The FESTO 576103 DFSP-32-20-PS-PA is a compact pneumatic stopper cylinder designed for controlled stopping, separating, and positioning tasks in conveyor and transfer systems. As part of the DFSP series, it is intended for applications where workpiece carriers, pallets, or moving products must be reliably stopped at a defined position without requiring a large installation space. The unit combines a robust mechanical design with pneumatic actuation, making it suitable for automated production lines, assembly stations, packaging systems, and material handling equipment.
This model uses a 32 mm piston diameter and a 20 mm stroke, and it operates in a single-acting, pulling configuration. It also supports position detection via proximity switch, which allows it to be integrated into automated control systems where repeatable motion confirmation is required. The cylinder is designed with elastic cushioning at both ends, helping reduce impact stress during operation and contributing to smoother motion in stop-and-release cycles. These characteristics make the DFSP-32-20-PS-PA especially useful in systems that demand both compact layout and dependable stopping performance.
A key benefit of this product is its balance between compact size and industrial durability. FESTO specifies an operating pressure range of 0.12 MPa to 1 MPa, ambient temperature capability from -10 °C to 80 °C, and compressed air quality in accordance with ISO 8573-1:2010 [7:4:4]. The product also offers CRC 2 corrosion resistance, cleanroom suitability to Class 5 according to ISO 14644-1, and RoHS-compliant materials, which broadens its usability across different industrial environments.
Key Technical Data
| Item | Specification |
|---|---|
| Brand | FESTO |
| Part Number | 576103 |
| Model | DFSP-32-20-PS-PA |
| Product Type | Stopper cylinder |
| Stroke | 20 mm |
| Piston Diameter | 32 mm |
| Mode of Operation | Single-acting, pulling |
| Cushioning | Elastic cushioning rings/plates at both ends |
| Position Detection | Via proximity switch |
| Guide / Torque Protection | Round piston rod |
| Operating Pressure | 0.12 MPa to 1 MPa |
| Pressure Range | 1.2 bar to 10 bar |
| Pneumatic Connection | G1/8 |
| Ambient Temperature | -10 °C to 80 °C |
| Max. Cycle Frequency | 5 Hz |
| Impact Force | 3270 N |
| Permissible Lateral Force During Switching | 595 N |
| Corrosion Resistance Class | CRC 2 |
| Cleanroom Suitability | Class 5 according to ISO 14644-1 |
| Materials | Aluminium alloy body, high-alloy stainless steel piston rod, TPE-U seals |
| Product Net Weight | 500 g |
The weight shown above is an approximate value derived from FESTO’s official DFSP series weight table for the standard DFSP 32 mm version: 409 g at 0 mm stroke plus 45.5 g per additional 10 mm stroke, resulting in about 500 g for a 20 mm stroke configuration.
Product Design and Functional Advantages
The DFSP-32-20-PS-PA is engineered for reliable stopping action in automated transport systems. In many conveyor applications, stopping a moving carrier is not just a matter of force; it also requires controlled motion, repeatability, and compact installation. This cylinder addresses those needs by combining a piston, piston rod, and profile barrel design in a form factor suitable for tight machine layouts. The elastic end cushioning helps absorb motion energy at the end positions, which can reduce mechanical shock and contribute to a longer service life for both the actuator and surrounding machine components.
Because the cylinder is specified as single-acting and pulling, it is well suited to applications where one motion direction is pneumatically actuated while the return behavior is managed by the internal spring arrangement of the series concept. In practice, this can simplify pneumatic circuit design for certain stop functions and make the device attractive in handling systems where a controlled retracting or holding behavior is preferred. The pressure range down to 1.2 bar also allows flexibility in system design, provided that the application is engineered within the stated load and switching conditions.
Another practical strength of this model is its compatibility with sensor-based monitoring. The ability to use proximity switch detection allows machine builders to verify cylinder position and synchronize stopper movement with conveyors, transfer modules, or robot-assisted handling sequences. In automated production environments, this improves process transparency and can support more stable timing control.
Construction Quality and Material Selection
From a materials perspective, the DFSP-32-20-PS-PA reflects standard FESTO industrial design priorities. The cover is made from wrought aluminium alloy with an anodised finish, the cylinder barrel is smooth anodised wrought aluminium alloy, and the piston rod is made from high-alloy stainless steel. The seals use TPE-U material, which is commonly selected for pneumatic applications requiring good wear behavior and sealing performance. FESTO also states that the product is RoHS-compliant and suitable for environments requiring LABS/PWIS conformity according to VDMA24364-B1/B2-L.
These material choices matter in real factory conditions. Aluminium alloy construction helps reduce overall weight while maintaining structural rigidity, and the anodised surfaces improve resistance to wear and moderate corrosion. The stainless steel piston rod supports mechanical durability in repeated contact and stopping cycles. For production lines that run continuously and perform frequent indexing or part transfer, these details are directly relevant to service life and maintenance planning.
Application Scenarios
| Industry / System | Typical Use of DFSP-32-20-PS-PA |
|---|---|
| Conveyor Systems | Stopping pallets or carriers at defined process points |
| Assembly Automation | Positioning parts before assembly or inspection |
| Packaging Lines | Separating products for indexing or transfer |
| Material Handling | Controlling movement at buffer or handover stations |
| Automotive Production | Managing workpiece carrier flow in semi-automatic lines |
| Electronics Manufacturing | Compact stopping tasks in precision transfer units |
In application terms, this stopper cylinder is most valuable where compact dimensions, moderate stopping force, and repeatable pneumatic actuation are required. It is particularly relevant in conveyor-based automation where products or carriers must pause briefly for operations such as labeling, inspection, pressing, tightening, or pick-and-place transfer. Since FESTO lists an impact force of 3270 N and a permissible lateral force during switching of 595 N for this model, the product is positioned for genuine industrial duty rather than only light laboratory motion tasks.
Installation and System Integration
The DFSP-32-20-PS-PA supports several mounting approaches, including through-hole mounting, mounting via female thread, and installation with accessories. This flexibility allows machine designers to adapt the unit to different frame constructions and conveyor layouts. The pneumatic connection is G1/8, which is a common connection size in compact pneumatic systems and makes integration straightforward for many standard industrial air circuits.
When selecting this model, engineers should also pay attention to the operating medium quality, mounting conditions, and actual impact dynamics in the machine. FESTO states that lubricated operation is possible, but once lubrication is used, it must continue to be used. This is a normal pneumatic system consideration, yet it is important for long-term sealing performance and maintenance consistency. In addition, although the cylinder has a robust stop function, the surrounding mechanical design should still consider moving mass, approach speed, and the need for external damping where appropriate.
Why This Model Is a Practical Choice
The FESTO 576103 DFSP-32-20-PS-PA is a practical solution for users who need a compact stopper cylinder with reliable industrial performance, a defined 20 mm stroke, and the integration benefits of sensor detection. Its combination of aluminium construction, stainless steel piston rod, moderate corrosion resistance, cleanroom suitability, and broad temperature range makes it more versatile than a simple low-end pneumatic stop device.
For buyers, maintenance teams, and machine builders, this model offers three clear advantages. First, it comes from an established FESTO stopper cylinder platform with a clear technical specification base. Second, it fits common automation tasks where repeatable stop-and-release motion is required. Third, its approximate product weight of 500 g and compact design make it suitable for systems where installation space and moving mass both matter.
Conclusion
The FESTO DFSP-32-20-PS-PA, part number 576103, is a compact and dependable stopper cylinder for automated conveying and positioning applications. With a 32 mm piston diameter, 20 mm stroke, single-acting pulling operation, G1/8 connection, and support for proximity switch sensing, it is built for controlled industrial stopping tasks. Its robust material design, cleanroom suitability, CRC 2 corrosion resistance, and approximate 500 g product weight further strengthen its value in modern automation systems. For users seeking a compact pneumatic stopper that combines durability, integration flexibility, and stable operating characteristics, this model is a strong and practical choice.
