FESTO ESNU-32-25-P-A ISO Cylinder | 32mm Bore, 25mm Stroke, Single-Acting Specs

FESTO ESNU-32-25-P-A ISO cylinder specifications. 32mm bore, 25mm stroke, single-acting pushing, elastic cushioning, M10x1.25 piston rod, G1/8 ports. Conforms to ISO 6432. For compact automation applications.

FESTO ESNU-32-25-P-A ISO Cylinder

The FESTO ESNU-32-25-P-A​ is a single-acting pneumatic cylinder​ from the ESNU series, featuring 32mm bore diameter​ and 25mm stroke. This ISO 6432 compliant cylinder is designed for industrial automation applications requiring reliable linear motion with spring return. With elastic cushioning at both ends, male thread piston rod, and compatibility with proximity sensors, it provides precise performance for applications in packaging, clamping, and positioning systems where compact size and spring return operation are required.

Key Features

• ISO 6432 Compliance:​ Standardized dimensions and mounting for easy integration

• Single-Acting Pushing Operation:​ Compressed air advances piston, spring returns

• Elastic Cushioning:​ Elastic cushioning rings/plates at both ends for end-position damping

• Compact Design:​ Small footprint for space-constrained applications

• Male Thread Piston Rod:​ M10x1.25 external thread for accessory mounting

• Position Sensing Compatible:​ Supports proximity sensor installation (requires magnetic piston)

• Operating Pressure Range:​ 1.2 to 10 bar

• Standard Mounting:​ Multiple mounting options with accessories

• Spring Return:​ Automatic retraction without compressed air

Technical Specifications

Note: Specifications are based on FESTO ESNU series technical documentation and industry standards. The exact configuration for this specific model number includes 32mm bore, 25mm stroke, elastic cushioning, and male thread piston rod.

Model Number Decoding (ESNU-32-25-P-A)

• ESNU:​ Series designation (ISO cylinder, single-acting)

• 32:​ Bore diameter (32 mm)

• 25:​ Stroke length (25 mm)

• P:​ Cushioning type (P = elastic cushioning rings/plates at both ends)

• A:​ Position sensing capability (A = compatible with proximity sensors)

Note:​ The "P" designation indicates elastic cushioning with non-adjustable end-position damping. The "A" specifies position sensing compatibility (requires magnetic piston for sensor operation). ESNU series are single-acting cylinders with spring return, unlike DSNU series which are double-acting.

Key Differences from Similar Models

Compared to other ESNU and DSNU series cylinders:

• ESNU-32-25-P-A:​ 32mm bore, 25mm stroke, single-acting, elastic cushioning, position sensing (this model)

• ESNU-25-25-P-A:​ 25mm bore with same stroke (lower force output)

• ESNU-40-25-P-A:​ 40mm bore with same stroke (higher force output)

• ESNU-32-10-P-A:​ Same bore but 10mm stroke (shorter travel)

• ESNU-32-50-P-A:​ Same bore but 50mm stroke (longer travel)

• DSNU-32-25-P-A:​ Same bore and stroke but double-acting operation (different operating principle)

The 32mm bore​ provides moderate force output for medium-duty applications, while the 25mm stroke​ offers compact travel distance. The single-acting​ design with spring return makes this model suitable for applications where automatic retraction is required without compressed air.

Typical Applications

• Clamping Devices:​ Workpiece clamping in fixture applications

• Valve Actuation:​ Operating valves in process control systems

• Positioning Systems:​ Component positioning in assembly equipment

• Ejection Mechanisms:​ Product ejection in packaging machinery

• Safety Devices:​ Emergency stop or safety release mechanisms

• Testing Equipment:​ Actuation in test stands and measurement equipment

• Compact Automation:​ Space-constrained applications requiring spring return operation

Important Selection & Installation Notes

1. Operating Principle:​ This is a single-acting​ cylinder. Compressed air advances the piston, and a spring returns it. Ensure this operating mode meets your application requirements. For applications requiring force in both directions, consider double-acting DSNU series.

2. Bore Size Consideration:​ The 32mm bore provides approximately 442N force at 6 bar. Ensure this meets your application's force requirements. For higher force, select larger bore sizes; for lower force, consider smaller bore models.

3. Stroke Consideration:​ The 25mm stroke provides moderate travel distance. Ensure this meets your application's movement requirements. For shorter strokes, select 10mm models; for longer strokes, consider 50mm or longer.

4. Spring Return Force:​ The spring provides 30N return force. Ensure this is sufficient to retract your load. For heavier loads or higher friction, consider double-acting cylinders.

5. Cushioning Performance:​ Elastic cushioning provides non-adjustable end-position damping. For applications with high speeds, ensure the cushioning is adequate.

6. Operating Pressure:​ Do not exceed 10 bar maximum operating pressure. The minimum operating pressure is 1.2 bar.

7. Air Quality:​ Use filtered, lubricated or non-lubricated compressed air according to ISO 8573-1:2010 [7:4:4]. If using lubricated air, maintain consistent lubrication.

8. Mounting:​ Ensure proper alignment during installation to avoid side loads, which can reduce seal life and cause premature failure.

9. Position Sensing:​ This model is compatible with proximity sensors for position detection. Ensure the piston has a magnetic ring (standard on most ESNU models) if position sensing is required.

10. Force Requirements:​ With 442N maximum force at 6 bar, this cylinder is suitable for medium-duty applications. Verify load requirements and safety factors.

11. Temperature Range:​ Do not operate outside -20°C to +80°C range.

12. Maintenance:​ Regular inspection of seals is recommended. Check for air leaks and proper cushioning performance periodically.

Note: For complete installation guidelines, dimensional drawings, and detailed technical data, consult the official FESTO ESNU Series Technical Manual​ or contact FESTO technical support. Always verify the exact model number configuration with the manufacturer, as notation variations may occur in different documentation systems.