---
title: "Secondary Medium Filter"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SECONDARY_MEDIUM_FILTER"
  data_integrity_hash: "4c4d315989865df2d65040590f557c08"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:SECONDARY_MEDIUM_FILTER"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/secondary-medium-filter.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/secondary-medium-filter"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-6.0 bar differential pressure"
    unit: "μm"
engineering_limits:
  max_safe_operating_point:
    value: 8.2
    unit: "bar"
    consequence: "Filter media delamination due to excessive pressure differential exceeding the polypropylene fiber bond strength of 0.8 MPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Particulate loading exceeding 150 g/m² surface density"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install differential pressure transmitter with 4-20 mA output triggering automatic bypass at 7.5 bar ΔP"
  - node_2:
      trigger: "Chemical incompatibility with pH &lt;4.5 process fluid"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Specify PTFE-coated filter media with chemical resistance to pH 2-12 range"
bom_nodes:
  filter-element:
    type: "component"
    urn: "URN:CNFX:ME:FILTER_ELEMENT"
    interface_type: "physical-logic-coupled"
  housing:
    type: "component"
    urn: "URN:CNFX:ME:HOUSING"
    interface_type: "physical-logic-coupled"
  sealsgaskets:
    type: "component"
    urn: "URN:CNFX:ME:SEALSGASKETS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 16889:2022 (HYDRAULIC FLUID POWER - FILTERS - MULTI-PASS METHOD FOR EVALUATING FILTRATION PERFORMANCE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/secondary-medium-filter.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "774f60565403c39986e93d5b4554d5d0232b81c6aeb26bfa8e2861d4c95ba8c6"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Secondary Medium Filter

## 1. Technical Definition
A filtration component that performs intermediate particle removal within a multi-stage system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-6.0 bar differential pressure**. Failure boundary: **8.2 bar differential pressure sustained for &gt;30 seconds**, Mechanism: **Filter media delamination due to excessive pressure differential exceeding the polypropylene fiber bond strength of 0.8 MPa**.

### 2.1 Analytical Physics Model
Governed by the **Darcy-Weisbach Pressure Drop**:

> **Primary Equation**: $\Delta P = f \cdot \frac{L}{D} \cdot \frac{\rho v^2}{2}$  
> **Engineering Impact**: Critical for sizing CIP (Clean-In-Place) pump heads.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| f | Friction Factor | Engineering Constant |
| L | Pipe Length | Engineering Constant |
| v | Velocity | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Particulate loading exceeding 150 g/m² surface density | 8 | Flow restriction causing 85% pressure drop increase | Install differential pressure transmitter with 4-20 mA output triggering automatic bypass at 7.5 bar ΔP |
| Chemical incompatibility with pH &lt;4.5 process fluid | 8 | Polypropylene media hydrolysis reducing filtration efficiency to 40% at 10 μm | Specify PTFE-coated filter media with chemical resistance to pH 2-12 range |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | μm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Industrial Air Compressor**, **Pneumatic Control System**, **Filter Media Loading System**  
**Downstream Applications**: Hydraulic Fluid Systems, Industrial Lubrication Systems, Process Water Treatment Systems  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What particle size range does a secondary medium filter typically remove?
**A**: Secondary medium filters are designed to remove intermediate particles typically in the 5-25 micron range, positioned between coarse pre-filters and fine final filters in multi-stage systems.

### Q: How often should secondary medium filter elements be replaced in industrial equipment?
**A**: Replacement intervals depend on operating conditions and contaminant load, but typically range from 3-12 months. Monitor pressure differential across the filter and follow manufacturer recommendations for your specific application.

### Q: Can secondary medium filters be used with different fluid types in machinery applications?
**A**: Yes, material selection determines compatibility. Polypropylene filters work with most aqueous solutions, stainless steel handles aggressive chemicals and high temperatures, while polyester offers good chemical resistance for various industrial fluids.

## 6. Manufacturing Compliance
- ISO 16889:2022 (HYDRAULIC FLUID POWER - FILTERS - MULTI-PASS METHOD FOR EVALUATING FILTRATION PERFORMANCE)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Secondary Medium Filter](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/secondary-medium-filter)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SECONDARY_MEDIUM_FILTER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 38c43b62
