UNITE bag filter housings are designed for industrial liquid filtration applications that require reliable suspended-solid removal, simple operation and convenient filter bag replacement. The housing holds a replaceable filter bag inside a sealed vessel. Contaminated liquid enters the housing, passes through the filter bag, and exits after suspended particles and impurities are retained.
The right configuration depends on flow rate, liquid properties, particle loading, filtration precision, operating pressure and the required maintenance interval. UNITE supplies single-bag and multi-bag designs and can recommend a suitable configuration according to your process conditions.
Need help selecting a housing?
Send us your liquid type, flow rate, filtration precision, temperature, pressure and piping requirements. Our engineers will recommend a suitable bag filter configuration.
UNITE offers single-bag, multi-bag and parallel multi-bag configurations for different liquid flow rates, particle loads, installation layouts and maintenance requirements. Use the comparison below as a preliminary guide, then contact our engineers for final sizing.
|
Configuration |
Recommended application |
Flow and capacity |
Main advantages |
Maintenance profile |
Select this option when |
|---|---|---|---|---|---|
|
Single-Bag Filter Housing |
Low- to medium-flow liquid filtration and compact process lines |
One filter bag; final capacity depends on liquid properties, filter bag specification and allowable pressure drop |
Compact footprint, simple structure, economical installation and fast bag replacement |
Simple access and straightforward bag replacement; requires planned shutdown or isolation before opening |
Compact layout and simple maintenance are more important than maximum capacity |
|
Multi-Bag Filter Housing |
Higher-flow industrial liquid filtration and applications with greater particle loading |
Multiple filter bags inside one housing; provides a larger filtration area and greater dirt-holding capacity than a single-bag design |
Higher filtration capacity, longer operating cycles and better suitability for larger process flows |
More bags to inspect or replace, but longer operating cycles may reduce replacement frequency |
The process requires higher capacity, larger filtration area or longer runs between maintenance |
|
Parallel Multi-Bag Configuration |
High-flow or continuous-production processes requiring flexible capacity and maintenance planning |
Modular arrangement; final capacity depends on the number of bags, flow distribution and process conditions |
Flexible expansion, configuration options for process layout and potential maintenance flexibility |
Configuration, isolation and replacement method should be confirmed during engineering design |
Continuous operation, future expansion or process-line flexibility is a priority |
As a general selection principle, choose a single-bag housing when compact size and simple maintenance are the priority. Consider a multi-bag housing when the process requires greater filtration capacity or longer operating cycles. Consider a parallel multi-bag configuration when flow flexibility, continuous production or future expansion is important.
Not sure which configuration fits your process?
Send us your liquid type, normal and peak flow rate, filtration precision, operating temperature, pressure and piping requirements. Our engineers will recommend a suitable bag filter housing configuration.
Quick-opening maintenance design
The quick-opening design helps operators access the filter bag efficiently during inspection and replacement, reducing maintenance time when the housing is correctly isolated and depressurized.
Secure sealing and leakage control
The sealing structure is designed to maintain contact between the housing and filter bag during operation. Confirm the correct seal and filter bag specification during installation.
Efficient liquid drainage
The side-inlet and bottom-outlet arrangement helps drain residual liquid from the housing and supports safer maintenance.
Stainless steel construction
Stainless steel wetted components provide corrosion resistance for suitable industrial liquid applications. Material selection should be confirmed against the liquid composition and operating temperature.
Configurations for different flow requirements
Single-bag, multi-bag and selected parallel configurations allow the filtration system to be matched to different flow rates, equipment layouts and maintenance requirements.
Bag filters are designed for simple operation and easy maintenance. The filter bag with the required filtration rating is installed inside the filter housing, the O-ring seal is checked for proper positioning, and the housing cover is securely tightened before operation.
After the pump starts, the pressure gauge will show a slight pressure increase, with the initial operating pressure typically around 0.05 MPa. During filtration, solid particles and impurities are captured inside the filter bag. As filtration continues, accumulated contaminants gradually increase the pressure differential across the filter.
When the pressure reaches approximately 0.4 MPa, the system should be stopped for inspection. The filter housing cover can then be opened, and the filter bag should be cleaned or replaced according to the contamination level. Cleaned filter bags can generally be reused to reduce operating costs.
The recommended operating pressure is typically between 0.1 and 0.3 MPa, which can be adjusted through the return line or pump return valve. Excessive filtration pressure should be avoided, as it may damage the filter bag and support mesh.
Operating pressure and pressure-drop values depend on the selected housing, filter bag, liquid and process conditions. The values shown in the technical documentation are reference values for equipment selection and operation. Confirm the final design conditions with UNITE engineers before purchase.
The table below lists selected UNITE bag filter housing models. Actual flow capacity depends on liquid viscosity, particle loading, filter bag precision, operating pressure and allowable pressure drop. Contact UNITE for final sizing and configuration.
| Model | Inlet/Outlet Size (DN) | Maximum Flow Rate (m³/h) | Filter Area (m²) | A(mm) | B(mm) | D(mm) | L(mm) |
|---|---|---|---|---|---|---|---|
| DS-B-S3 | 80 | 75 | 1.35 | 1203 | 262 | 450 | 350 |
| DS-B-S4 | 100 | 100 | 1.8 | 1206 | 280 | 500 | 400 |
| DS-B-S5 | 125 | 125 | 2.25 | 1268 | 313 | 550 | 400 |
| DS-B-S6 | 150 | 150 | 2.7 | 1288 | 313 | 600 | 450 |
| DS-B-S7 | 150 | 175 | 3.15 | 1370 | 350 | 700 | 500 |
| DS-B-S9 | 200 | 225 | 4.05 | 1440 | 740 | 750 | 550 |
| DS-B-S10 | 200 | 250 | 4.5 | 1480 | 460 | 800 | 580 |
| DS-B-S14 | 250 | 350 | 6.3 | 1555 | 830 | 900 | 650 |
| DS-B-S17 | 300 | 425 | 7.65 | 1845 | 950 | 1000 | 715 |
| DS-B-S21 | 350 | 525 | 9.45 | 1925 | 980 | 1100 | 800 |
| DS-B-S24 | 350 | 600 | 10.8 | 2015 | 1000 | 1200 | 850 |
Talk to Our Engineers to Get a Free, Customized Filtration Solution.
An industrial bag filter housing is a vessel that holds a replaceable filter bag and supports liquid filtration in a process line. It removes suspended solids and other retained particles from liquids before the liquid moves to the next process stage.
Contaminated liquid enters the housing and flows through the filter bag. The bag retains suspended solids while filtered liquid exits through the outlet. As particles accumulate, the pressure drop increases and the bag must be cleaned or replaced according to the operating procedure.
The housing is the reusable vessel that connects to the process piping. The filter bag is the replaceable filtration media installed inside the housing. Both the housing and the bag must be selected for the liquid, flow rate, filtration requirement and operating conditions.
A single-bag housing is generally considered for compact, low- to medium-flow systems with simple maintenance requirements. A multi-bag housing is generally considered for higher flow rates, greater dirt loading or longer operating cycles. UNITE engineers can recommend a configuration based on your process data.
Provide the normal and peak flow rate, liquid type, viscosity, temperature, required filtration precision, particle loading, allowable pressure drop, connection size and available installation space. These details allow the housing and filter bag to be evaluated together.
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Complete bag filtration solutions for FAW’s painting workshops ensure zero-defect surface quality across pre-treatment and electro coating (ED)processes, significantly reducing rework rates
For a large chemical plant in the Dalian Development Zone, UNITE supplied a modular automatic self-cleaning filtration unit for high-flow circulating cooling-water purification and reuse. The system combines stainless-steel wedge-wire screens, motor-driven suction or brush cleaning, automatic blowdown, differential-pressure and timer triggers, PLC control, touchscreen monitoring, remote communication, and corrosion-resistant construction. The reported result was an extension of heat-exchanger cleaning and maintenance cycles by more than 50%, together with zero manual intervention for automatic blowdown.
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