Industry-Verified Manufacturing Data (2026)

Diverging Section (Outlet)

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Diverging Section (Outlet) 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 Diverging Section (Outlet) is characterized by the integration of Flange Connection and Reinforcement Rings. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel (e.g., 304, 316) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

The diverging section at the outlet of a Venturi scrubber where gas velocity decreases and pressure recovers.

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Product Specifications

Technical details and manufacturing context for Diverging Section (Outlet)

Definition
The diverging section, located at the outlet of a Venturi scrubber, is a conical or gradually expanding duct designed to slow down the high-velocity gas-liquid mixture exiting the throat. This deceleration converts kinetic energy back into pressure energy (pressure recovery), reducing overall system pressure drop. It also promotes droplet separation from the gas stream through centrifugal force and impaction, enhancing particulate and pollutant removal efficiency before the gas exits the scrubber.
Working Principle
As the gas-liquid mixture enters the diverging section from the narrow throat, the cross-sectional area increases, causing the gas velocity to decrease according to the continuity equation (A1V1 = A2V2). This deceleration reduces dynamic pressure and increases static pressure (Bernoulli's principle). The reduced velocity allows larger droplets to settle or be separated by inertial forces, while the pressure recovery minimizes energy consumption of the exhaust fan.
Common Materials
Stainless Steel (e.g., 304, 316), Carbon Steel, Fiber-Reinforced Plastic (FRP), Polypropylene (PP)
Technical Parameters
  • Divergence angle, typically 7-15°, affecting pressure recovery and separation efficiency (degrees) Per Request
Components / BOM
  • Flange Connection
    Connects diverging section to downstream ducting or separation equipment
    Material: Same as main body (e.g., stainless steel)
  • Reinforcement Rings
    Provides structural support to prevent deformation under pressure
    Material: Steel
  • Drain Port
    Optional port for draining collected liquid from the section
    Material: Stainless steel or plastic
Engineering Reasoning
0.5-2.5 m/s gas velocity, 0.95-1.05 bar outlet pressure
Gas velocity drops below 0.3 m/s causing liquid droplet settling, or exceeds 3.0 m/s causing re-entrainment
Design Rationale: Boundary layer separation at divergence angles >15° causing flow reversal and pressure drop below 0.9 bar
Risk Mitigation (FMEA)
Trigger Sudden upstream gas flow reduction from 100% to 30% in <2 seconds
Mode: Liquid accumulation exceeding 15 mm depth in diverging section
Strategy: Install 45° angled drainage weirs with 25 mm diameter outlets at 500 mm intervals
Trigger Corrosive gas composition with HCl concentration >200 ppm at 60°C
Mode: 316L stainless steel wall thinning from 6 mm to <2 mm in 6 months
Strategy: Apply 3 mm thick PTFE lining with 0.5 mm glass fiber reinforcement

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Diverging Section (Outlet).

Venturi scrubber diverging outlet section stainless steel diverging section for scrubbers pressure recovery diverging section industrial FRP diverging section Venturi outlet custom diverging section with flange connection

Applied To / Applications

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

Venturi Scrubber
View system integration details

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10 bar (gauge)
flow rate: 0.5 to 50 m³/s (gas)
temperature: -20°C to 150°C
slurry concentration: Up to 15% solids by weight
Media Compatibility
✓ Flue gas with particulate matter ✓ Chemical process gases with entrained droplets ✓ Wet scrubber exhaust streams
Unsuitable: High-temperature corrosive gases above 150°C
Sizing Data Required
  • Inlet gas flow rate (m³/s)
  • Required pressure recovery efficiency (%)
  • Outlet duct diameter constraints (mm)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive erosion
Cause: High-velocity flow carrying solid particles (e.g., sand, debris) that gradually wear away the internal surfaces, particularly at bends and transitions, leading to material loss and potential leaks.
Cavitation
Cause: Rapid pressure drops in the diverging section causing vapor bubble formation and subsequent violent collapse, which pits and damages the metal surfaces, often due to improper design or operating conditions.
Maintenance Indicators
  • Unusual vibration or audible knocking sounds indicating flow instability or cavitation
  • Visible external leaks or surface discoloration (e.g., rust streaks) suggesting internal erosion or corrosion
Engineering Tips
  • Implement regular ultrasonic thickness testing to monitor wall erosion and schedule proactive replacements before failure occurs
  • Optimize flow conditions by ensuring proper upstream filtration to remove abrasives and maintaining design pressure ranges to prevent cavitation

Compliance & Manufacturing Standards

Reference Standards
ISO 5167-1:2022 Measurement of fluid flow by means of pressure differential devices ANSI/ASME B16.5 Pipe Flanges and Flanged Fittings DIN 2633 Welding neck flanges
Manufacturing Precision
  • Bore diameter: +/-0.05mm
  • Flange flatness: 0.08mm across entire surface
Quality Inspection
  • Dimensional verification using CMM (Coordinate Measuring Machine)
  • Pressure testing to verify flow characteristics and structural integrity

Factories Producing Diverging Section (Outlet)

Verified manufacturers with capability to produce this product in China

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✓ 96% Supplier Capability Match Found

S Sourcing Manager from Australia Jan 16, 2026
★★★★★
"Found 54+ suppliers for Diverging Section (Outlet) on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Procurement Specialist from Singapore Jan 13, 2026
★★★★☆
"The technical documentation for this Diverging Section (Outlet) is very thorough, especially regarding technical reliability. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Germany Jan 10, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Diverging Section (Outlet) so far."
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.”

7 sourcing managers are analyzing this specification now. Last inquiry for Diverging Section (Outlet) from India (44m ago).

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Frequently Asked Questions

What is the primary function of a diverging section in a Venturi scrubber outlet?

The diverging section at the outlet of a Venturi scrubber gradually expands the gas flow path, reducing velocity and converting kinetic energy back to pressure (pressure recovery), which improves system efficiency and minimizes energy loss.

Which materials are recommended for a diverging section in corrosive environments?

For corrosive environments, stainless steel (grades 304 or 316), fiber-reinforced plastic (FRP), or polypropylene (PP) are recommended due to their resistance to chemical degradation and moisture, ensuring durability and low maintenance.

What components are typically included in the BOM for a diverging section?

A standard bill of materials includes flange connections for secure piping integration, reinforcement rings for structural integrity under pressure changes, and a drain port to remove accumulated liquids or particulates, ensuring reliable operation.

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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