Editorial Technical Reference

Air Supply Regulator

This page explains how Air Supply Regulator 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 device that controls and maintains consistent air pressure and flow rate to the spraying system.

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Product Specifications

Technical details and manufacturing context for Air Supply Regulator

Definition
Within a Spraying Station, the Air Supply Regulator is a critical component that ensures the pneumatic system receives stable, controlled air pressure and flow. It regulates the compressed air from the main supply to match the specific requirements of spray guns, nozzles, or other pneumatic tools, directly impacting the consistency, quality, and efficiency of the coating or spraying application. The regulator is designed for use in machinery and equipment manufacturing, particularly in automated or manual spraying processes where precise air pressure is essential for uniform coating thickness and finish quality. It operates by reducing the primary (inlet) pressure to a desired secondary (outlet) pressure, compensating for fluctuations in the upstream supply. The device typically features a diaphragm or piston mechanism, an adjustable spring-loaded control knob, and a pressure gauge port for monitoring. Construction materials include brass, stainless steel, and engineering plastics, with a zinc alloy body (Zamak 5) and oil-resistant nitrile rubber (NBR) seals. Key parameters to verify for your specific application include maximum inlet pressure (2.5 MPa), flow capacity (50–200 L/min at 0.6 MPa supply, per ISO 6358), pressure regulation accuracy (±0.02 MPa under stable flow), port size (1/4–1/2 inch BSPT, per ISO 7-1), operating temperature (-20 to 60°C), weight (0.5–1.2 kg), and gauge port (1/8 inch, per ISO 7-1). Always confirm model-specific values and standards with the legal manufacturer or supplier before installation.
Working Principle
The regulator uses a diaphragm or piston mechanism. Incoming high-pressure air acts on one side of the diaphragm. A spring (adjustable via a control knob) applies force on the other side. The balance of these forces positions a valve to restrict or open the airflow passage, thereby reducing and maintaining the downstream (secondary) pressure at the desired setpoint, regardless of fluctuations in the upstream (primary) supply pressure.
Common Materials
Brass, Stainless Steel, Engineering Plastics
Technical Parameters
ParameterTypical rangeNotes & selection driver
Maximum Inlet Pressure2.5 MPaExceeding may damage the regulator
Flow Capacity50–200 L/minAt 0.6 MPa supply pressureISO 6358
Pressure Regulation Accuracy±0.02 MPaUnder stable flow conditions
Port Size1/4–1/2 inchBSPT threadsISO 7-1
Operating Temperature-20–60 °CBelow -20°C seals may harden
Body MaterialZamak 5Zinc alloy for corrosion resistanceEN 1774
Seal MaterialNBROil-resistant nitrile rubberASTM D2000
Weight0.5–1.2 kgDepends on port size
Gauge Port1/8 inchFor pressure gauge connectionISO 7-1

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
  • Adjustment Knob/Spring Part
    Allows the operator to set the desired downstream pressure by compressing the reference spring.
    Material: Plastic or Metal
  • Diaphragm/Piston Part
    The sensing element that moves in response to the balance between outlet pressure and spring force, actuating the control valve.
    Material: Rubber, Polyurethane, or Metal
  • Poppet/Control Valve
    Opens or closes the orifice to restrict airflow and achieve the desired pressure reduction.
    Material: Stainless Steel, Brass
  • Pressure Gauge
    Visually displays the regulated outlet pressure (often integrated).
    Material: Glass, Plastic, Metal
  • Body Part
    Houses internal components and provides connection ports.
    Material: Brass, Aluminum, Stainless Steel

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: 0 to 150 psi inlet, regulated 10-100 psi outlet
flow rate: Up to 25 SCFM
temperature: -20°C to 80°C
slurry concentration: Not suitable for slurries; for clean, dry air only
Media Compatibility
✓ Clean compressed air ✓ Inert gases (e.g., nitrogen) ✓ Dry process air
Unsuitable: Corrosive or abrasive media (e.g., chemical vapors, particulate-laden air)
Sizing Data Required
  • Required outlet pressure (psi)
  • Maximum air flow demand (SCFM)
  • Inlet pressure range (psi)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Diaphragm rupture
Cause: Fatigue from cyclic pressure fluctuations, chemical degradation from oil or moisture in air supply, or overpressure exceeding design limits.
Valve seat leakage
Cause: Contaminant buildup (particulates, pipe scale) preventing proper sealing, wear from abrasive particles in air stream, or misalignment from mechanical stress.
Maintenance Indicators
  • Audible hissing or whistling from regulator body indicating internal leakage
  • Visible pressure gauge fluctuation or inability to maintain set output pressure
Engineering Tips
  • Install and maintain upstream filtration (5 micron minimum) with automatic drains to remove moisture and particulates before air reaches regulator
  • Implement regular calibration checks using certified gauges and document pressure drift trends to schedule preventive maintenance before failure occurs

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 8573-1:2010 (Compressed air quality classes) ANSI/ASME B40.100-2013 (Pressure gauges and gauge attachments) DIN EN 13445-3:2021 (Unfired pressure vessels)

Quoted from the published standard.

Manufacturing Precision
  • Pressure regulation accuracy: +/- 1% of full scale
  • Leakage rate: < 0.1 SCFM at maximum operating pressure
Quality Inspection
  • Hydrostatic pressure test (1.5x maximum working pressure)
  • Flow capacity verification test
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.

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Manufacturers of Air Supply Regulator

Manufacturer profiles associated with Air Supply Regulator.

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Frequently Asked Questions

What is the maximum inlet pressure?

The maximum inlet pressure is 2.5 MPa. Exceeding this value may damage the regulator, so always verify your supply pressure does not exceed this limit.

What is the flow capacity?

The flow capacity is 50–200 L/min at 0.6 MPa supply pressure, as per ISO 6358. This range depends on the port size and operating conditions.

What materials are used in construction?

The body is made of zinc alloy (Zamak 5) per EN 1774, and seals are oil-resistant nitrile rubber (NBR) per ASTM D2000. Other materials include brass, stainless steel, and engineering plastics.

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

Related equipment

Applied To / Applications

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

Spraying Station
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Data Basis

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

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.

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 · Page last updated 12 October 2026

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