Spool/Shuttle: Temperature Range -10°C to 80°C

Q: What causes spool/shuttle sticking in air valves?

Sticking is typically caused by contamination (dust, oil residue), corrosion due to moisture, inadequate lubrication, or wear from misalignment. Regular maintenance using filtered, dry air and proper lubricants prevents this.

Q: How do I select the right spool material for my application?

Choose carbon steel for general industrial use, stainless steel for corrosive environments, aluminum for lightweight needs, and engineered plastics for chemical resistance or low friction. Consider operating pressure, temperature, and media compatibility.

Component Specifications

Definition

The spool/shuttle is a cylindrical or sliding component within an air valve that moves axially to open, close, or redirect airflow passages. It features precisely machined lands and grooves that align with valve ports to control pneumatic circuit functions. This component is critical for converting electrical or mechanical input signals into controlled pneumatic output.

Working Principle

The spool/shuttle operates on the sliding principle: when actuated (by solenoid, manual lever, or pilot pressure), it moves within a valve bore, aligning its grooves with inlet, outlet, and exhaust ports. This movement either connects or blocks airflow paths, enabling functions like directional control, flow regulation, or pressure switching. Sealing is achieved through tight tolerances, O-rings, or lapped metal-to-metal surfaces.

Materials

Typically carbon steel (AISI 1018/1045), stainless steel (303/304/316), aluminum alloys (6061-T6), or engineered plastics (POM, PTFE, PEEK). Hardness: 45-60 HRC for steel, anodized or coated for corrosion resistance.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Stroke	5mm to 30mm
Diameter	6mm to 50mm
Tolerance	H7/g6 fit
Leakage Rate	<0.1 mL/min at 0.5 MPa
Surface Finish	Ra 0.4 μm or better
Temperature Range	-10°C to 80°C
Operating Pressure	0.15 to 1.0 MPa

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 5599-1, DIN 24340, ISO 15407-1

Parent Products

This component is used in the following industrial products

Air Valve (Spool/Shuttle)

A directional control valve that regulates airflow in pneumatic systems by shifting a spool or shuttle mechanism.

View Product Details

Engineering Analysis

Risks & Mitigation

Mechanical wear leading to leakage
Contamination causing jamming
Corrosion in humid environments
Improper installation causing misalignment

FMEA Triads

Trigger: Abrasive particles in airflow
Failure: Increased leakage due to worn sealing surfaces
Mitigation: Install 5-micron filters upstream; use hardened or coated spools; implement preventive maintenance schedules.

Trigger: Moisture condensation in valve body
Failure: Corrosion and sticking of spool
Mitigation: Use air dryers; specify corrosion-resistant materials (stainless steel); apply protective coatings.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Dimensional tolerances per ISO 286, leakage rates per ISO 19973-1

Test Method

Flow testing per ISO 6358, pressure decay testing, cycle life testing per ISO 19973-3

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

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

Manufacturers of Spool/Shuttle

Manufacturer profiles associated with Spool/Shuttle.

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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 causes spool/shuttle sticking in air valves?