---
title: "Fan Assembly"
industry: "Repair and Installation of Machinery and Equipment"
verification_protocol:
  urn: "URN:CNFX:ME:FAN_ASSEMBLY"
  data_integrity_hash: "39cd635c2e4f035e3596fb2205aa79ba"
  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:FAN_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/fan-assembly.md"
  official_resource_url: "https://cnfx.com/industry/repair-installation-machinery-equipment/product/fan-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-2.5 kPa static pressure, 0.5-15 m³/s volumetric flow rate, 500-1800 RPM rotational speed"
    unit: "m³/h"
engineering_limits:
  max_safe_operating_point:
    value: 120
    unit: "°C"
    consequence: "Bearing seizure due to lubricant thermal breakdown at 120°C, blade resonance at critical speed (1.5× operating RPM), aerodynamic stall at flow coefficient &lt;0.3"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Voltage unbalance exceeding 2% between phases"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Phase monitoring relay with 1% sensitivity cutoff"
  - node_2:
      trigger: "Particle ingress &gt;10 μm at concentration &gt;1000 particles/m³"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "ISO 16890 ePM1 50% efficiency filtration with 200 Pa maximum pressure drop"
bom_nodes:
  electric-motor:
    type: "part"
    urn: "URN:CNFX:ME:ELECTRIC_MOTOR"
    interface_type: "physical-logic-coupled"
  fan-impeller-blades:
    type: "component"
    urn: "URN:CNFX:ME:FAN_IMPELLER_BLADES"
    interface_type: "physical-logic-coupled"
  fan-housingcasing:
    type: "component"
    urn: "URN:CNFX:ME:FAN_HOUSINGCASING"
    interface_type: "physical-logic-coupled"
  motor-mounting-bracket:
    type: "component"
    urn: "URN:CNFX:ME:MOTOR_MOUNTING_BRACKET"
    interface_type: "physical-logic-coupled"
  shaft-and-bearings:
    type: "part"
    urn: "URN:CNFX:ME:SHAFT_AND_BEARINGS"
    interface_type: "physical-logic-coupled"
  pulley-and-belt-if-applicable:
    type: "part"
    urn: "URN:CNFX:ME:PULLEY_AND_BELT_IF_APPLICABLE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5801:2017 - INDUSTRIAL FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN ISO 13350:2015 - INDUSTRIAL FANS - PERFORMANCE TESTING OF JET FANS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/fan-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "2d62dddda6f055821354e643b5f2cc72e38c410227baef60258038734060dc6c"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Fan Assembly

## 1. Technical Definition
A mechanical assembly within an Air Handling Unit (AHU) responsible for moving air through the system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-2.5 kPa static pressure, 0.5-15 m³/s volumetric flow rate, 500-1800 RPM rotational speed**. Failure boundary: **Bearing temperature exceeding 120°C, blade tip deflection exceeding 0.5% of blade length, vibration amplitude exceeding 7.1 mm/s RMS**, Mechanism: **Bearing seizure due to lubricant thermal breakdown at 120°C, blade resonance at critical speed (1.5× operating RPM), aerodynamic stall at flow coefficient &lt;0.3**.

### 2.1 Analytical Physics Model
Governed by the **L10 Bearing Life & Fatigue Model**:

> **Primary Equation**: $L_{10} = (\frac{C}{P})^p$  
> **Engineering Impact**: Predicts mechanical lifecycle before component fatigue.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| C | Dynamic Load Rating | Engineering Constant |
| P | Equivalent Dynamic Load | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Voltage unbalance exceeding 2% between phases | 8 | Motor winding insulation breakdown at 130°C hotspot temperature | Phase monitoring relay with 1% sensitivity cutoff |
| Particle ingress &gt;10 μm at concentration &gt;1000 particles/m³ | 8 | Bearing raceway spalling after 10⁷ stress cycles at 3.5 GPa contact pressure | ISO 16890 ePM1 50% efficiency filtration with 200 Pa maximum pressure drop |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | m³/h | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Electric Motor](https://cnfx.com/llms/industry/electrical-equipment-manufacturing/product/electric-motor.md) `(Standalone System)`
- [Shaft and Bearings](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/shaft-and-bearings.md) `(Standalone System)`
- [Pulley and Belt (if applicable)](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/pulley-and-belt-if-applicable.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Variable Frequency Drive (VFD)**, **Air Filter Assembly**, **Ductwork System**  
**Downstream Applications**: Conditioned Air Supply, Ventilation System, Process Airflow  

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

### Q: What materials are best for fan assemblies in corrosive environments?
**A**: For corrosive environments, stainless steel fan assemblies are recommended due to their superior resistance to rust and chemical degradation compared to galvanized steel or aluminum.

### Q: What are the key components of a fan assembly in an AHU?
**A**: Key components include the electric motor, fan housing/casing, fan impeller (blades), motor mounting bracket, shaft and bearings, and optionally pulley and belt systems for certain configurations.

### Q: How often should fan assemblies be inspected in industrial machinery?
**A**: Fan assemblies should be inspected at least quarterly for wear, vibration, and alignment issues, with more frequent checks in high-use or harsh environments to prevent system failures.

## 6. Manufacturing Compliance
- ISO 5801:2017 - INDUSTRIAL FANS - PERFORMANCE TESTING USING STANDARDIZED AIRWAYS
- DIN EN ISO 13350:2015 - INDUSTRIAL FANS - PERFORMANCE TESTING OF JET FANS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Fan Assembly](https://cnfx.com/industry/repair-installation-machinery-equipment/product/fan-assembly)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **6** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: FAN_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 58e857ac
