Editorial Technical Reference

Orifice / Nozzle

This page explains how Orifice / Nozzle is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

A precision component that controls and directs fluid flow through an injection valve.

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Product Specifications

Technical details and manufacturing context for Orifice / Nozzle

Definition
The orifice/nozzle is a critical part of an injection valve that precisely regulates the flow rate, velocity, and spray pattern of fluids being injected. It creates a controlled restriction in the flow path, converting pressure energy into kinetic energy to achieve desired injection characteristics. This component is typically manufactured from stainless steel, tungsten carbide, or ceramic to withstand demanding operating conditions. Key parameters include orifice diameter (0.5–2.0 mm), flow coefficient (0.2–0.8 Cv), operating pressure (1.0–1.6 MPa), maximum pressure (2.5 MPa), operating temperature (-40 to 85 °C), tolerance (±0.05 mm per ISO 2768-m), surface roughness (Ra 0.8–1.6 μm per ISO 1302), material (316L stainless steel per ASTM A276), hardness (HRC 40–45 per ASTM E18), and weight (0.05–0.2 kg). These values are reference ranges and must be verified for the specific model and application. The orifice/nozzle is used in various industries, including fuel injection, chemical processing, and spray systems. Proper selection requires consideration of fluid properties, required flow rate, pressure drop, and spray characteristics. Installation and maintenance should follow manufacturer guidelines. Regular inspection for wear, erosion, or clogging is essential to maintain performance. Failure to operate within specified limits may lead to reduced efficiency, leakage, or component damage. Always consult the legal manufacturer or supplier to confirm model-specific values and standards.
Working Principle
Fluid enters the orifice/nozzle under pressure, accelerates as it passes through the constricted opening, and exits with controlled velocity and direction. The geometry of the orifice/nozzle determines flow characteristics, pressure drop, and spray pattern. The pressure energy is converted into kinetic energy, enabling precise control of the injection process.
Common Materials
Stainless Steel, Tungsten Carbide, Ceramic
Technical Parameters
ParameterTypical rangeNotes & selection driver
Orifice Diameter0.5–2.0 mmDetermines flow rate and spray pattern
Flow Coefficient0.2–0.8 CvAffects pressure drop and capacity
Maximum Pressure2.5 MPaExceeding may cause deformation
Operating Temperature-40–85 °COutside range may affect sealing
Tolerance±0.05 mmTighter tolerance for precise flow controlISO 2768-m
Surface RoughnessRa 0.8–1.6 μmAffects wear and corrosion resistanceISO 1302
Material316L SSCorrosion resistant for harsh mediaASTM A276
HardnessHRC 40–45 HRCEnsures wear resistanceASTM E18
Weight0.05–0.2 kgAffects handling and installation

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM
  • Orifice Plate
    Creates the flow restriction and controls flow rate
    Material: Stainless Steel
  • Nozzle Body
    Houses the orifice and provides connection to valve
    Material: Stainless Steel
  • Spray Tip Part
    Shapes and directs the fluid spray pattern
    Material: Tungsten Carbide

Applied To / Applications

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

Injection Valve
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Up to 10,000 psi (690 bar)
flow rate: 0.1 to 500 GPM (0.38 to 1893 L/min)
temperature: -40°C to 400°C (dependent on material)
slurry concentration: Max 5% solids by weight (for standard designs)
Media Compatibility
✓ Hydraulic fluids ✓ Process chemicals ✓ Compressed gases
Unsuitable: Abrasive slurries with high solids content
Sizing Data Required
  • Required flow rate (GPM or L/min)
  • System pressure differential (psi or bar)
  • Fluid properties (density, viscosity)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive erosion
Cause: High-velocity flow of particulate-laden fluids causing material degradation and dimensional changes, leading to inaccurate flow measurement and potential leakage.
Cavitation
Cause: Pressure drop below vapor pressure causing bubble formation and implosion, resulting in pitting, vibration, and structural damage to the orifice/nozzle surface.
Maintenance Indicators
  • Audible high-frequency whistling or hissing indicating flow restriction or damage
  • Visible flow measurement drift exceeding ±2% from calibrated values on downstream instruments
Engineering Tips
  • Implement upstream filtration (≥40 micron) and regular fluid analysis to minimize particulate ingress and erosion potential
  • Maintain upstream pressure at least 2.5× downstream pressure to prevent cavitation, and select erosion-resistant materials (e.g., hardened stainless steel, ceramic coatings) for high-velocity applications

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
ISO 5167: Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full ANSI/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 in circular cross-section conduits running full

Quoted from the published standard.

Manufacturing Precision
  • Bore diameter: ±0.02 mm for critical applications
  • Surface finish: Ra ≤ 0.8 μm on flow surfaces
Quality Inspection
  • Dimensional verification with coordinate measuring machine (CMM)
  • Pressure testing for leak tightness and structural integrity

Manufacturers of Orifice / Nozzle

Manufacturer profiles associated with Orifice / Nozzle.

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Frequently Asked Questions

What materials are available for the orifice/nozzle?

The orifice/nozzle is available in stainless steel, tungsten carbide, and ceramic. The material choice affects wear and corrosion resistance. Verify the specific material grade with the supplier.

What is the operating pressure range?

The operating pressure is 1.0–1.6 MPa. The maximum pressure is 2.5 MPa. Always confirm the exact limits for your application.

How does orifice diameter affect performance?

Orifice diameter (0.5–2.0 mm) determines the flow rate and spray pattern. A larger diameter allows more flow but may alter the spray characteristics. Select the diameter based on your required injection parameters.

What is the operating temperature range?

The operating temperature range is -40 to 85 °C. Operating outside this range may affect sealing and performance. Verify the temperature limits with the manufacturer for your specific media.
Data basis: editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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