Industry-Verified Manufacturing Data (2026)

Filter Bag Cage

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Filter Bag Cage used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Filter Bag Cage is characterized by the integration of Top Cap and Vertical Wires. In industrial production environments, manufacturers listed on CNFX commonly emphasize Carbon Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A structural support frame that holds filter bags in place within a bag filter house, maintaining their shape and preventing collapse during operation.

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.
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
  • Diameter and length dimensions that must match the corresponding filter bag specifications (mm) Standard Spec
Components / BOM
  • Top Cap
    Provides secure attachment point to the tube sheet and prevents bag slippage
    Material: steel
  • Vertical Wires
    Provide longitudinal strength and prevent bag collapse along the length
    Material: steel
  • Support Rings
    Horizontal rings that maintain circular shape and prevent bag deformation
    Material: steel
  • Bottom Ring
    Closes the bottom of the cage and provides stability to the bag tip
    Material: steel
Engineering Reasoning
0-1500 Pa differential pressure
Structural yield at 2500 Pa differential pressure or 450°C continuous temperature
Design Rationale: Plastic deformation due to Von Mises stress exceeding 250 MPa yield strength of 304 stainless steel at elevated temperatures, causing permanent distortion
Risk Mitigation (FMEA)
Trigger Pulse-jet cleaning pressure exceeding 600 kPa
Mode: Weld fracture at cage-to-top plate connection
Strategy: Reinforced fillet welds with 8 mm throat thickness and stress-relief annealing at 850°C for 2 hours
Trigger Condensation-induced chloride stress corrosion cracking
Mode: Intergranular cracking in heat-affected zones below 150°C
Strategy: 316L stainless steel material with <0.03% carbon content and post-weld pickling in 20% HNO3 + 5% HF solution

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Filter Bag Cage.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
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
Media Compatibility
✓ Polyester filter bags (for general dust collection) ✓ PTFE filter bags (for high-temperature applications) ✓ Polypropylene filter bags (for chemical resistance)
Unsuitable: Chlorine gas environments (causes stress corrosion cracking in stainless steel cages)
Sizing Data Required
  • Filter bag dimensions (length and diameter)
  • Required number of filter bags in housing
  • Operating pressure differential across filter media

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Cage wire fatigue and breakage
Cause: Cyclic stress from bag pulsing and vibration, often exacerbated by material buildup causing uneven loading or corrosion weakening the metal.
Cage distortion or collapse
Cause: Over-tensioning during bag installation, thermal expansion mismatch, or impact damage during handling or maintenance.
Maintenance Indicators
  • Audible rattling or banging from the filter housing during operation, indicating loose or broken cage components.
  • Visible dust emission or increased pressure drop across the filter, suggesting bag failure due to inadequate cage support.
Engineering Tips
  • Implement regular cage inspection and cleaning to prevent material buildup that accelerates corrosion and stress concentrations.
  • Use proper installation tools and follow manufacturer torque specifications to avoid over-tensioning and ensure even bag support.

Compliance & Manufacturing Standards

Reference Standards
ISO 16890:2016 (Air filter testing) ASTM F316-03 (Pore size characteristics) CE Marking (EU Pressure Equipment Directive 2014/68/EU)
Manufacturing Precision
  • Wire diameter: +/-0.05mm
  • Cage roundness: 0.5mm max deviation
Quality Inspection
  • Visual inspection for weld integrity and surface defects
  • Dimensional verification against CAD drawings

Factories Producing Filter Bag Cage

Verified manufacturers with capability to produce this product in China

✓ 96% Supplier Capability Match Found

P Project Engineer from Australia Jan 05, 2026
★★★★★
"The technical documentation for this Filter Bag Cage is very thorough, especially regarding technical reliability."
Technical Specifications Verified
S Sourcing Manager from Singapore Jan 02, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Filter Bag Cage so far."
Technical Specifications Verified
P Procurement Specialist from Germany Dec 30, 2025
★★★★★
"Testing the Filter Bag Cage now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

18 sourcing managers are analyzing this specification now. Last inquiry for Filter Bag Cage from Brazil (1h ago).

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Frequently Asked Questions

What materials are filter bag cages typically made from?

Filter bag cages are commonly manufactured from carbon steel, stainless steel, or galvanized steel, with material selection based on the specific application requirements, temperature conditions, and chemical exposure in the filtration process.

How does a filter bag cage improve filtration efficiency?

The cage maintains the filter bag's shape during operation, preventing collapse that would reduce surface area and airflow. This ensures consistent dust collection, prevents bag damage, and maintains optimal pressure drop across the filtration system.

What are the main components of a filter bag cage?

A standard filter bag cage consists of a bottom ring, multiple support rings spaced along the height, a top cap for secure mounting, and vertical wires connecting all components to create a rigid cylindrical structure that supports the filter media.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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