---
title: "Valve Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:VALVE_ASSEMBLY"
  data_integrity_hash: "a9d8793462f6b1f1486dd31e338c2694"
  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:VALVE_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/valve-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/valve-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-3.0 bar"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 4.2
    unit: "bar"
    consequence: "Cavitation-induced erosion at the valve seat due to localized pressure drop below the vapor pressure of the thermal paste (0.02 bar at 25°C), causing bubble formation and implosion with impact forces exceeding 690 MPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Piezoelectric actuator depolarization due to sustained operation above 85°C Curie temperature"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrated PTC thermistor feedback loop with active cooling maintaining actuator temperature below 75°C"
  - node_2:
      trigger: "Silicon carbide nozzle abrasion from aluminum oxide particles (Mohs hardness 9) in thermal paste exceeding 150 ppm concentration"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "In-line 5 μm absolute filtration with differential pressure monitoring triggering bypass at 0.8 bar ΔP"
bom_nodes:
  valve-body:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_BODY"
    interface_type: "physical-logic-coupled"
  plungerneedle:
    type: "component"
    urn: "URN:CNFX:ME:PLUNGERNEEDLE"
    interface_type: "physical-logic-coupled"
  seal:
    type: "component"
    urn: "URN:CNFX:ME:SEAL"
    interface_type: "physical-logic-coupled"
  actuator:
    type: "part"
    urn: "URN:CNFX:ME:ACTUATOR"
    interface_type: "physical-logic-coupled"
  spring:
    type: "component"
    urn: "URN:CNFX:ME:SPRING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5208:2015 (INDUSTRIAL VALVES - PRESSURE TESTING OF VALVES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/valve-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "0d4107fd583f60b891dee3f8862aa538e04df53e5519ce1516a870d28edaca61"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Valve Assembly

## 1. Technical Definition
A precision fluid control mechanism that regulates the flow and dispensing of thermal paste in automated dispensing systems.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-3.0 bar**. Failure boundary: **4.2 bar differential pressure**, Mechanism: **Cavitation-induced erosion at the valve seat due to localized pressure drop below the vapor pressure of the thermal paste (0.02 bar at 25°C), causing bubble formation and implosion with impact forces exceeding 690 MPa**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Piezoelectric actuator depolarization due to sustained operation above 85°C Curie temperature | 8 | Valve seat displacement accuracy degradation beyond ±5 μm tolerance | Integrated PTC thermistor feedback loop with active cooling maintaining actuator temperature below 75°C |
| Silicon carbide nozzle abrasion from aluminum oxide particles (Mohs hardness 9) in thermal paste exceeding 150 ppm concentration | 8 | Orifice diameter increase from 0.5 mm to 0.58 mm causing flow rate deviation beyond ±2% specification | In-line 5 μm absolute filtration with differential pressure monitoring triggering bypass at 0.8 bar ΔP |

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

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Valve Body](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/valve-body.md) `(Standalone System)`
- [Actuator](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/actuator.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Automated Dispensing System**, **Thermal Paste Supply Unit**, **Precision Motion Controller**  
**Downstream Applications**: Electronic Circuit Boards, LED Lighting Assemblies, Computer CPU Heat Sinks  

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

### Q: What materials are used in this valve assembly and why?
**A**: This valve assembly uses stainless steel for structural durability, PTFE (Teflon) for chemical-resistant seals, and ceramic for wear-resistant plunger components. These materials ensure reliable performance with thermal paste and other viscous fluids in industrial environments.

### Q: How does this valve assembly regulate thermal paste flow?
**A**: The assembly uses a precision plunger/needle mechanism controlled by an actuator and spring system. This allows for accurate metering and dispensing of thermal paste with consistent flow rates, essential for automated manufacturing processes requiring precise thermal interface material application.

### Q: What maintenance is required for this valve assembly?
**A**: Regular inspection of seals and plunger components is recommended, with PTFE seals typically requiring replacement based on usage cycles. The stainless steel body requires minimal maintenance, while ceramic components offer extended service life due to their wear resistance in dispensing applications.

## 6. Manufacturing Compliance
- ISO 5208:2015 (INDUSTRIAL VALVES - PRESSURE TESTING OF VALVES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Valve Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/valve-assembly)**

### 🌐 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**: VALVE_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: a519d938
