it needs to be replaced or cleaned.

6. Q: What should be paid attention to during filter installation?

A: During filter installation, attention should be paid to the directionality, ensuring that the fluid enters and exits from the correct ports. Also, the piping system should be cleaned before installation, and the filter should be securely fastened and sealed as required by the instructions.

7. Q: What is the replacement cycle for filters?

A: The replacement cycle for filters depends on their working conditions and filtration requirements, and is usually indicated by pressure difference indicators or timers. When the filter's pressure drop reaches the set value or the filtration effect decreases, it should be replaced in a timely manner.

 

Why Choose Us

· Professional manufacturer with many years' experience

· Good quality with competitive price

· OEM & ODM are welcome

· Various payment items are acceptable

· Good service by experienced manager

 

AIDA Philosophy

1. Management Concept:

· Satisfy the customers' demand --- Touch customers, trust with our products and services

· Make employees happy --- Pursue higher material and spiritual happiness

2. Company Mission:

· Focus on customer needs, provide best filtering solution

· To be the lifelong partner with customers

3. Corporate Vision:

· Become a global purification leadership brand

4. Values:

· Customer: Pursue the ultimate experience, enjoy excellent quality

· Team: Trust, responsibility, growth, win-win

· Work: Simple, sincere, efficient, dedicated