---
title: "Drain Valve (optional)"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DRAIN_VALVE_OPTIONAL"
  data_integrity_hash: "69db7792f4e9bdbcf6b43623b7aa0ef0"
  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:DRAIN_VALVE_OPTIONAL"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drain-valve-optional.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drain-valve-optional"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-16 bar (232 psi)"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 18
    unit: "bar"
    consequence: "Yield strength exceedance of valve body material (brass: 125 MPa, stainless steel 316: 205 MPa) causing permanent deformation and seal failure"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Electrochemical corrosion from acidic condensate (pH &lt; 4.5)"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "316L stainless steel construction with PTFE seals"
  - node_2:
      trigger: "Water hammer pressure spike exceeding 1.5x system pressure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integral pressure relief orifice (1.5 mm diameter) with surge arrestor upstream"
bom_nodes:
  valve-body:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_BODY"
    interface_type: "physical-logic-coupled"
  drain-port:
    type: "component"
    urn: "URN:CNFX:ME:DRAIN_PORT"
    interface_type: "physical-logic-coupled"
  sealo-ring:
    type: "component"
    urn: "URN:CNFX:ME:SEALO_RING"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 5208:2015 (INDUSTRIAL VALVES - PRESSURE TESTING OF VALVES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/ASME B16.34:2020 (VALVES - FLANGED, THREADED, AND WELDING END)"
    scope: "Verified Engineering Specification"
  - standard: "DIN EN 12266-1:2012 (INDUSTRIAL VALVES - TESTING OF METALLIC VALVES)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/drain-valve-optional.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "1f48b43888ec309a9ccb62e5dd9ba9c5da7e865bb5e7531bec2c3ce2b4cb14d0"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Drain Valve (optional)

## 1. Technical Definition
An optional valve installed on an air distribution manifold to drain accumulated condensate or liquids from the system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-16 bar (232 psi)**. Failure boundary: **18 bar (261 psi) burst pressure for brass body, 22 bar (319 psi) for stainless steel**, Mechanism: **Yield strength exceedance of valve body material (brass: 125 MPa, stainless steel 316: 205 MPa) causing permanent deformation and seal failure**.

### 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 |
| :--- | :--- | :--- | :--- |
| Electrochemical corrosion from acidic condensate (pH &lt; 4.5) | 8 | Valve seat pitting and leakage | 316L stainless steel construction with PTFE seals |
| Water hammer pressure spike exceeding 1.5x system pressure | 8 | Diaphragm rupture at 25 bar (363 psi) | Integral pressure relief orifice (1.5 mm diameter) with surge arrestor upstream |

## 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**: **Air Compressor**, **Air Distribution Manifold**, **Condensate Separator**  
**Downstream Applications**: Compressed Air Systems, Pneumatic Machinery, Industrial Process Equipment  

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

### Q: What is the purpose of an optional drain valve in machinery?
**A**: An optional drain valve is installed on air distribution manifolds to remove accumulated condensate or liquids, preventing corrosion and maintaining optimal system performance in machinery and equipment manufacturing.

### Q: Which materials are available for these drain valves?
**A**: These drain valves are typically made from brass for general use, stainless steel for corrosive environments, or plastic (like Nylon) for lightweight, cost-effective applications in industrial settings.

### Q: How does the drain valve work in an air distribution system?
**A**: The valve, consisting of a body, drain port, and seal/O-ring, allows manual or automatic drainage of liquids that accumulate in the manifold, ensuring dry, clean air flow and preventing damage to downstream equipment.

## 6. Manufacturing Compliance
- ISO 5208:2015 (INDUSTRIAL VALVES - PRESSURE TESTING OF VALVES)
- ANSI/ASME B16.34:2020 (VALVES - FLANGED, THREADED, AND WELDING END)
- DIN EN 12266-1:2012 (INDUSTRIAL VALVES - TESTING OF METALLIC VALVES)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Drain Valve (optional)](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/drain-valve-optional)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: DRAIN_VALVE_OPTIONAL | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 9e4abd73
