---
title: "Spring Assembly"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:SPRING_ASSEMBLY"
  data_integrity_hash: "5294573d202ed78b7207545662289fd4"
  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:SPRING_ASSEMBLY"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/spring-assembly.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/spring-assembly"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.5-25 bar (7.25-362.5 psi)"
    unit: "N/mm or bar/psi"
engineering_limits:
  max_safe_operating_point:
    value: 27.5
    unit: "bar"
    consequence: "Spring wire plastic deformation exceeding Hooke's Law linear elastic limit (σ_yield = 1720 MPa for ASTM A228), causing permanent set and loss of calibrated force"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Chloride ion concentration exceeding 250 ppm in process fluid at 60°C"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Replace ASTM A228 with Inconel 718 spring wire (Ni-Cr-Fe alloy) with chloride SCC threshold &gt;1000 ppm"
  - node_2:
      trigger: "Cyclic pressure fluctuations at 15 Hz with amplitude ±3 bar around setpoint"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Shot peening surface treatment to induce 400 MPa compressive residual stress layer"
bom_nodes:
  compression-spring:
    type: "component"
    urn: "URN:CNFX:ME:COMPRESSION_SPRING"
    interface_type: "physical-logic-coupled"
  spring-seatwasher:
    type: "component"
    urn: "URN:CNFX:ME:SPRING_SEATWASHER"
    interface_type: "physical-logic-coupled"
  adjustment-nutspacer:
    type: "component"
    urn: "URN:CNFX:ME:ADJUSTMENT_NUTSPACER"
    interface_type: "physical-logic-coupled"
  guide-or-retainer:
    type: "component"
    urn: "URN:CNFX:ME:GUIDE_OR_RETAINER"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 10243:2010 (COMPRESSION, EXTENSION AND TORSION SPRINGS - TECHNICAL SPECIFICATIONS)"
    scope: "Verified Engineering Specification"
  - standard: "DIN 2095 (CYLINDRICAL HELICAL COMPRESSION SPRINGS MADE FROM ROUND WIRE AND BAR - QUALITY SPECIFICATIONS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/spring-assembly.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "8727035359a67fee6acb89014b475e71fe17cbd2b8d9268ff35864d413ecdecc"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Spring Assembly

## 1. Technical Definition
A critical sub-assembly within a sanitary pressure relief valve that provides the calibrated force to maintain valve closure until the preset pressure threshold is exceeded.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-25 bar (7.25-362.5 psi)**. Failure boundary: **27.5 bar (398.75 psi) compressive yield stress of ASTM A228 music wire at 20°C**, Mechanism: **Spring wire plastic deformation exceeding Hooke's Law linear elastic limit (σ_yield = 1720 MPa for ASTM A228), causing permanent set and loss of calibrated force**.

### 2.1 Analytical Physics Model
Governed by the **Harmonic Vibration Force Generation**:

> **Primary Equation**: $F_e = m \cdot r \cdot \omega^2 \sin(\omega t)$  
> **Engineering Impact**: Calculates centrifugal force for vibratory sifters/feeders.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| m | Eccentric Mass | Engineering Constant |
| r | Radius | Engineering Constant |
| \omega | Angular Frequency | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Chloride ion concentration exceeding 250 ppm in process fluid at 60°C | 8 | Stress corrosion cracking initiating at surface micro-defects | Replace ASTM A228 with Inconel 718 spring wire (Ni-Cr-Fe alloy) with chloride SCC threshold &gt;1000 ppm |
| Cyclic pressure fluctuations at 15 Hz with amplitude ±3 bar around setpoint | 8 | High-cycle fatigue fracture at spring coil inner diameter stress concentration | Shot peening surface treatment to induce 400 MPa compressive residual stress layer |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | N/mm or bar/psi | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Spring Coiling Machine**, **Heat Treatment Furnace**, **Surface Finishing System**  
**Downstream Applications**: Sanitary Pressure Relief Valves, Process Control Valves, Safety Relief Devices  

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

### Q: What materials are used in this spring assembly for corrosion resistance?
**A**: The assembly uses 316L stainless steel for all metal components and food-grade elastomers for seals, providing excellent corrosion resistance in sanitary and high-moisture environments.

### Q: How does the adjustment nut affect valve performance?
**A**: The adjustment nut allows precise calibration of spring compression force, enabling accurate setting of the pressure threshold at which the relief valve opens for optimal system protection.

### Q: What maintenance is required for these spring assemblies?
**A**: Regular inspection for corrosion, wear on spring coils, and elastomer seal integrity is recommended. The modular BOM design allows easy replacement of individual components like springs or seats when needed.

## 6. Manufacturing Compliance
- ISO 10243:2010 (COMPRESSION, EXTENSION AND TORSION SPRINGS - TECHNICAL SPECIFICATIONS)
- DIN 2095 (CYLINDRICAL HELICAL COMPRESSION SPRINGS MADE FROM ROUND WIRE AND BAR - QUALITY SPECIFICATIONS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Spring Assembly](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/spring-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**: SPRING_ASSEMBLY | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 7ebe45c4
