Orifice Plate/Disc: Temperature Range -40°C to 400°C

Component Specifications

Definition

A thin, precisely manufactured plate or disc with a calibrated orifice hole that serves as the critical flow-controlling element in spray nozzle assemblies. It determines the flow rate, droplet size distribution, and spray pattern by creating a pressure drop as fluid passes through the restricted opening. The component is engineered to specific tolerance levels to ensure consistent performance in industrial spraying systems.

Working Principle

Operates on the principle of fluid dynamics where liquid or gas forced through a restricted orifice experiences a pressure drop, converting pressure energy into kinetic energy. This creates a high-velocity jet that breaks into droplets upon exiting, with the orifice geometry determining spray characteristics. The flow rate follows Bernoulli's principle and is calculated using the orifice equation Q = C_d * A * sqrt(2ΔP/ρ), where C_d is discharge coefficient, A is orifice area, ΔP is pressure differential, and ρ is fluid density.

Materials

Stainless steel (AISI 304, 316, 316L), brass (C36000), tungsten carbide, ceramic (alumina, zirconia), hardened tool steel, polypropylene, PTFE, PVDF. Material selection depends on chemical compatibility, abrasion resistance, temperature range, and pressure requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Flatness	0.001mm per 25mm
Thickness	0.5mm to 3mm
Tolerance	±0.01mm to ±0.05mm
Surface Finish	Ra 0.2μm to 0.8μm
Pressure Rating	Up to 1000 bar
Orifice Diameter	0.1mm to 10mm
Temperature Range	-40°C to 400°C
Flow Coefficient (Cv)	0.01 to 10.0

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 12238

Parent Products

This component is used in the following industrial products

Spray Nozzle

A precision component that atomizes and directs liquid into a controlled spray pattern.

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Spray Nozzle/Head

The spray nozzle or head is the terminal component of a spray device responsible for breaking up liquid into droplets and controlling the spray pattern, flow rate, and distribution.

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Engineering Analysis

Risks & Mitigation

Orifice clogging from particulate contamination
Erosion/corrosion from abrasive or chemical fluids
Cavitation damage from excessive pressure drops
Improper installation causing leaks or misalignment
Thermal expansion/contraction affecting tolerances
Fatigue failure from pressure cycling

FMEA Triads

Trigger: Particulate contamination in fluid stream
Failure: Partial or complete orifice blockage
Mitigation: Install upstream filtration (10-25μm), implement regular maintenance schedules, use self-cleaning orifice designs

Trigger: Abrasive fluid components
Failure: Orifice enlargement and edge rounding
Mitigation: Select wear-resistant materials (tungsten carbide, ceramic), implement hardened coatings, design for easy replacement

Trigger: Excessive pressure differential
Failure: Cavitation erosion and material fatigue
Mitigation: Design within recommended pressure ranges, use multi-stage pressure reduction, implement pressure relief systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 2768-mK for general dimensions, ISO 8015 for geometrical tolerancing, orifice diameter tolerance typically ±0.01mm to ±0.05mm depending on application

Test Method

Flow rate testing per ISO 5167 using calibrated flow meters, dimensional verification with optical comparators or CMM, pressure testing per ASME B16.34, 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 Orifice Plate/Disc

Manufacturer profiles associated with Orifice Plate/Disc.

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Frequently Asked Questions

What factors determine orifice plate selection for spray nozzles?

Key factors include required flow rate, operating pressure, fluid properties (viscosity, density, corrosiveness), desired droplet size, spray pattern (hollow cone, full cone, flat fan), material compatibility, temperature range, and wear resistance requirements.

How does orifice diameter affect spray performance?

Smaller diameters create higher pressure drops, finer droplets, and lower flow rates, while larger diameters produce coarser droplets, higher flow rates, and lower pressure requirements. The diameter directly impacts spray angle, penetration, and coverage area.

What maintenance is required for orifice plates?

Regular inspection for wear, erosion, corrosion, and clogging; cleaning with appropriate solvents; verification of dimensional tolerances; and replacement when flow characteristics deviate beyond acceptable limits (typically ±5-10% from specification).

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.

Orifice Plate/Disc