---
title: "Diaphragm Head"
industry: "Machinery and Equipment Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:DIAPHRAGM_HEAD"
  data_integrity_hash: "44ef5f5ca74941207697e77d5d929bf3"
  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:DIAPHRAGM_HEAD"
  data_source_uri: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/diaphragm-head.md"
  official_resource_url: "https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/diaphragm-head"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0.1-100 bar"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 120
    unit: "bar"
    consequence: "Yield strength of PTFE diaphragm material (23 MPa) exceeded, causing plastic deformation and rupture"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Chemical incompatibility with 30% sulfuric acid solution"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Material substitution to EPDM elastomer with 0.5 mm thickness"
  - node_2:
      trigger: "Cavitation from 85°C fluid temperature exceeding vapor pressure"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Positive suction head of 2.5 m maintained with NPSHr of 1.8 m"
bom_nodes:
  diaphragm-membrane:
    type: "component"
    urn: "URN:CNFX:ME:DIAPHRAGM_MEMBRANE"
    interface_type: "physical-logic-coupled"
  head-housing:
    type: "component"
    urn: "URN:CNFX:ME:HEAD_HOUSING"
    interface_type: "physical-logic-coupled"
  valve-assembly:
    type: "part"
    urn: "URN:CNFX:ME:VALVE_ASSEMBLY"
    interface_type: "physical-logic-coupled"
  sealing-gaskets:
    type: "component"
    urn: "URN:CNFX:ME:SEALING_GASKETS"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
url: "https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/diaphragm-head.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "167abb4efa0b760da7eac548141faf506ae3a7638886a287c255cd217dd0b301"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Diaphragm Head

## 1. Technical Definition
The diaphragm head is the core component of a chemical dosing pump that houses the diaphragm and creates the pumping action through reciprocating motion.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.1-100 bar**. Failure boundary: **120 bar differential pressure**, Mechanism: **Yield strength of PTFE diaphragm material (23 MPa) exceeded, causing plastic deformation and rupture**.

### 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 |
| :--- | :--- | :--- | :--- |
| Chemical incompatibility with 30% sulfuric acid solution | 8 | Diaphragm polymer degradation and embrittlement | Material substitution to EPDM elastomer with 0.5 mm thickness |
| Cavitation from 85°C fluid temperature exceeding vapor pressure | 8 | Pitting erosion on diaphragm surface | Positive suction head of 2.5 m maintained with NPSHr of 1.8 m |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

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

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Chemical Storage Tank**, **Dosing Pump Controller**, **Pressure Relief Valve**  
**Downstream Applications**: Water Treatment Systems, Pharmaceutical Manufacturing Equipment, Food Processing Machinery  

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

### Q: What materials are available for diaphragm heads in chemical dosing pumps?
**A**: Diaphragm heads are commonly made from PTFE, Stainless Steel (316L), PVDF, or EPDM to ensure chemical resistance and durability in various industrial applications.

### Q: How does a diaphragm head create pumping action in a dosing pump?
**A**: The diaphragm head houses the diaphragm and uses reciprocating motion to flex the diaphragm, creating suction and discharge cycles that precisely meter chemical fluids.

### Q: What are the main components of a diaphragm head assembly?
**A**: A diaphragm head assembly typically includes the diaphragm membrane, head housing, valve assembly, and sealing gaskets, all working together to ensure leak-free operation.

## 6. Manufacturing Compliance

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### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Diaphragm Head](https://cnfx.com/industry/machinery-and-equipment-manufacturing/product/diaphragm-head)**

### 🌐 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**: DIAPHRAGM_HEAD | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: cc8b574a
