---
title: "HEPA/ULPA Filter Unit"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:HEPAULPA_FILTER_UNIT"
  data_integrity_hash: "14855c55e139e3d99356183a2cc12446"
  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:HEPAULPA_FILTER_UNIT"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hepaulpa-filter-unit.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/hepaulpa-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: "N/A"
    unit: "N/A"
    consequence: "Filter media fiber displacement under differential pressure exceeding 1250 Pa, causing bypass channels exceeding 5 μm width"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Moisture absorption exceeding 3% by mass in glass fiber media"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Hydrophobic coating with contact angle &gt;110° on filter fibers"
  - node_2:
      trigger: "Vibration amplitude exceeding 50 μm at 60 Hz from fan imbalance"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral vibration isolators with 85% transmissibility reduction at 60-120 Hz"
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"
  gasketseal:
    type: "component"
    urn: "URN:CNFX:ME:GASKETSEAL"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/hepaulpa-filter-unit.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "d36e03941227a28cb5ddee83072a2cb68d97dc0cb438ecbd113c97c675bfd0f3"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: HEPA/ULPA Filter Unit

## 1. Technical Definition
A filtration component that removes airborne particles from air streams within dust containment systems.

## 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 0.003% for HEPA (≥0.3 μm particles) or 0.001% for ULPA (≥0.12 μm particles) at rated flow**, Mechanism: **Filter media fiber displacement under differential pressure exceeding 1250 Pa, causing bypass channels exceeding 5 μm width**.

### 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 |
| :--- | :--- | :--- | :--- |
| Moisture absorption exceeding 3% by mass in glass fiber media | 8 | Media swelling increases pressure drop to 1500 Pa at rated flow | Hydrophobic coating with contact angle &gt;110° on filter fibers |
| Vibration amplitude exceeding 50 μm at 60 Hz from fan imbalance | 8 | Gasket seal compression loss creates 0.5 mm bypass gap | Integral vibration isolators with 85% transmissibility reduction at 60-120 Hz |

## 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**, **Dust Collection System**, **Pressure Differential Monitor**  
**Downstream Applications**: Cleanroom Air Systems, Pharmaceutical Manufacturing Equipment, Semiconductor Fabrication Tools  

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

### Q: What is the difference between HEPA and ULPA filter units?
**A**: HEPA filters capture 99.97% of particles at 0.3 microns, while ULPA filters capture 99.999% at 0.12 microns, offering higher efficiency for ultra-clean environments in machinery manufacturing.

### Q: How often should HEPA/ULPA filter units be replaced in dust containment systems?
**A**: Replacement frequency depends on usage and air quality, typically every 1-3 years. Monitor pressure drop across the filter; a significant increase indicates reduced efficiency and need for replacement.

### Q: What materials are used in these filter units and why?
**A**: Glass fiber media provides high particle capture efficiency, aluminum or galvanized steel frames offer durability, polyurethane/silicone sealants ensure airtight sealing, and polypropylene/aluminum separators maintain media pleat spacing for optimal airflow.

## 6. Manufacturing Compliance

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

### 🌐 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**: HEPAULPA_FILTER_UNIT | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: f98432f1
