Industry-Verified Manufacturing Data (2026)

Weir Plate / Nozzle Body

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Weir Plate / Nozzle Body 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 Weir Plate / Nozzle Body is characterized by the integration of Mounting Flange / Frame and Sealing Gasket / O-Ring Groove. 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 structural component that forms the flow control surface in an overflow weir or nozzle assembly.

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Product Specifications

Technical details and manufacturing context for Weir Plate / Nozzle Body

Definition
The weir plate or nozzle body is the critical flow-regulating element within an overflow weir or nozzle system. It defines the geometry and dimensions of the opening through which fluid passes, directly controlling the flow rate, discharge pattern, and hydraulic characteristics. In a weir, it is the plate over which liquid flows; in a nozzle, it is the body that shapes and accelerates the fluid jet.
Working Principle
It operates by presenting a specific geometric profile (e.g., sharp-crested, broad-crested, or a shaped orifice) to the fluid stream. The fluid's head (pressure or elevation) causes it to flow over the weir plate or through the nozzle body. The flow rate is governed by the geometry of this component (e.g., crest length for a weir, orifice diameter and shape for a nozzle) and the upstream fluid conditions, following principles like the weir equation or orifice flow equations.
Common Materials
Stainless Steel (e.g., 304, 316), Carbon Steel, Specialty Alloys, Engineering Plastics (e.g., PTFE, PVDF)
Technical Parameters
  • Critical dimensions include length/width for weir plates, and inlet/outlet diameters, throat diameter, and length for nozzle bodies. Material thickness is also a key specification. (mm) Standard Spec
Components / BOM
  • Mounting Flange / Frame
    Provides structural attachment points to secure the weir plate or nozzle body within the larger assembly or tank wall.
    Material: Typically matches main body (e.g., Stainless Steel)
  • Sealing Gasket / O-Ring Groove
    Ensures a leak-proof seal between the component and its mating surface in the assembly.
    Material: Groove machined into metal; seal material varies (EPDM, Viton, etc.)
Engineering Reasoning
0.1-3.0 bar differential pressure
Cavitation index σ < 0.3 at vena contracta
Design Rationale: Cavitation-induced erosion from local pressure dropping below vapor pressure (2.34 kPa at 20°C), causing bubble collapse with 690 MPa microjet impacts
Risk Mitigation (FMEA)
Trigger Flow velocity exceeding 15 m/s at vena contracta
Mode: Cavitation pitting with 0.5 mm/year material loss rate
Strategy: Hydrodynamic profile optimization to maintain σ > 0.5 via radius-to-throat ratio of 0.2
Trigger Cyclic thermal loading ΔT > 150°C at 0.1 Hz frequency
Mode: Thermal fatigue cracking initiating at stress concentration factor Kt > 3 locations
Strategy: Thermal stress relief through controlled cooling rate < 50°C/hour during manufacturing

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Weir Plate / Nozzle Body.

stainless steel weir plate for overflow control nozzle body assembly with mounting flange PTFE weir plate for corrosive environments carbon steel nozzle body with sealing gasket custom alloy weir plate for high-pressure applications

Applied To / Applications

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

Overflow Weir or Nozzle
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 (150 psi)
flow rate: 0.1 to 100 L/s (dependent on orifice size)
temperature: -40°C to 150°C
slurry concentration: Up to 40% solids by weight
Media Compatibility
✓ Water and aqueous solutions ✓ Chemical process fluids (pH 2-12) ✓ Mild abrasive slurries
Unsuitable: Hydrofluoric acid or highly caustic environments (pH >14)
Sizing Data Required
  • Required flow rate (L/s or GPM)
  • Available head pressure (bar or psi)
  • Orifice diameter/weir length (mm or inches)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive erosion
Cause: High-velocity slurry flow containing solid particles gradually wears away material from the weir plate surface and nozzle body interior, leading to thinning and eventual perforation.
Cavitation
Cause: Rapid pressure drops in the nozzle body create vapor bubbles that implode violently against metal surfaces, causing pitting, material loss, and structural weakening.
Maintenance Indicators
  • Visible thinning or perforation on the weir plate edge or nozzle interior walls during inspection
  • Unusual vibration, whistling, or increased noise from the nozzle body during operation indicating flow disruption or internal damage
Engineering Tips
  • Select wear-resistant materials (e.g., hardened steel, ceramic liners, or polyurethane coatings) based on the specific abrasion profile and chemical compatibility of the process fluid
  • Optimize flow dynamics through proper nozzle design (smooth internal contours, appropriate angles) and maintain operating parameters within recommended pressure/velocity ranges to minimize cavitation risk

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 1952 Flow measurement with orifice plates, nozzles and Venturi tubes
Manufacturing Precision
  • Bore diameter: +/-0.02mm
  • Surface flatness: 0.1mm per 100mm diameter
Quality Inspection
  • Dye Penetrant Test for surface defects
  • Dimensional verification with coordinate measuring machine

Factories Producing Weir Plate / Nozzle Body

Verified manufacturers with capability to produce this product in China

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✓ 98% Supplier Capability Match Found

S Sourcing Manager from Singapore Feb 25, 2026
★★★★★
"Great transparency on the Weir Plate / Nozzle Body components. Essential for our Machinery and Equipment Manufacturing supply chain."
Technical Specifications Verified
P Procurement Specialist from Germany Feb 22, 2026
★★★★☆
"The Weir Plate / Nozzle Body we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Brazil Feb 19, 2026
★★★★★
"Found 24+ suppliers for Weir Plate / Nozzle Body on CNFX, but this spec remains the most cost-effective."
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.”

12 sourcing managers are analyzing this specification now. Last inquiry for Weir Plate / Nozzle Body from India (59m ago).

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Frequently Asked Questions

What materials are best for weir plates in corrosive environments?

For corrosive environments, stainless steel grades like 316 or engineering plastics such as PTFE and PVDF offer excellent resistance to chemicals and corrosion, ensuring long-term durability and reliable flow control.

How do I ensure proper sealing in a nozzle body assembly?

Proper sealing is achieved by using compatible sealing gaskets or O-rings in the designated groove, along with precise machining of the mounting flange to prevent leaks and maintain system integrity under pressure.

Can weir plates be customized for specific flow control requirements?

Yes, weir plates and nozzle bodies can be customized in materials, dimensions, and specifications to meet specific flow rates, pressure ratings, and environmental conditions, with options for specialty alloys or engineered plastics as needed.

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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