Stainless Steel Multi Bag Filter Manufacturer In China
Stainless steel multi-bag filters are efficient and durable filtration equipment in industrial fluid processing. They are suitable for bag filtration solutions and take into account both batch fluid clarification and high-flow medium purification scenarios.
Hanzhikang has been deeply engaged in the research and development of solid-liquid separation equipment for more than 30 years.
Hanzhikang equipment provides standard configurations and supports customization based on complex working conditions.
Products Advantages
Our bag filters combine precision design with excellent manufacturing technology, with high-efficiency filtration performance, no need for backwashing, significantly reducing downtime and optimizing production efficiency.
The product adopts ergonomic design, easy operation and maintenance, improving the overall user experience.
The reliable sealing system effectively prevents leakage and bypass, ensuring the filtration effect and clean and safe working environment.
The superior lid closing system of our bag filter ensures secure closure, maintaining the integrity of the filtration process. This advanced system minimizes the risk of accidental opening, providing added reliability and peace of mind to users.
Equipped with differential gauge ports, our bag filter allows for accurate monitoring of pressure differentials, enabling timely maintenance and filter replacement. This proactive approach helps to optimize filter performance and prolong equipment lifespan.
Our bag filter boasts a zero discharge solution, meaning there is no loss of process fluids during operation. This environmentally-friendly feature minimizes waste and ensures efficient utilization of resources, aligning with sustainable manufacturing practices.
Designed to withstand varying pressure conditions, our bag filter accommodates both high and low-pressure applications, offering versatility and adaptability to diverse industrial environments.
Our bag filter is equipped with a convenient drain port, facilitating easy removal of collected debris and waste, further streamlining maintenance procedures.
Our bag filter is available in both 304 and 316 stainless steel variants, ensuring compatibility with a wide range of applications. With ample stock ready to ship, we prioritize timely delivery to meet our customers' needs promptly.
Multi-bag filter selection table
| Serial number | Specification/model | Diameter mm | Total height mm | Interface type | Filter bag | Flow rate |
| 1 | HZK2-2 | 400 | 1600 | 3-inch internal thread, quick-install, flange | 2*2 | 80 |
| 2 | HZK2-3 | 500 | 1600 | 3-inch internal thread, quick-install, flange | 2*3 | 120 |
| 3 | HZK2-4 | 550 | 1600 | 4-inch internal thread, quick-install, flange | 2*4 | 160 |
| 4 | HZK2-5 | 600 | 1600 | 4-inch internal thread, quick-install, flange | 2*5 | 200 |
| 5 | HZK2-16 | 1100 | 11600 | 5-inch internal thread, quick-install, flange | 2*16 | 640 |
Bag filter housing structure and working principle
Bag filter housing structure
- Filter housing: stainless steel, corrosion-resistant and pressure-resistant, with flange or quick-opening cover for cylinder.
- Filter bag support basket: located inside the housing to support the filter bag and prevent impact deformation, made of SS punching mesh.
- Filter bag: core filter element, replaceable, with various materials, filtration accuracy starting from 1μm.
- Sealing device: installed at the filter bag opening, leak-proof, using O-ring and other sealing forms and various materials.
- Inlet and outlet interface: flange or threaded connection, with side inlet and bottom outlet, top inlet and bottom outlet and other structures.
- Cover opening structure: easy to replace filter bags, commonly used quick opening or bolt locking structure.
- Exhaust/drain port: used to discharge gas or residual liquid, improve filtration efficiency and cleaning convenience.
1. Liquid inlet: The liquid to be filtered enters the filter housing from the liquid inlet.
2. Flow diversion: The liquid is evenly distributed in the housing and guided to the direction of the filter bag.
3. Filtration: The liquid passes through the filter bag and impurities are trapped on the inner wall of the filter bag.
4. Liquid outlet: The clean liquid flows out from the liquid outlet after passing through the filter bag.
5. Dirt collection: Impurities continue to accumulate in the filter bag and do not affect the normal liquid discharge.
6. Replacement: When the filter bag is blocked, stop the machine, open the upper cover and replace the filter bag.
7. Reset: Cover the upper cover to seal, restart, and continue filtering.
Stainless steel bag filter precautions
1. Replace the filter bag regularly
- The replacement cycle depends on the actual use (such as increased pressure difference, decreased flow rate, etc.).
- Operation steps: Close the inlet and outlet valves → Release the pressure → Open the cover → Remove the old bag → Install the new bag → Cover and seal → Resume operation.
2. Clean and flush the equipment
- Rinse the inside of the shell with clean water or appropriate cleaning fluid regularly to prevent impurities from accumulating.
- For systems that handle viscous or easily scaled media, it is recommended to perform deep cleaning regularly.
3. Check the seals and fasteners
- Check whether the O-rings or gaskets are aging, deformed or damaged, and replace them in time if necessary.
- Check whether the bolts or clamps on the upper cover are loose to maintain the sealing of the cover.
4. Monitor the pressure difference
- It is recommended to install inlet and outlet pressure gauges to monitor the pressure difference in real time.
- When the pressure difference exceeds the set value (usually 0.1~0.2MPa), the filter bag should be replaced.
5. Anti-corrosion maintenance
- Although it is made of stainless steel, it should still avoid long-term contact with strong acids and alkalis.
- After use, clean it as much as possible, drain any residual liquid, and keep it dry.
FAQ
What is the maximum allowable working pressure and temperature of stainless steel bag filters?
The design pressure of standard bag filter housings is generally 10 bar (1.0 MPa), and specially designed high-pressure bag filters can reach 16 bar. The working temperature is usually between -10℃ and 120℃. When using 316L stainless steel and high-temperature resistant sealing rings, it can withstand higher temperatures. The temperature resistance range of filter bag materials varies depending on the material. Generally, PP materials are suitable for temperatures within 90℃, and PTFE can reach 260℃.
What are the material options for filter bags? How to choose?
Common filter bag materials include polypropylene (PP), polyester (PE), nylon (NMO), PTFE and stainless steel sintered filter bags. The selection is based on factors such as filtration accuracy, chemical properties of the medium, temperature, pH value, viscosity, etc. PP filter bags have good acid and alkali resistance and are suitable for general liquids; nylon is suitable for oils and solvents; PTFE is suitable for strong acids, alkalis and high temperature environments.
How to determine whether the filter bag needs to be replaced?
Generally, it is judged by monitoring the inlet and outlet pressure difference of the filter. When the pressure difference exceeds the preset value (such as 0.1-0.2 MPa) or the filtration flow rate drops significantly, it means that the filter bag is seriously blocked and needs to be replaced. If the effluent is turbid or impurities leak, the filter bag should also be replaced in time.
What is the filtration accuracy range of bag filters?
The filtration accuracy of commonly used filter bags ranges from 1 micron to 200 microns. Micron-level filtration is suitable for fine filtration with higher requirements, and coarse filtration can be used for pre-filtration and removal of large particle impurities. Users should choose the appropriate filtration accuracy according to process requirements and liquid characteristics.
Can stainless steel bag filters run continuously?
Yes, but it is usually recommended to equip two or more filters for alternating use so that when one filter is replaced or maintained, the other continues to run to ensure system continuity and production efficiency.
How to choose the appropriate filter inlet and outlet type?
Side inlet and side outlet:
- Features: simple pipeline layout, suitable for space-constrained scenarios.
- Disadvantages: dead corners may remain and need to be emptied regularly.
Top inlet and bottom outlet:
- Features: Liquid flows from top to bottom, impurities are deposited at the bottom, and sewage is discharged thoroughly.
- Applicable: Liquid with high solid content (such as slurry).
Side inlet and bottom outlet:
- Features: Balance flow uniformity and sewage discharge convenience, the most common design.
Top inlet and bottom outlet are preferred for high viscosity liquids, and bottom sewage valves are required for media that are easy to precipitate.
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