Structured Manufacturing Data (2026)

Overflow Weir or Nozzle

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Overflow Weir or 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 Overflow Weir or Nozzle is characterized by the integration of Weir Plate / Nozzle Body and Mounting Flange / Threads. 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.

A component of a water collection sump designed to manage excess water flow, either through an overflow weir that allows water to spill over at a set level or a nozzle that directs controlled discharge.

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Product Specifications

Technical details and manufacturing context for Overflow Weir or Nozzle

Definition
Within a Water Collection Sump, the Overflow Weir or Nozzle is a critical safety and control component. It prevents overfilling and potential flooding by providing a designated path for excess water to exit the sump. An overflow weir is a notch or opening at a predetermined height in the sump wall, allowing water to spill over once it reaches that level. A nozzle is an outlet fitting used for a more controlled, directed discharge of water, often connected to a drainage pipe. This component ensures the sump operates within its designed capacity and protects associated equipment and infrastructure from water damage.
Working Principle
The component operates based on fluid level control. For an overflow weir, when the water level in the sump rises to the height of the weir crest, hydrostatic pressure causes the water to flow over the weir and out of the sump, maintaining a constant maximum level. For a nozzle, it acts as an outlet orifice; when a discharge valve is opened or under sufficient head pressure, water flows through the nozzle, often creating a specific jet pattern or connecting to a downstream pipe system.
Common Materials
Stainless Steel (e.g., 304, 316), Carbon Steel, PVC, Polypropylene
Technical Parameters
  • Critical dimension defining capacity. For a weir, this is typically the length of the weir crest. For a nozzle, this is the internal diameter (ID) or orifice size. (mm) Customizable
Components / BOM
  • Weir Plate / Nozzle Body
    Forms the primary structure that defines the overflow edge or discharge orifice.
    Material: Stainless Steel or Polymer
  • Mounting Flange / Threads Part
    Provides the interface for securing the component to the sump wall or connecting pipework.
    Material: Same as main body
  • Gasket / Seal Part
    Ensures a watertight seal between the component and the sump or connecting pipe.
    Material: EPDM, Nitrile, PTFE

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Overflow Weir or Nozzle.

stainless steel overflow weir plate water sump discharge nozzle industrial sump overflow components PVC overflow weir for water management threaded mounting flange nozzle

Applied To / Applications

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

Water Collection Sump
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 2 bar (0 to 29 psi) for weir; 0 to 10 bar (0 to 145 psi) for nozzle
flow rate: Up to 500 m³/h (2200 gpm) depending on configuration
temperature: 0°C to 80°C (32°F to 176°F)
slurry concentration: Up to 20% solids by weight for standard designs
Media Compatibility
✓ Municipal wastewater ✓ Industrial process water ✓ Stormwater runoff
Unsuitable: Highly corrosive chemical solutions (e.g., concentrated acids, strong oxidizers)
Sizing Data Required
  • Maximum design flow rate (m³/h or gpm)
  • Available head or pressure at inlet
  • Required discharge elevation or outlet conditions

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive erosion
Cause: High-velocity flow carrying solid particles (e.g., sand, debris) causing gradual material loss, especially at the weir crest or nozzle throat, leading to altered flow characteristics and potential structural weakening.
Cavitation
Cause: Rapid pressure drops below the vapor pressure of the fluid at the nozzle exit or weir overflow point, forming and collapsing vapor bubbles that cause pitting, vibration, and material fatigue, often due to improper design or operating conditions.
Maintenance Indicators
  • Visible irregular flow patterns (e.g., asymmetric discharge, splashing) or audible high-frequency noise/vibration indicating cavitation or blockage.
  • Visual signs of material degradation (e.g., pitting, thinning, cracks) at the weir edge or nozzle interior, often detected during inspections.
Engineering Tips
  • Implement regular ultrasonic thickness testing and flow monitoring to detect early erosion or cavitation, allowing for timely intervention before catastrophic failure.
  • Optimize operating parameters (e.g., flow rate, pressure) within design limits and use wear-resistant materials (e.g., hardened alloys, coatings) tailored to the specific fluid and environmental conditions.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality Management Systems ANSI/ASME B16.5 - Pipe Flanges and Flanged Fittings DIN 19569-10 - Wastewater Treatment Plants - Principles for the Design of Structures and Technical Equipment
Manufacturing Precision
  • Bore diameter: +/-0.05mm
  • Surface flatness: 0.1mm per 100mm length
Quality Inspection
  • Dimensional verification using coordinate measuring machine (CMM)
  • Hydrostatic pressure test at 1.5x design pressure

Factories Producing Overflow Weir or Nozzle

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What is the difference between an overflow weir and a nozzle in water collection systems?

An overflow weir allows water to spill over at a predetermined level to prevent overfilling, while a nozzle provides controlled directional discharge of water from the sump system.

Which material is best for corrosive water applications in overflow components?

Stainless steel grades 304 or 316 offer excellent corrosion resistance for most industrial water applications, while PVC and polypropylene are suitable for chemical resistance in specific environments.

How do I select the right overflow component for my water collection sump?

Consider flow rate requirements, water chemistry (corrosiveness), installation method (flange vs. threaded), and maintenance accessibility when choosing between weir plates and discharge nozzles.

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 basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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