---
title: "Steam Generator Feedwater Control Valve Trim"
industry: "Manufacture of Steam Generators, Except Central Heating Hot Water Boilers"
verification_protocol:
  urn: "URN:CNFX:ME:STEAM_GENERATOR_FEEDWATER_CONTROL_VALVE_TRIM"
  data_integrity_hash: "9f71e46920db66e4ac5e117cbe579d4e"
  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_FEEDWATER_CONTROL_VALVE_TRIM"
  data_source_uri: "https://cnfx.com/llms/industry/manufacture-steam-generators/product/steam-generator-feedwater-control-valve-trim.md"
  official_resource_url: "https://cnfx.com/industry/manufacture-steam-generators/product/steam-generator-feedwater-control-valve-trim"
  is_verified_logic: true
attributes:
  pressure_rating:
    status: "config-dependent"
    typical_range: "0.5-25.0 bar"
    unit: "bar"
  flow_coefficient:
    status: "config-dependent"
    typical_range: "0.5-25.0 bar differential pressure, 0-100% valve position, 5-150°C fluid temperature"
    unit: "Cv"
engineering_limits:
  max_safe_operating_point:
    value: 45
    unit: "m"
    consequence: "Cavitation-induced erosion from localized pressure drops below vapor pressure, causing microjet impingement at 500-1000 m/s on trim surfaces"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Feedwater chemistry deviation with dissolved oxygen &gt; 20 ppb"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Trim material upgrade to cobalt-chromium-tungsten alloy with 55 HRC minimum hardness"
  - node_2:
      trigger: "Thermal shock from 50°C/min feedwater temperature transients"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Thermal barrier coating with 0.3 mm yttria-stabilized zirconia layer on trim surfaces"
bom_nodes:
  valve-plug:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_PLUG"
    interface_type: "physical-logic-coupled"
  valve-seat:
    type: "component"
    urn: "URN:CNFX:ME:VALVE_SEAT"
    interface_type: "physical-logic-coupled"
  stem-connection:
    type: "component"
    urn: "URN:CNFX:ME:STEM_CONNECTION"
    interface_type: "physical-logic-coupled"
  cage-guide:
    type: "component"
    urn: "URN:CNFX:ME:CAGE_GUIDE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5208:2015 (INDUSTRIAL VALVES - PRESSURE TESTING OF VALVES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/manufacture-steam-generators/product/steam-generator-feedwater-control-valve-trim.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "41fd518d94b3279f483475b54c1e48900c0ae2f0dbbab2bfc335f7d7c9cecb23"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Steam Generator Feedwater Control Valve Trim

## 1. Technical Definition
Precision flow control assembly for regulating boiler feedwater in industrial steam generation systems.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-25.0 bar differential pressure, 0-100% valve position, 5-150°C fluid temperature**. Failure boundary: **Cavitation index &lt; 2.0, trim velocity &gt; 45 m/s, seat contact stress &gt; 345 MPa**, Mechanism: **Cavitation-induced erosion from localized pressure drops below vapor pressure, causing microjet impingement at 500-1000 m/s on trim surfaces**.

### 2.1 Analytical Physics Model
Governed by the **Darcy-Weisbach Pressure Drop**:

> **Primary Equation**: $\Delta P = f \cdot \frac{L}{D} \cdot \frac{\rho v^2}{2}$  
> **Engineering Impact**: Critical for sizing CIP (Clean-In-Place) pump heads.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| f | Friction Factor | Engineering Constant |
| L | Pipe Length | Engineering Constant |
| v | Velocity | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Feedwater chemistry deviation with dissolved oxygen &gt; 20 ppb | 8 | Flow coefficient degradation from 0.65 to &lt;0.45 due to progressive trim erosion | Trim material upgrade to cobalt-chromium-tungsten alloy with 55 HRC minimum hardness |
| Thermal shock from 50°C/min feedwater temperature transients | 8 | Trim seat distortion exceeding 0.025 mm flatness tolerance | Thermal barrier coating with 0.3 mm yttria-stabilized zirconia layer on trim surfaces |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| pressure_rating | Config-dependent | bar | Verified |
| flow_coefficient | Config-dependent | Cv | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Valve Plug](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/valve-plug.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **High-Pressure Boiler Feed Pump**, **Deaerator System**, **Condensate Return System**  
**Downstream Applications**: Industrial Steam, Process Steam, Power Generation Steam  

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

### Q: What materials are used in this steam generator feedwater control valve trim?
**A**: This valve trim is constructed from premium materials including Stainless Steel 316, Stellite 6, and Inconel 625 for superior corrosion resistance and durability in high-temperature steam environments.

### Q: What are the key specifications for this feedwater control valve trim?
**A**: Key specifications include flow characteristic type, flow coefficient (Cv), ANSI/FCI leakage class, pressure rating in bar, temperature rating in °C, and valve size in inches for precise boiler feedwater regulation.

### Q: What components are included in the BOM for this valve trim?
**A**: The bill of materials includes four essential components: Cage Guide, Stem Connection, Valve Plug, and Valve Seat, all designed to work together for optimal flow control in steam generation systems.

## 6. Manufacturing Compliance
- ISO 5208:2015 (INDUSTRIAL VALVES - PRESSURE TESTING OF VALVES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Steam Generator Feedwater Control Valve Trim](https://cnfx.com/industry/manufacture-steam-generators/product/steam-generator-feedwater-control-valve-trim)**

### 🌐 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_FEEDWATER_CONTROL_VALVE_TRIM | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 620fcf20
