---
title: "Steam Generator Pressure Relief Valve Assembly"
industry: "Manufacture of Steam Generators, Except Central Heating Hot Water Boilers"
verification_protocol:
  urn: "URN:CNFX:ME:STEAM_GENERATOR_PRESSURE_RELIEF_VALVE_ASSEMBLY"
  data_integrity_hash: "df4ce758ed8316651f167b4444ff0aa8"
  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:STEAM_GENERATOR_PRESSURE_RELIEF_VALVE_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/manufacture-steam-generators/product/steam-generator-pressure-relief-valve-assembly.md"
  official_resource_url: "https://cnfx.com/industry/manufacture-steam-generators/product/steam-generator-pressure-relief-valve-assembly"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0.1-25.0 bar"
    unit: "bar"
  secondary_spec:
    status: "config-dependent"
    typical_range: "0.1-25.0 bar"
    unit: "kg/h"
engineering_limits:
  max_safe_operating_point:
    value: 27.5
    unit: "bar"
    consequence: "Yield strength exceedance of ASTM A216 WCB carbon steel at 204°C (400°F) operating temperature, where σ_yield = 250 MPa"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Corrosion-induced pitting from chloride stress corrosion cracking in 316L stainless steel components"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Cathodic protection system with -0.85V vs. SCE reference electrode potential"
  - node_2:
      trigger: "Thermal fatigue from 150-204°C (302-400°F) cyclic temperature differentials"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Inconel 718 spring material with ΔT_max = 55°C (100°F) thermal shock resistance"
bom_nodes:
  valve-body:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_BODY"
    interface_type: "physical-logic-coupled"
  spring-assembly:
    type: "component"
    urn: "URN:CNFX:ME:SPRING_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  disc-and-seat:
    type: "component"
    urn: "URN:CNFX:ME:DISC_AND_SEAT"
    interface_type: "physical-logic-coupled"
  bonnet:
    type: "component"
    urn: "URN:CNFX:ME:BONNET"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/manufacture-steam-generators/product/steam-generator-pressure-relief-valve-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "7f63b56356c11149b9b8d9f93095170b1608e69d4363486eabf82e15ac9a3c15"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Steam Generator Pressure Relief Valve Assembly

## 1. Technical Definition
Safety valve assembly for industrial steam generators that prevents overpressure conditions.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-25.0 bar**. Failure boundary: **27.5 bar (110% of maximum allowable working pressure)**, Mechanism: **Yield strength exceedance of ASTM A216 WCB carbon steel at 204°C (400°F) operating temperature, where σ_yield = 250 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 |
| :--- | :--- | :--- | :--- |
| Corrosion-induced pitting from chloride stress corrosion cracking in 316L stainless steel components | 8 | Valve seat leakage at 0.5 bar below set pressure | Cathodic protection system with -0.85V vs. SCE reference electrode potential |
| Thermal fatigue from 150-204°C (302-400°F) cyclic temperature differentials | 8 | Spring relaxation causing 10% reduction in set pressure over 1000 cycles | Inconel 718 spring material with ΔT_max = 55°C (100°F) thermal shock resistance |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | bar | Verified |
| secondary_spec | Config-dependent | kg/h | 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**: **Steam Pressure Test Bench**, **Valve Calibration System**, **Leak Detection Equipment**  
**Downstream Applications**: Industrial Steam Generators, Power Plant Boiler Systems, Process Heating Equipment  

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

### Q: What materials are used in this steam generator pressure relief valve assembly?
**A**: This assembly is constructed from premium materials including Stainless Steel 316, Inconel 625 for high-temperature resistance, and high-temperature elastomers for reliable sealing and durability in demanding industrial environments.

### Q: What is the purpose of the blowdown pressure setting?
**A**: The blowdown pressure setting determines the pressure differential between when the valve opens (set pressure) and when it reseats. Proper blowdown adjustment ensures the valve closes securely after relieving excess pressure, preventing steam waste and maintaining system stability.

### Q: How does this valve assembly prevent overpressure conditions in steam generators?
**A**: When steam pressure exceeds the predetermined set pressure, the spring-loaded mechanism activates, lifting the disc from the seat to release excess pressure. This automatic safety response protects the steam generator from dangerous overpressure conditions that could lead to equipment failure or safety hazards.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Steam Generator Pressure Relief Valve Assembly](https://cnfx.com/industry/manufacture-steam-generators/product/steam-generator-pressure-relief-valve-assembly)**

### 🌐 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**: STEAM_GENERATOR_PRESSURE_RELIEF_VALVE_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 58d399b0
