Exit Orifice: Temperature Range -50°C to 400°C

Component Specifications

Definition

The exit orifice is a critical flow control component located at the discharge end of a swirl chamber, designed to regulate fluid velocity, pressure, and flow pattern as material exits the chamber. It converts rotational kinetic energy from the swirling fluid into controlled linear discharge, ensuring precise material distribution and process consistency in industrial applications.

Working Principle

Utilizes the Venturi effect and boundary layer principles to accelerate fluid flow while maintaining pressure differentials. As swirling fluid approaches the constricted orifice, velocity increases while static pressure decreases, creating controlled discharge characteristics. The orifice geometry (diameter, chamfer angle, surface finish) determines flow coefficient (Cv), discharge coefficient (Cd), and spray pattern characteristics.

Materials

Stainless steel (AISI 316L/304), hardened tool steel (D2/A2), tungsten carbide, ceramic (Al2O3/ZrO2), or engineered polymers (PEEK/PTFE) depending on application requirements. Surface hardness: 45-65 HRC for metallic versions. Surface roughness: Ra 0.4-1.6 μm for optimal flow characteristics.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Tolerance	±0.01 mm (diameter), ±0.5° (chamfer angle)
Pressure Rating	Up to 1000 bar
Orifice Diameter	0.5-25 mm
Temperature Range	-50°C to 400°C
Flow Coefficient (Cv)	0.01-5.0
Length To Diameter Ratio	0.5-3:1
Discharge Coefficient (Cd)	0.6-0.95

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

Standards

ISO 5167, DIN 1952, ASME MFC-3M, ISO 4401

Parent Products

This component is used in the following industrial products

Swirl Chamber

A component within spray headers and nozzles designed to impart rotational motion to fluid flow.

View Product Details

Engineering Analysis

Risks & Mitigation

Erosion from abrasive fluids
Cavitation damage at high pressure differentials
Clogging from particulate contamination
Thermal expansion mismatch
Corrosion in chemical environments

FMEA Triads

Trigger: Abrasive particle impingement
Failure: Gradual diameter enlargement (>5% tolerance)
Mitigation: Use hardened materials (tungsten carbide), install upstream filtration, implement predictive maintenance schedule

Trigger: High pressure differential (>80% of rating)
Failure: Cavitation erosion and material fatigue
Mitigation: Install pressure relief valves, use multi-stage pressure reduction, select materials with high fatigue strength

Trigger: Chemical incompatibility
Failure: Corrosion and pitting
Mitigation: Material selection based on chemical resistance charts, protective coatings (PTFE), regular pH monitoring

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Geometric tolerances per ISO 2768-m, diameter tolerance ±0.01 mm or ±0.5% of nominal (whichever is stricter), surface finish Ra ≤ 1.6 μm

Test Method

Flow calibration per ISO 5167 using gravimetric or volumetric methods, pressure testing at 150% of rated pressure for 30 minutes, material certification per ASTM/EN standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Exit Orifice

Manufacturer profiles associated with Exit Orifice.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What factors determine exit orifice sizing?

Orifice diameter is determined by required flow rate, fluid viscosity, pressure differential, and desired discharge velocity. Calculations use Bernoulli's equation with correction factors for Reynolds number and compressibility effects.

How does surface finish affect performance?

Surface roughness below Ra 1.6 μm minimizes turbulence and boundary layer separation, improving discharge coefficient consistency by 5-15% and reducing wear from abrasive fluids.

What maintenance is required?

Regular inspection for erosion, corrosion, or clogging. Cleaning with appropriate solvents, dimensional verification every 500-1000 operating hours, and replacement when diameter tolerance exceeds ±5% of nominal.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Exit Orifice