---
title: "Valves"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:VALVES"
  data_integrity_hash: "01e51cec5d15b337f12f2229d850a110"
  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:VALVES"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/valves.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/valves"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-350 bar differential pressure, -196°C to 650°C temperature"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 550
    unit: "MPa"
    consequence: "Cavitation-induced erosion at vapor pressure threshold of 0.023 bar absolute or thermal fatigue from ΔT&gt;200°C cyclic loading"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Particulate contamination exceeding 25 μm particle size"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install dual 10 μm absolute filters with differential pressure monitoring"
  - node_2:
      trigger: "Actuator torque exceeding 120% of rated Nm due to stiction"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement piezoelectric torque sensors with 0.1 Nm resolution and automatic lubrication"
bom_nodes:
  valve-plate:
    type: "component"
    urn: "URN:CNFX:ME:VALVE_PLATE"
    interface_type: "physical-logic-coupled"
  valve-spring:
    type: "component"
    urn: "URN:CNFX:ME:VALVE_SPRING"
    interface_type: "physical-logic-coupled"
  valve-seat:
    type: "component"
    urn: "URN:CNFX:ME:VALVE_SEAT"
    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/valves.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "4dc2784dd660aa0a75cba6cbcbf00d0e9f9aaf5d0d0ad3b77536068f4a853f76"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Valves

## 1. Technical Definition
Flow control devices in compressors that regulate the intake and discharge of gases or fluids.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-350 bar differential pressure, -196°C to 650°C temperature**. Failure boundary: **Material yield strength exceeded at 550 MPa stress or 0.3 mm seat deformation**, Mechanism: **Cavitation-induced erosion at vapor pressure threshold of 0.023 bar absolute or thermal fatigue from ΔT&gt;200°C cyclic loading**.

### 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 |
| :--- | :--- | :--- | :--- |
| Particulate contamination exceeding 25 μm particle size | 8 | Seat galling and leakage rate &gt;0.01% of Cv | Install dual 10 μm absolute filters with differential pressure monitoring |
| Actuator torque exceeding 120% of rated Nm due to stiction | 8 | Stem shear failure at 345 MPa torsional stress | Implement piezoelectric torque sensors with 0.1 Nm resolution and automatic lubrication |

## 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**: **Compressor Unit**, **Pressure Regulator**, **Flow Meter**  
**Downstream Applications**: Industrial Air Compressors, HVAC Systems, Process Piping Systems  

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

### Q: What materials are best for compressor valves in harsh industrial environments?
**A**: Stainless steel offers corrosion resistance for demanding applications, bronze provides durability with good thermal conductivity, while polymer composites reduce weight and resist chemical degradation.

### Q: How do valve components like plates, springs, and seats work together in compressors?
**A**: The valve plate controls flow opening/closing, the spring ensures proper return timing, and the seat provides a tight seal—together they regulate gas/fluid intake and discharge efficiently.

### Q: What specifications should I consider when selecting valves for machinery manufacturing equipment?
**A**: Key specs include pressure ratings, temperature tolerance, flow capacity, material compatibility with gases/fluids, and compliance with industry standards like ASME or ISO for safety and performance.

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

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

### 🌐 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**: VALVES | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: feddb0c8
