---
title: "Pressure Relief Valves"
industry: "Food Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PRESSURE_RELIEF_VALVES"
  data_integrity_hash: "65039892f45e550e1fd303d768a53d0a"
  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:PRESSURE_RELIEF_VALVES"
  data_source_uri: "https://cnfx.com/llms/industry/food-manufacturing/product/pressure-relief-valves.md"
  official_resource_url: "https://cnfx.com/industry/food-manufacturing/product/pressure-relief-valves"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-10 bar (7.25-145 psi)"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 000
    unit: "cycles"
    consequence: "Hysteresis-induced spring relaxation following Hooke's Law (F=kx) and seat erosion from turbulent flow exceeding Reynolds number 4000"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Corrosive condensate accumulation with pH &lt;5.0"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate condensate drain trap with 0.5μm hydrophobic filter upstream"
  - node_2:
      trigger: "Thermal cycling between 4°C and 121°C sterilization cycles"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Replace with Kalrez 6375 seats (α=45×10⁻⁶/°C) rated for 2000+ cycles"
bom_nodes:
  valve-body:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_BODY"
    interface_type: "physical-logic-coupled"
  discplug:
    type: "component"
    urn: "URN:CNFX:ME:DISCPLUG"
    interface_type: "physical-logic-coupled"
  spring:
    type: "component"
    urn: "URN:CNFX:ME:SPRING"
    interface_type: "physical-logic-coupled"
  seat:
    type: "component"
    urn: "URN:CNFX:ME: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/food-manufacturing/product/pressure-relief-valves.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "64cd135091083751f8ed05d1f7619ee068c54e7cf74a3944ca697f7910a74ea6"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Pressure Relief Valves

## 1. Technical Definition
Safety devices that automatically release excess pressure from sterile air distribution systems to prevent overpressure damage.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-10 bar (7.25-145 psi)**. Failure boundary: **Spring fatigue at 1,000,000 cycles or seat leakage exceeding 0.1% of rated flow at 90% set pressure**, Mechanism: **Hysteresis-induced spring relaxation following Hooke's Law (F=kx) and seat erosion from turbulent flow exceeding Reynolds number 4000**.

### 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 condensate accumulation with pH &lt;5.0 | 8 | 316L stainless steel spring pitting corrosion at 0.1mm/year | Integrate condensate drain trap with 0.5μm hydrophobic filter upstream |
| Thermal cycling between 4°C and 121°C sterilization cycles | 8 | PTFE seat differential expansion (α=120×10⁻⁶/°C) causing 0.05mm permanent deformation | Replace with Kalrez 6375 seats (α=45×10⁻⁶/°C) rated for 2000+ cycles |

## 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)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Sterile Air Compressor**, **Pressure Regulator**, **Pressure Gauge**  
**Downstream Applications**: Sterilized Food Packaging, Aseptic Processed Foods, Clean Room Air Systems  

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

### Q: Why use 316L stainless steel for pressure relief valves in food manufacturing?
**A**: 316L stainless steel offers superior corrosion resistance, is easy to clean and sanitize, and meets food safety standards, making it ideal for sterile air systems in food processing.

### Q: How do pressure relief valves protect sterile air distribution systems?
**A**: They automatically open to release excess pressure when preset limits are exceeded, preventing equipment damage, maintaining system integrity, and ensuring continuous safe operation.

### Q: What maintenance is required for these pressure relief valves?
**A**: Regular inspection for wear, cleaning to prevent contamination, and periodic testing to ensure proper set pressure and sealing function are essential for reliable performance.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Pressure Relief Valves](https://cnfx.com/industry/food-manufacturing/product/pressure-relief-valves)**

### 🌐 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**: PRESSURE_RELIEF_VALVES | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 6bb405df
