Air Cap: Spray Angle Range 15-120 degrees

Component Specifications

Definition

The air cap is a critical component of an atomizing nozzle assembly that precisely directs and shapes compressed air flow to atomize liquid into fine droplets. It works in conjunction with the fluid nozzle to create controlled spray patterns through aerodynamic interaction between air and liquid streams. This component determines spray angle, droplet size distribution, and spray uniformity by controlling air velocity and direction at the nozzle exit.

Working Principle

The air cap operates on the principle of aerodynamic atomization where high-velocity air streams interact with liquid flow. Compressed air passes through precisely engineered orifices in the cap, creating shear forces that break the liquid into fine droplets. The cap geometry controls air flow direction and velocity, determining the spray pattern characteristics through momentum transfer between air and liquid phases.

Materials

Stainless steel (typically 303, 304, or 316 grades), brass, or engineered plastics (PTFE, PEEK) depending on chemical compatibility requirements. Surface finishes range from 0.4-1.6 μm Ra for optimal airflow characteristics.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Connection Type	1/4" NPT, BSP, or quick-connect
Spray Angle Range	15-120 degrees
Temperature Range	-20°C to 150°C
Air Orifice Diameter	0.5-3.0 mm
Flow Coefficient (Cv)	0.1-2.5
Maximum Operating Pressure	7 bar (100 psi)

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 28580, DIN 19569

Parent Products

This component is used in the following industrial products

Atomizing Nozzle

A precision component that converts liquid into fine droplets or mist through mechanical or pneumatic means.

View Product Details

Spray Gun/Nozzle Assembly

A precision assembly that atomizes and directs coating materials onto surfaces as part of a spraying system.

View Product Details

Engineering Analysis

Risks & Mitigation

Improper installation causing spray pattern distortion
Material incompatibility leading to corrosion
Orifice clogging from contaminated air supply
Excessive wear from abrasive particles in air stream

FMEA Triads

Trigger: Contaminants in compressed air supply
Failure: Orifice clogging leading to uneven spray pattern
Mitigation: Install proper filtration (5 micron minimum) in air line, implement regular maintenance schedule

Trigger: Material incompatibility with process chemicals
Failure: Corrosion and premature component failure
Mitigation: Select appropriate material grade based on chemical exposure, implement material compatibility testing

Trigger: Improper installation torque
Failure: Air leaks and reduced atomization efficiency
Mitigation: Follow manufacturer torque specifications, use calibrated torque wrenches, implement installation training

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.05 mm for critical dimensions, ±1° for spray angle

Test Method

ISO 5682-1 for hydraulic performance, ASTM E799 for droplet size analysis, visual inspection per manufacturer specifications

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 Air Cap

Manufacturer profiles associated with Air Cap.

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Frequently Asked Questions

What is the primary function of an air cap in atomizing nozzles?

The air cap controls and directs compressed air flow to atomize liquid into fine droplets and shape the spray pattern for precise industrial applications.

How do I select the right air cap for my application?

Selection depends on required spray angle, droplet size, material compatibility, operating pressure, and the specific liquid being atomized. Consult manufacturer specifications for optimal performance.

Can air caps be interchanged between different nozzle brands?

Generally not recommended due to proprietary designs and performance characteristics. Always use manufacturer-recommended components to ensure proper spray performance and safety.

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.

Air Cap