Industry-Verified Manufacturing Data (2026)

Venturi Nozzle

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Venturi Nozzle used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Venturi Nozzle is characterized by the integration of Converging Section and Throat. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A specialized nozzle that uses the Venturi effect to create vacuum pressure by accelerating fluid flow through a constricted section.

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Product Specifications

Technical details and manufacturing context for Venturi Nozzle

Definition
A critical component of vacuum generators that converts compressed air or other fluid energy into vacuum pressure through the Venturi principle, where fluid velocity increases and pressure decreases as it passes through a constricted throat section, creating suction at the inlet.
Working Principle
Compressed air enters the nozzle and accelerates through a converging section, reaching maximum velocity at the throat where pressure drops below atmospheric pressure, creating vacuum suction. The air then expands through a diverging section, recovering pressure while maintaining the vacuum effect.
Common Materials
Stainless Steel, Brass, Aluminum, Engineering Plastics
Technical Parameters
  • Throat diameter - critical dimension determining vacuum performance and flow characteristics (mm) Per Request
Components / BOM
  • Converging Section
    Accelerates incoming fluid to increase velocity and decrease pressure
    Material: Stainless Steel
  • Throat
    Minimum cross-sectional area where maximum velocity and minimum pressure occur, creating vacuum
    Material: Stainless Steel
  • Diverging Section
    Gradually expands flow to recover pressure while maintaining vacuum effect
    Material: Stainless Steel
  • Vacuum Port
    Connection point for vacuum hose or fitting where suction is applied
    Material: Brass
Engineering Reasoning
0.5-15 bar inlet pressure, 0.1-0.8 bar vacuum pressure
Inlet pressure > 20 bar OR vacuum pressure < 0.05 bar OR flow velocity > 150 m/s
Design Rationale: Cavitation at throat section when local pressure drops below fluid vapor pressure (typically 0.023 bar for water at 20°C), causing vapor bubble collapse and material erosion
Risk Mitigation (FMEA)
Trigger Particulate contamination > 50 μm in fluid stream
Mode: Throat erosion rate exceeds 0.1 mm/year, causing geometry distortion
Strategy: Install 10 μm absolute filtration upstream with differential pressure monitoring
Trigger Fluid temperature variation > ±15°C from design point
Mode: Viscosity change alters flow coefficient by >5%, reducing vacuum efficiency
Strategy: Integrate temperature-compensated flow control with PID regulation

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Venturi Nozzle.

industrial venturi vacuum nozzle stainless steel venturi nozzle machinery venturi effect nozzle brass venturi nozzle for equipment engineering plastic venturi nozzle

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Vacuum Generator
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar inlet pressure, vacuum up to 0.8 bar
flow rate: 0.5 to 500 L/min (water equivalent)
temperature: -40°C to 150°C (dependent on material)
slurry concentration: Up to 15% solids by weight (particle size < 100 microns)
Media Compatibility
✓ Compressed air systems ✓ Water-based fluids ✓ Chemical transfer applications
Unsuitable: High-viscosity fluids (>500 cP) or abrasive slurries
Sizing Data Required
  • Required vacuum pressure (mbar)
  • Available motive fluid flow rate (L/min)
  • System pressure drop allowance (bar)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive erosion
Cause: High-velocity flow of particulate-laden fluids causing gradual material loss at the throat and downstream sections, leading to dimensional changes and reduced efficiency.
Cavitation
Cause: Local pressure drop below vapor pressure at the throat causing bubble formation and violent collapse, resulting in pitting, vibration, and structural damage to nozzle surfaces.
Maintenance Indicators
  • Audible high-frequency whistling or vibration indicating flow separation or cavitation
  • Visible external leaks or moisture around flange connections signaling gasket failure or corrosion
Engineering Tips
  • Install upstream filtration to remove particulates and implement regular ultrasonic thickness testing to monitor erosion rates
  • Maintain system pressure above vapor pressure through proper pump selection and control valves, and use cavitation-resistant materials like hardened stainless steel

Compliance & Manufacturing Standards

Reference Standards
ISO 5167-3: Measurement of fluid flow by means of pressure differential devices - Venturi nozzles ASME MFC-3M: Measurement of Fluid Flow in Pipes Using Orifice, Nozzle, and Venturi DIN 1952: Flow measurement with orifice plates, nozzles and Venturi tubes
Manufacturing Precision
  • Throat diameter: +/-0.1% of nominal diameter
  • Surface finish: Ra ≤ 0.8 μm in throat section
Quality Inspection
  • Dimensional verification using coordinate measuring machine (CMM)
  • Pressure test to verify structural integrity and leak tightness

Factories Producing Venturi Nozzle

Verified manufacturers with capability to produce this product in China

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✓ 94% Supplier Capability Match Found

S Sourcing Manager from United Arab Emirates Jan 28, 2026
★★★★★
"Testing the Venturi Nozzle now; the technical reliability results are within 1% of the laboratory datasheet."
Technical Specifications Verified
P Procurement Specialist from Australia Jan 25, 2026
★★★★☆
"Impressive build quality. Especially the technical reliability is very stable during long-term operation. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Singapore Jan 22, 2026
★★★★★
"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Venturi Nozzle meets all ISO standards."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

10 sourcing managers are analyzing this specification now. Last inquiry for Venturi Nozzle from Germany (1h ago).

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Frequently Asked Questions

How does a Venturi nozzle create vacuum pressure in machinery applications?

A Venturi nozzle accelerates fluid through a constricted throat section, creating a pressure drop that generates vacuum at the vacuum port, ideal for industrial suction or pneumatic systems.

What materials are best for Venturi nozzles in harsh industrial environments?

Stainless steel offers corrosion resistance for wet or chemical applications, while engineering plastics provide lightweight, cost-effective options for less abrasive conditions.

What are the key components in a Venturi nozzle BOM for manufacturing?

The bill of materials includes the converging section (inlet), throat (constriction), diverging section (outlet), and vacuum port, all precision-machined for optimal flow and vacuum performance.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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