Filter Bag Cage

Product Specifications

Technical details and manufacturing context for Filter Bag Cage

Definition

The filter bag cage is a critical internal component of a bag filter house that provides structural support to filter bags. It ensures the bags maintain their proper cylindrical shape during filtration cycles, prevents bag collapse under negative pressure, and facilitates efficient dust cake formation and cleaning. The cage allows for proper airflow distribution and protects the filter media from mechanical damage. Available in carbon steel, stainless steel, or galvanized steel, with surface treatments such as epoxy, PVC, or galvanization for corrosion resistance. Key parameters include diameter (100–200 mm), length (1000–6000 mm), number of support rings (3–15), wire diameter (3.0–6.0 mm), vertical wire spacing (100–200 mm), operating temperature (-40 to 260 °C), tensile strength (400–600 MPa for carbon steel wire, per GB/T 13793), straightness tolerance (±0.5 mm/m), roundness tolerance (±1.0 mm), weight (2–15 kg), and material grades (Q235, 304, 316, referencing GB/T 700 and ASTM A240). These values are reference ranges and must be verified for the specific model and application. The cage is inserted inside each filter bag, providing rigid support that prevents bag collapse under suction. During cleaning cycles (pulse-jet or reverse air), the cage maintains bag shape to ensure effective dust dislodgement while preventing bag-to-bag contact that could cause wear. When selecting a cage, consider the filter bag dimensions, operating conditions, and required corrosion resistance. Verify compatibility with the bag filter house and cleaning system. Regular inspection for corrosion, deformation, or coating damage is recommended. Failure signs include bag collapse, excessive bag wear, or reduced filtration efficiency. Always confirm model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The cage is inserted inside each filter bag, providing rigid support that prevents the bag from collapsing when suction is applied during filtration. During cleaning cycles (pulse-jet or reverse air), the cage maintains bag shape to ensure effective dust dislodgement while preventing bag-to-bag contact that could cause wear.

Common Materials

Carbon Steel, Stainless Steel, Galvanized Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Diameter	100–200 mm	Matches filter bag diameter
Length	1000–6000 mm	Custom lengths available
Number of Support Rings	3–15 pcs	More rings for longer cages
Wire Diameter	3.0–6.0 mm	Thicker wire for higher strength
Vertical Wire Spacing	100–200 mm	Affects bag support
Surface Treatment	Epoxy, PVC, Galvanized	Corrosion resistance
Operating Temperature	-40–260 °C	Depends on coating material
Tensile Strength	400–600 MPa	For carbon steel wireGB/T 13793
Straightness Tolerance	±0.5 mm/m	Ensures proper bag fit
Roundness Tolerance	±1.0 mm	Prevents bag distortion
Weight	2–15 kg	Depends on size and material
Material Grade	Q235, 304, 316	Carbon steel or stainlessGB/T 700, ASTM A240

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Top Cap Part
Provides secure attachment point to the tube sheet and prevents bag slippage

Material: steel
Vertical Wires Part
Provide longitudinal strength and prevent bag collapse along the length

Material: steel
Support Rings Part
Horizontal rings that maintain circular shape and prevent bag deformation

Material: steel
Bottom Ring Part
Closes the bottom of the cage and provides stability to the bag tip

Material: steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Bag Filter House

View system integration details

Manufacturers of Filter Bag Cage

Manufacturer profiles associated with Filter Bag Cage.

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Frequently Asked Questions

What is the purpose of a filter bag cage?

The filter bag cage supports the filter bag inside a bag filter house, maintaining its shape and preventing collapse under negative pressure during filtration and cleaning cycles.

What materials are filter bag cages made of?

Common materials include carbon steel, stainless steel, and galvanized steel. Surface treatments like epoxy or PVC can be applied for corrosion resistance.

How do I select the right filter bag cage?

Consider the filter bag diameter and length, operating temperature, required corrosion resistance, and the cleaning system used. Verify all parameters with the manufacturer.

What are signs of a failing filter bag cage?

Signs include bag collapse, increased bag wear, reduced filtration efficiency, or visible corrosion or deformation of the cage. Regular inspection is recommended.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 1.5 bar differential pressure
flow rate:	Dependent on bag count and size, typically 0.5-5 m³/min per bag
temperature:	-20°C to 400°C (depending on material)
slurry concentration:	Up to 500 g/m³ solids loading

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards