---
title: "HEPA Filter Unit"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:HEPA_FILTER_UNIT"
  data_integrity_hash: "7ebacb2e5c803093f85d89e570c998a5"
  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:HEPA_FILTER_UNIT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hepa-filter-unit.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hepa-filter-unit"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 m/s face velocity, 100-1000 Pa pressure drop"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 1250
    unit: "Pa"
    consequence: "Filter media fiber degradation due to hygroscopic particle loading causing capillary condensation and fiber swelling, followed by mechanical rupture under differential pressure"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hygroscopic salt aerosol deposition (NaCl, (NH4)2SO4) at relative humidity &gt;75% RH"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hydrophobic fluoropolymer coating (ePTFE membrane) with contact angle &gt;110° and pre-filter with 85% ASHRAE efficiency"
  - node_2:
      trigger: "Electrostatic charge dissipation below 500 V surface potential due to conductive particle accumulation"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Permanent electret media with corona charging at 30 kV DC and aluminum separator plates with 5 mm spacing"
bom_nodes:
  filter-media:
    type: "component"
    urn: "URN:CNFX:ME:FILTER_MEDIA"
    interface_type: "physical-logic-coupled"
  frame:
    type: "component"
    urn: "URN:CNFX:ME:FRAME"
    interface_type: "physical-logic-coupled"
  separator:
    type: "component"
    urn: "URN:CNFX:ME:SEPARATOR"
    interface_type: "physical-logic-coupled"
  sealant:
    type: "component"
    urn: "URN:CNFX:ME:SEALANT"
    interface_type: "physical-logic-coupled"
  gasket:
    type: "component"
    urn: "URN:CNFX:ME:GASKET"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hepa-filter-unit.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "fc4d2db28bf25015ec7feed7d6a4b702dcf646fd076c8a256f1a88c3966d7dd8"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: HEPA Filter Unit

## 1. Technical Definition
A filtration component that removes airborne particles to maintain sterile air quality within controlled environments.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 m/s face velocity, 100-1000 Pa pressure drop**. Failure boundary: **Particle penetration exceeds 0.03% at 0.3 μm MPPS (Most Penetrating Particle Size) or pressure drop exceeds 1250 Pa**, Mechanism: **Filter media fiber degradation due to hygroscopic particle loading causing capillary condensation and fiber swelling, followed by mechanical rupture under differential pressure**.

### 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 |
| :--- | :--- | :--- | :--- |
| Hygroscopic salt aerosol deposition (NaCl, (NH4)2SO4) at relative humidity &gt;75% RH | 8 | Filter media delamination and fiber rupture due to cyclic hygroscopic swelling | Hydrophobic fluoropolymer coating (ePTFE membrane) with contact angle &gt;110° and pre-filter with 85% ASHRAE efficiency |
| Electrostatic charge dissipation below 500 V surface potential due to conductive particle accumulation | 8 | Penetration efficiency degradation at 0.1-0.3 μm particle size range exceeding ISO 29463-3 Class H14 limits | Permanent electret media with corona charging at 30 kV DC and aluminum separator plates with 5 mm spacing |

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

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Air Handling Unit**, **Differential Pressure Monitor**, **Cleanroom HVAC System**  
**Downstream Applications**: Pharmaceutical Cleanrooms, Semiconductor Manufacturing Facilities, Hospital Operating Rooms  

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

### Q: What materials are used in this HEPA filter unit?
**A**: This HEPA filter unit uses glass fiber filter media, an aluminum or galvanized steel frame, polyurethane or silicone sealant, and polypropylene or aluminum separators for durability and efficiency.

### Q: How does this HEPA filter maintain sterile air quality?
**A**: The HEPA filter removes airborne particles through its high-efficiency glass fiber media, ensuring clean, sterile air in controlled environments like manufacturing facilities.

### Q: What are the main components in the BOM for this filter?
**A**: The bill of materials includes filter media, frame, separator, sealant, and gasket, all designed for reliable performance in industrial machinery applications.

## 6. Manufacturing Compliance

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: HEPA Filter Unit](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hepa-filter-unit)**

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

> **Reference ID**: HEPA_FILTER_UNIT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 4b12b083
