Orifice restrictors: Temperature Range -40°C to 200°C

Component Specifications

Definition

Orifice restrictors are precision-engineered fluid control components designed to regulate airflow by creating a calibrated restriction in pneumatic distribution channels. These devices maintain consistent pressure differentials, control flow rates, and ensure stable operation of downstream pneumatic equipment through precisely machined orifices with controlled cross-sectional areas.

Working Principle

Operates on the principle of flow restriction through a precisely sized orifice, creating a pressure drop proportional to flow rate according to Bernoulli's principle and orifice flow equations. The restriction converts pressure energy to kinetic energy, controlling mass flow rate while maintaining system stability.

Materials

Stainless steel (AISI 304/316), brass (C36000), aluminum (6061-T6), engineered plastics (PEEK, PTFE), with surface finishes Ra ≤ 0.8 μm for precision applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Leakage Class	ANSI/FCI 70-2 Class IV or better
Connection Type	NPT, BSPP, SAE, flange
Pressure Rating	0-150 psi (0-10 bar)
Orifice Diameter	0.1-10.0 mm
Temperature Range	-40°C to 200°C
Flow Coefficient (Cv)	0.001-2.5

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 6358, ISO 1219, DIN 24342, ANSI/B93.5

Parent Products

This component is used in the following industrial products

Air distribution channels

Internal pathways in air bearing pads that distribute compressed air to form the air film.

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Engineering Analysis

Risks & Mitigation

Orifice clogging from particulate contamination
Erosion leading to flow characteristic changes
Improper sizing causing system instability
Material incompatibility with process media

FMEA Triads

Trigger: Particulate contamination in air supply
Failure: Partial or complete orifice blockage
Mitigation: Install upstream filtration (5-10 μm), implement regular maintenance schedules, use self-cleaning orifice designs

Trigger: Material erosion from high-velocity flow
Failure: Increased orifice diameter beyond tolerance
Mitigation: Use erosion-resistant materials (hardened steel, ceramics), design with replaceable orifice inserts, implement flow velocity limits

Trigger: Thermal expansion/contraction
Failure: Dimensional changes affecting flow characteristics
Mitigation: Select materials with compatible thermal coefficients, design with thermal compensation, maintain within specified temperature ranges

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Orifice diameter: ±0.01 mm for precision applications, ±0.05 mm for standard applications; Flow coefficient: ±5% of specified value

Test Method

ISO 6358 for flow characteristics, pressure decay testing per ISO 1219, dimensional verification with coordinate measuring machines

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 restrictors

Manufacturer profiles associated with Orifice restrictors.

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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 is the primary function of an orifice restrictor in air distribution systems?

The primary function is to precisely control airflow rate by creating a calibrated restriction, maintaining consistent pressure differentials, and ensuring stable operation of downstream pneumatic equipment.

How do I select the correct orifice size for my application?

Selection requires calculating required flow rate, system pressure, acceptable pressure drop, and fluid properties using orifice flow equations, typically with a safety factor of 1.2-1.5 for varying conditions.

What maintenance is required for orifice restrictors?

Regular inspection for contamination buildup, verification of flow characteristics, and replacement when erosion changes orifice dimensions beyond tolerance (typically ±2% of specified diameter).

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 restrictors