Pneumatic wipers, also known as pneumatic scrapers or pneumatic rod wipers, are essential components used in pneumatic systems to protect the piston rod and cylinder from contaminants such as dust, dirt, moisture, and other particles. Here’s an overview of pneumatic wipers:

1. Functionality: Pneumatic wipers are designed to scrape or wipe contaminants from the surface of the piston rod as it moves in and out of the cylinder. By preventing contaminants from entering the cylinder, they help maintain the integrity of the pneumatic system and prolong the life of seals and other internal components.

2. Design: Pneumatic wipers typically consist of a flexible sealing lip or brush-like element mounted around the piston rod. As the rod moves, the wiper removes debris and contaminants, preventing them from entering the cylinder. Some designs may incorporate additional features such as springs or ribs to enhance sealing performance and ensure effective wiping action.

3. Materials: Pneumatic wipers are commonly made from materials such as rubber, polyurethane, or other elastomers that offer flexibility, resilience, and resistance to abrasion and environmental factors. The choice of material depends on the specific application requirements, including operating conditions, temperature, and compatibility with the pneumatic fluid.

4. Installation: Pneumatic wipers are typically installed in a groove or housing on the outer diameter of the cylinder, close to the entry point of the piston rod. Proper installation is crucial to ensure that the wiper makes effective contact with the rod surface and provides the desired level of protection against contaminants. Lubrication may be applied to the wiper to reduce friction and wear.

5. Applications: Pneumatic wipers find applications in various pneumatic systems across industries such as manufacturing, automotive, aerospace, and machinery. They are used in pneumatic cylinders, actuators, valves, and other pneumatic components where contamination control is critical for maintaining system performance and reliability.

6. Maintenance: Regular inspection and maintenance are important to ensure the effectiveness of pneumatic wipers. Any signs of wear, damage, or loss of sealing effectiveness should be addressed promptly to prevent contamination and potential damage to internal components. Proper lubrication and replacement of worn wipers are essential maintenance practices for pneumatic systems.

Overall, pneumatic wipers play a crucial role in protecting pneumatic systems from contamination, ensuring reliable and efficient operation in various industrial applications.