---
title: "Pressure Limiter Valve"
industry: "Motor Vehicle Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:PRESSURE_LIMITER_VALVE"
  data_integrity_hash: "d565bd7da52be74912f024030ad6c427"
  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_LIMITER_VALVE"
  data_source_uri: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/pressure-limiter-valve.md"
  official_resource_url: "https://cnfx.com/industry/motor-vehicle-manufacturing/product/pressure-limiter-valve"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "1500-2000 bar"
    unit: "bar"
engineering_limits:
  max_safe_operating_point:
    value: 2200
    unit: "bar"
    consequence: "Spring fatigue failure due to cyclic loading beyond yield strength (σ_y = 1200 MPa for 17-4PH stainless steel) at 10^7 cycles"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Fuel contamination with particulate matter &gt; 5 μm"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install 3 μm absolute filtration upstream with differential pressure monitoring"
  - node_2:
      trigger: "Thermal cycling between -40°C and 150°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Material pairing: Invar 36 spring housing with 316L stainless steel valve body (CTE mismatch &lt; 2×10^-6/°C)"
bom_nodes:
  valve-body:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_BODY"
    interface_type: "physical-logic-coupled"
  pressure-spring:
    type: "component"
    urn: "URN:CNFX:ME:PRESSURE_SPRING"
    interface_type: "physical-logic-coupled"
  pistonplunger:
    type: "component"
    urn: "URN:CNFX:ME:PISTONPLUNGER"
    interface_type: "physical-logic-coupled"
  seals:
    type: "component"
    urn: "URN:CNFX:ME:SEALS"
    interface_type: "physical-logic-coupled"
  return-port:
    type: "component"
    urn: "URN:CNFX:ME:RETURN_PORT"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/pressure-limiter-valve.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "8fb1e9535c6c4d17c06e9265bdd9b29cb6227e2b9bd70eb1d628682df05cd4af"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Pressure Limiter Valve

## 1. Technical Definition
A safety valve in Common Rail fuel injection systems that prevents excessive pressure buildup by diverting excess fuel back to the tank.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **1500-2000 bar**. Failure boundary: **2200 bar (spring compression limit + 10% safety margin)**, Mechanism: **Spring fatigue failure due to cyclic loading beyond yield strength (σ_y = 1200 MPa for 17-4PH stainless steel) at 10^7 cycles**.

### 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 |
| :--- | :--- | :--- | :--- |
| Fuel contamination with particulate matter &gt; 5 μm | 8 | Valve seat erosion leading to continuous fuel bypass | Install 3 μm absolute filtration upstream with differential pressure monitoring |
| Thermal cycling between -40°C and 150°C | 8 | Differential thermal expansion causing spring binding | Material pairing: Invar 36 spring housing with 316L stainless steel valve body (CTE mismatch &lt; 2×10^-6/°C) |

## 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**: **Fuel Pressure Test Bench**, **High-Precision CNC Machining Center**, **Automated Assembly Line with Vision Inspection**  
**Downstream Applications**: Common Rail Fuel Injection System, Diesel Engine Assembly, Complete Motor Vehicle  

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

### Q: What is the primary function of a pressure limiter valve in Common Rail systems?
**A**: The pressure limiter valve acts as a safety device that prevents dangerous pressure buildup in Common Rail fuel injection systems by diverting excess fuel back to the tank when pressure exceeds safe operating limits.

### Q: Why are stainless steel and spring steel used in pressure limiter valves?
**A**: Stainless steel provides corrosion resistance against diesel fuel, while spring steel offers the precise tension and durability needed for consistent pressure regulation in demanding automotive environments.

### Q: How does the pressure limiter valve integrate with other Common Rail components?
**A**: The valve connects between the high-pressure pump and fuel rail, monitoring system pressure through its piston/plunger mechanism. When pressure exceeds the spring's calibrated threshold, it opens the return port to safely relieve excess fuel.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Pressure Limiter Valve](https://cnfx.com/industry/motor-vehicle-manufacturing/product/pressure-limiter-valve)**

### 🌐 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_LIMITER_VALVE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 2bba75a5
