---
title: "Safety Valve"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SAFETY_VALVE"
  data_integrity_hash: "1c8228b6840856d7589954ce32914e7e"
  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:SAFETY_VALVE"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-valve.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/safety-valve"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-150 bar"
    unit: "bar"
engineering_limits:
  max_safe_operating_point:
    value: 1.5
    unit: "x"
    consequence: "Yield strength exceedance of ASTM A193 B7 spring steel (minimum 860 MPa) causing permanent set, preventing reseating at set pressure"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Corrosive gas exposure (e.g., H2S concentration &gt;50 ppm)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Inconel 625 seat material with 0.02% maximum carbon content"
  - node_2:
      trigger: "Cyclic pressure loading at 85-100% of set pressure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Shot-peened spring surface with compressive residual stress &gt;400 MPa"
bom_nodes:
  valve-body:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_BODY"
    interface_type: "physical-logic-coupled"
  spring:
    type: "component"
    urn: "URN:CNFX:ME:SPRING"
    interface_type: "physical-logic-coupled"
  valve-disc:
    type: "component"
    urn: "URN:CNFX:ME:VALVE_DISC"
    interface_type: "physical-logic-coupled"
  adjustment-screw:
    type: "component"
    urn: "URN:CNFX:ME:ADJUSTMENT_SCREW"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/safety-valve.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "bddbf01c78e1b022fc83ffe5206e35437b6179471775441b403f5e0425974f93"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Safety Valve

## 1. Technical Definition
A pressure relief device designed to automatically release excess pressure from a gas cylinder or generator to prevent catastrophic failure.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-150 bar**. Failure boundary: **Spring compression exceeding Hooke's Law elastic limit at 1.5x design pressure (225 bar for 150 bar valve)**, Mechanism: **Yield strength exceedance of ASTM A193 B7 spring steel (minimum 860 MPa) causing permanent set, preventing reseating at set pressure**.

### 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 |
| :--- | :--- | :--- | :--- |
| Corrosive gas exposure (e.g., H2S concentration &gt;50 ppm) | 8 | Stress corrosion cracking in valve seat (316L stainless steel) | Inconel 625 seat material with 0.02% maximum carbon content |
| Cyclic pressure loading at 85-100% of set pressure | 8 | High-cycle fatigue failure at spring coil root stress concentration | Shot-peened spring surface with compressive residual stress &gt;400 MPa |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | bar | 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)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Pressure Testing Bench**, **Leak Detection System**, **Calibration Equipment**  
**Downstream Applications**: Industrial Gas Cylinders, Power Generation Systems, Process Control Equipment  

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

### Q: What materials are used in this safety valve construction?
**A**: This safety valve is constructed from durable stainless steel and brass components, providing corrosion resistance and long-term reliability in industrial environments.

### Q: How does the safety valve prevent equipment failure?
**A**: The valve automatically releases excess pressure from gas cylinders or generators when preset limits are exceeded, preventing catastrophic failure and ensuring operational safety.

### Q: What are the main components of this safety valve?
**A**: Key components include the valve body, spring, valve disc, and adjustment screw, allowing for precise pressure calibration and reliable performance in machinery applications.

## 6. Manufacturing Compliance

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

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **4** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: SAFETY_VALVE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: be957fe6
