---
title: "Demister"
industry: "Chemical Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DEMISTER"
  data_integrity_hash: "b92ebb6e926e4a60cc9b42a5d253371e"
  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:DEMISTER"
  data_source_uri: "https://cnfx.com/llms/industry/chemical-manufacturing/product/demister.md"
  official_resource_url: "https://cnfx.com/industry/chemical-manufacturing/product/demister"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-10 bar differential pressure, 0-150°C temperature, 0.5-15 m/s gas velocity"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 20
    unit: "m"
    consequence: "Droplet re-entrainment due to excessive gas momentum overcoming surface tension (Weber number &gt;12), mesh structural failure from differential pressure exceeding yield strength (σ_y=250 MPa for 316SS), chemical attack on wire mesh from acidic/alkaline condensate"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Chloride stress corrosion cracking in 316SS mesh at &gt;60°C with &gt;50 ppm chlorides"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Replace with duplex stainless steel (UNS S32205) or apply PTFE coating"
  - node_2:
      trigger: "Liquid overload exceeding 0.15 m³/m²·h drainage capacity"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install pre-separator cyclone or increase demister pad thickness to 150 mm"
bom_nodes:
  mesh-pad-packing:
    type: "component"
    urn: "URN:CNFX:ME:MESH_PAD_PACKING"
    interface_type: "physical-logic-coupled"
  support-grid-frame:
    type: "component"
    urn: "URN:CNFX:ME:SUPPORT_GRID_FRAME"
    interface_type: "physical-logic-coupled"
  liquid-drainage-system:
    type: "part"
    urn: "URN:CNFX:ME:LIQUID_DRAINAGE_SYSTEM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)"
    scope: "Verified Engineering Specification"
  - standard: "PED 2014/68/EU (PRESSURE EQUIPMENT DIRECTIVE)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/chemical-manufacturing/product/demister.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "947a156751a39983749c35c1f2940fda9bd090dd6069d5d25eddcd39a8d4a212"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Demister

## 1. Technical Definition
A device used to remove entrained liquid droplets from a gas or vapor stream.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-10 bar differential pressure, 0-150°C temperature, 0.5-15 m/s gas velocity**. Failure boundary: **Droplet re-entrainment at 20 m/s gas velocity, mesh collapse at 2.5 bar differential pressure, corrosion failure at pH&lt;4 or pH&gt;10**, Mechanism: **Droplet re-entrainment due to excessive gas momentum overcoming surface tension (Weber number &gt;12), mesh structural failure from differential pressure exceeding yield strength (σ_y=250 MPa for 316SS), chemical attack on wire mesh from acidic/alkaline condensate**.

### 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 |
| :--- | :--- | :--- | :--- |
| Chloride stress corrosion cracking in 316SS mesh at &gt;60°C with &gt;50 ppm chlorides | 8 | Mesh wire fracture and disintegration | Replace with duplex stainless steel (UNS S32205) or apply PTFE coating |
| Liquid overload exceeding 0.15 m³/m²·h drainage capacity | 8 | Flooding and carryover of liquid droplets | Install pre-separator cyclone or increase demister pad thickness to 150 mm |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Liquid Drainage System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/liquid-drainage-system.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Gas Compressor**, **Process Separator**, **Heat Exchanger**  
**Downstream Applications**: Polyethylene Pellets, Ammonia Gas, Refined Petroleum Products  

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

### Q: What materials are best for corrosive chemical applications?
**A**: For highly corrosive environments, PTFE (Teflon) or nickel alloys like Hastelloy offer superior resistance. 316L stainless steel is suitable for many common chemicals, while polypropylene (PP) provides cost-effective corrosion resistance for less aggressive streams.

### Q: How does the mesh pad design affect separation efficiency?
**A**: The mesh pad's density, material, and construction determine droplet removal efficiency. Denser pads with finer filaments capture smaller droplets but increase pressure drop. Proper selection balances efficiency with system energy requirements.

### Q: What maintenance does a demister require?
**A**: Minimal maintenance is needed with proper design. Periodic inspection of the mesh pad for fouling or damage, and ensuring the liquid drainage system remains unobstructed, maintains optimal performance. Materials like PTFE resist fouling in sticky applications.

## 6. Manufacturing Compliance
- ISO 9001:2015 (QUALITY MANAGEMENT SYSTEMS)
- PED 2014/68/EU (PRESSURE EQUIPMENT DIRECTIVE)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Demister](https://cnfx.com/industry/chemical-manufacturing/product/demister)**

### 🌐 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**: DEMISTER | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 3d0c6c9c
